CN112302743B - Expansion power generation system for compressed air energy storage power station and operation control method thereof - Google Patents

Expansion power generation system for compressed air energy storage power station and operation control method thereof Download PDF

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Publication number
CN112302743B
CN112302743B CN202011188489.1A CN202011188489A CN112302743B CN 112302743 B CN112302743 B CN 112302743B CN 202011188489 A CN202011188489 A CN 202011188489A CN 112302743 B CN112302743 B CN 112302743B
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China
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stage
air
storage medium
valve
expander
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CN112302743A (en
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王维萌
司派友
刘双白
左川
宋亚军
吴昕
任彦
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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Publication of CN112302743A publication Critical patent/CN112302743A/en
Priority to PCT/CN2021/114399 priority patent/WO2022088885A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/18—Lubricating arrangements
    • F01D25/20—Lubricating arrangements using lubrication pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/14—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having both steam accumulator and heater, e.g. superheating accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/06—Combinations of two or more pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

The embodiment of the application provides an expansion power generation system for a compressed air energy storage power station and an operation control method thereof, and the system comprises: a plurality of inter-stage reheat air expansion generator sets and a heat storage medium subsystem; each inter-stage reheating type air expansion generating set comprises an air expansion machine and a group of reheating air storage components connected with the air expansion machine; each air expander is connected in series in a controllable manner, and each group of reheating air storage components are connected in parallel; each reheating gas storage component comprises an interstage reheater and a gas storage chamber which are sequentially connected with the corresponding air expander; each air storage chamber is respectively connected with each air compressor in the compressed air energy storage power station in the energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem. This application can effectively improve the operating stability to the inflation power generation process in compressed air energy storage power station to can effectively improve the operation security and the stability of each relevant equipment when effectively improving inflation generating efficiency.

Description

Expansion power generation system for compressed air energy storage power station and operation control method thereof
Technical Field
The application relates to the technical field of compressed air energy storage power generation, in particular to an expansion power generation system for a compressed air energy storage power station and an operation control method thereof.
Background
Due to the influence of natural environmental factors, the input of energy in the power generation process of renewable energy sources represented by wind energy and solar energy cannot be accurately controlled like fossil energy, and the renewable energy sources have the characteristics of large load and frequency fluctuation, high instability and the like, so that large-scale wind abandoning and photoelectric generation are caused. Therefore, a large-scale energy storage technology applied to the renewable energy power generation industry is generated at the same time. Compared with other types of energy storage systems, the compressed air energy storage technology has the characteristics of long service life, large energy storage capacity, strong environmental friendliness and the like, and is more and more widely applied to the technical fields of high and new energy resources such as large-scale power energy distribution and renewable energy resource application.
The power station based on the compressed air energy storage technology has the working process divided into two links which are not carried out simultaneously: an energy storage stage and an energy release stage. In the energy storage stage, the multi-stage air compressor unit which operates under variable working conditions can generate compressed air with different pressure grades along with the change of input power of abandoned wind, light and valley electric energy and respectively store the compressed air in air storage chambers with different grades, and meanwhile, an interstage cooler or a final cooler is utilized to store the heat energy generated by the air compressor unit through heat storage media such as heat conduction oil or water; in the energy release stage, compressed air stored in the energy storage stage of a certain stage of air storage chamber enters an interstage reheating type air expansion generator set of the expansion power generation system to do work to generate electric energy, an interstage reheater is arranged in front of each stage of air expansion machine of the unit for improving the efficiency of the system, and heat storage media flowing in the interstage reheater heat the inlet air of each stage of air expansion machine by using the compressed heat stored in the energy storage stage. However, the interstage reheating type air expansion generator set of the existing expansion power generation system adopts a series synchronous operation mode, so when the air storage chamber level is changed when the energy storage stage is operated under a variable working condition, the compressed air pressure level entering the interstage reheating type air expansion generator set at the energy release stage is also changed, the air expansion machines at all stages are operated under the variable working condition, and deviate from the rated working condition for a long time, so that the operation efficiency of the air expansion machines at all stages is low, and the operation efficiency of the unit, the system and the whole compressed air energy storage power station is reduced; more seriously, when the pressure level of compressed air entering the unit at the energy release stage is lower, the unit is in a low-load working condition, and because the air flow in each stage of air expansion machine is lower, the blast friction effect is easy to generate, the final stage blade and the cylinder body are rapidly heated, even the unit equipment is damaged, and extremely serious results are caused.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides an expansion power generation system for a compressed air energy storage power station and an operation control method thereof, which can effectively improve the operation stability of the expansion power generation process of the compressed air energy storage power station, and can effectively improve the operation safety and stability of each relevant device while effectively improving the expansion power generation efficiency.
In order to solve the technical problem, the application provides the following technical scheme:
in a first aspect, the present application provides an expansion power generation system for a compressed air energy storage power station, comprising: the system comprises a plurality of inter-stage reheating type air expansion generator sets and a heat storage medium subsystem used for carrying out high-temperature heat storage and low-temperature heat storage on each inter-stage reheating type air expansion generator set;
each of the inter-stage reheat air expansion generator sets includes: the system comprises an air expander and a group of reheated air storage components connected with the air expander; each air expansion machine is connected in series in a controllable manner, and each group of the reheated air storage assemblies are connected in parallel;
each reheat gas storage subassembly all includes: the system comprises an interstage reheater and an air storage chamber which are sequentially connected with corresponding air expanders; and each air storage chamber is respectively connected with each air compressor in a compressed air energy storage power station in an energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem.
In a second aspect, the present application provides an operation control method for an expansion power generation system, the operation control method being used for controlling the expansion power generation system for a compressed air energy storage power station, the operation control method comprising:
if it is determined that the inter-stage reheat air expansion generator set and the heat storage medium subsystem operate normally, performing starting pretreatment on the heat storage medium subsystem and the inter-stage reheat air expansion generator set;
selecting at least one corresponding interstage reheating type air expansion generator set as a current target control object according to a target operation condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that the single current control object meets a starting condition of the interstage reheating type air expansion generator set;
wherein the start-up control procedure of the expansion power generation of the target control object includes: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; and controlling the target control object to execute a grid connection and initial load warming process, and controlling the target control object degree load to continuously increase to a rated load so as to complete the starting process of the expansion power generation corresponding to the target control object.
In a third aspect, the present application provides an operation control device of an expansion power generation system for controlling the expansion power generation system for a compressed air energy storage power plant, the operation control device comprising:
the pretreatment module is used for carrying out starting pretreatment on the heat storage medium subsystem and the inter-stage reheat air expansion generator set if the fact that the inter-stage reheat air expansion generator set and the heat storage medium subsystem operate normally is determined;
the expansion power generation operation control module is used for selecting at least one corresponding interstage reheating type air expansion generator set as a current target control object according to a target operation working condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that the single current control object meets a starting condition of the interstage reheating type air expansion generator set;
wherein the start-up control process of the expansion power generation of the target control object includes: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; controlling the target control object to execute a grid-connection and initial load warm-up process, and controlling the target control object degree load to continuously increase to a rated load so as to complete a starting process of expansion power generation corresponding to the target control object
In a fourth aspect, the present application provides an electronic device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the operation control method of the expansion power generation system when executing the program.
In a fifth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the operational control method of an expansion power generation system as described.
According to the technical scheme, the expansion power generation system for the compressed air energy storage power station and the operation control method thereof provided by the application comprise the following steps: the system comprises a plurality of inter-stage reheating type air expansion generator sets and a heat storage medium subsystem used for carrying out high-temperature heat storage and low-temperature heat storage on each inter-stage reheating type air expansion generator set; each of the inter-stage reheat air expansion gensets includes: an air expander and a set of reheat accumulator assemblies connected to the air expander; each air expansion machine is connected in series in a controllable manner, and each group of the reheated air storage assemblies are connected in parallel; each reheat gas storage subassembly all includes: an interstage reheater and an air receiver connected in sequence with the corresponding air expander; each air storage chamber is respectively connected with each air compressor in a compressed air energy storage power station in an energy storage stage in a one-to-one mode, each inter-stage reheater is respectively connected to the heat storage medium subsystem, on the basis that the operation efficiency of the whole compressed air energy storage power station is guaranteed by arranging an inter-stage reheated air expansion generator set and the heat storage medium subsystem, each set of reheated air storage assemblies are connected in series in a controllable mode, each set of reheated air storage assemblies are connected in parallel, and each reheated air storage assembly comprises an inter-stage reheater and an air storage chamber connection which are sequentially connected with the corresponding air expander; each air storage chamber is respectively connected with each air compressor in the compressed air energy storage power station in the energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem, so that when the air storage chamber is operated under variable working conditions in the energy storage stage to change the grade, each air expander of the inter-stage reheating type air expansion power generator set of the energy release stage expansion power generation system can stably operate near a rated working condition point, and the operation stability of the expansion power generation process of the compressed air energy storage power station can be effectively improved; the expansion power generation efficiency can be effectively improved, the operation efficiency of the whole compressed air energy storage power station can be effectively improved, the operation safety and stability of each relevant device can be effectively improved while the operation efficiency of a unit, a system and the whole compressed air energy storage power station is improved, and the safe and stable operation of each relevant device can be ensured; and the operation reliability of the expansion power generation process of the compressed air energy storage power station can be effectively improved, and the operation reliability of the whole compressed air energy storage power station can be further effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an expansion power generation system for a compressed air energy storage power plant in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an expansion power generation system for a compressed air energy storage power plant in an embodiment of the present application.
Fig. 3 is a first flowchart of an operation control method of the expansion power generation system in the embodiment of the present application.
Fig. 4 is a second flowchart of an operation control method of the expansion power generation system in the embodiment of the present application.
Fig. 5 is a schematic configuration diagram of an operation control device of the expansion power generation system in the embodiment of the present application.
Fig. 6 is a schematic structural diagram of an electronic device in an embodiment of the present application.
Reference numerals are as follows:
01-an interstage reheating type air expansion generator set; 011-an air expander; 012-interstage reheaters; 013-a gas storage chamber; 02-heat storage medium subsystem 02; 03-compressed air energy storage power station; 031-an air compressor; 1-a first stage air expander; 2-a second stage air expander; 3-a third stage air expander; 4-a fourth stage air expander; 5-a gearbox reducer; 6-a generator; 7-a first clutch; 8-a second clutch; 9-a third clutch; 10-a first stage inter-stage reheater; 11-a second stage interstage reheater; 12-a third stage interstage reheater; 13-a fourth stage inter-stage reheater; 14-a primary air reservoir; 15-a secondary reservoir; 16-a tertiary reservoir; 17-a fourth stage reservoir; 18-a lubrication oil tank; 19-a first ac lube pump; 20-a second ac lube pump; 21-a dc emergency oil pump; 22-tank electric heater; 23-a lubricant purification unit; 24-a first fume exhaust fan; 25-a second range hood fan; 26-a lube oil filter; 27-a lube cooler; 28-an accumulator; 29-conventional service cooling water system; 30-a first high temperature heat storage medium pump; 31-a second high temperature heat storage medium pump; 32-a high temperature heat storage medium tank; 33-a low temperature thermal storage medium tank; 34-a conventional nitrogen generation system; 35-a first conventional nitrogen seal; 36-a second conventional nitrogen sealing device; 37-a first stage air compressor; 38-a secondary air compressor; 39-a third stage air compressor; 40-a fourth stage air compressor;
V1-a first stage reservoir outlet regulating valve; v2-first stage air expander inlet shut-off valve; v3-first stage air expander inlet trim valve; v4-first stage air expander bypass modulating valve; v5-a secondary reservoir outlet regulator valve; v6-a second stage air expander inlet shutoff valve; v7-a second stage air expander inlet trim valve; v8-a second stage air expander bypass modulating valve; v9-a third stage air receiver outlet regulating valve; v10-third stage air expander inlet shutoff valve; v11-third stage air expander inlet trim valve; v12-third stage air expander bypass modulating valve; v13-fourth stage gas receiver outlet regulating valve; v14-a fourth stage air expander inlet shutoff valve; v15-a fourth stage air expander inlet trim valve; v16-fourth stage air expander bypass modulating valve; v17-a first stage air expander sealing air inlet isolation valve; v18-second stage air expander seal wind inlet isolation valve; v19-third stage air expander seal wind inlet isolation valve; v20-fourth stage air expander seal wind inlet isolation valve; v21-isolating air inlet isolating main valve of each stage of air expander; v22-first stage air expander isolation wind inlet isolation valve; v23-second stage air expander isolation wind inlet isolation valve; v24-third stage air expander isolation wind inlet isolation valve; v25-fourth stage air expander isolation wind inlet isolation valve; v26-first conventional nitrogen seal inlet isolation valve; v27-a second conventional nitrogen seal inlet isolation valve; v28-first high temperature heat storage medium pump inlet isolation valve; v29-a first high temperature heat storage medium pump outlet isolation valve; v30-a second high temperature heat storage medium pump inlet isolation valve; v31-a second high temperature heat storage medium pump outlet isolation valve; v32-high temperature heat storage medium pump recirculation isolation valve; v33-high temperature heat storage medium pump recirculation regulating valve; v34-first stage inter-stage reheater heat storage medium side inlet isolation valve; v35-first stage inter-stage reheater heat storage medium side inlet trim valve; v36-first stage inter-stage reheater heat storage medium side outlet isolation valve; v37-a second stage interstage reheater heat storage medium side inlet isolation valve; v38-a second stage interstage reheater heat storage medium side inlet adjusting valve; v39-a second stage interstage reheater heat storage medium side outlet isolation valve; v40-third stage inter-stage reheater heat storage medium side inlet isolation valve; v41-third stage inter-stage reheater heat storage medium side inlet trim valve; v42-third stage inter-stage reheater heat storage medium side outlet isolation valve; v43-a fourth stage interstage reheater heat storage medium side inlet isolation valve; v44-fourth stage inter-stage reheater heat storage medium side inlet trim valve; v45-fourth stage inter-stage reheater heat storage medium side outlet isolation valve; v46-a first lube cooling water inlet isolation valve; v47-a first lube cooling water outlet isolation valve; v48-a second lube cooling water inlet isolation valve; v49-a second lube cooling water outlet isolation valve; v50-a first high temperature heat storage medium pump cooling water inlet isolation valve; v51-a first high temperature heat storage medium pump cooling water outlet isolation valve; v52-a second high temperature heat storage medium pump cooling water inlet isolation valve; v53-second high temperature heat storage medium pump cooling water outlet isolation valve; v54-lube pressure regulator valve; v55-lube oil temperature regulation valve; v56-primary reservoir inlet isolation valve; v57-a second stage reservoir inlet isolation valve; v58-third stage reservoir inlet isolation valve; v59-fourth stage reservoir inlet isolation valve; v60-first stage reservoir outlet isolation valve; v61-second stage reservoir outlet isolation valve; v62-third stage reservoir outlet isolation valve; v63-fourth stage reservoir outlet isolation valve; v64-first stage air receiver for air expander seal wind outlet isolation valve; v65-a second-stage air storage chamber air expander sealing air outlet isolation valve; v66-a third-stage air storage chamber air expander sealing air outlet isolation valve; v67-a fourth air storage chamber for air expander sealing air outlet isolation valve;
P1-primary reservoir pressure; p2-first stage interstage reheater outlet air pressure; p3-first stage air expander inlet pressure; p4-first stage air expander outlet pressure; p5-secondary reservoir pressure; p6-second stage inter-stage reheater outlet air pressure; p7-second stage air expander inlet pressure; p8-second stage air expander outlet pressure; p9-third stage reservoir pressure; p10-third stage inter-stage reheater outlet air pressure; p11-third stage air expander inlet pressure; p12-third stage air expander outlet pressure; p13-fourth stage reservoir pressure; p14-fourth stage inter-stage reheater outlet air pressure; p15-fourth stage air expander inlet pressure; p16-fourth stage air expander outlet pressure; p17-first stage air expander seal wind supply pressure; p18-second stage air expander seal wind supply pressure; p19-third stage air expander sealing air supply pressure; p20-fourth stage air expander sealing wind air supply pressure; p21-total pressure of isolation wind supply of each stage of air expander; p22-first stage air expander isolates wind supply air pressure; p23-second stage air expander isolation wind supply pressure; p24-third stage air expander to isolate wind supply pressure; p25-fourth stage air expander to isolate wind supply pressure; p26-high temperature heat storage medium tank pressure; p27-first high temperature heat storage medium pump outlet pressure; p28-second high temperature heat storage medium pump outlet pressure; p29-low temperature heat storage medium tank pressure; p30-water supply pressure of a conventional factory cooling water system; p31-lube tank pressure; p32-lube oil supply pressure; p33-conventional nitrogen system gas supply pressure;
T1-gas storage temperature of the primary gas storage chamber; t2-first stage inter-stage reheater outlet air temperature; t3-first stage air expander inlet air temperature; t4-first stage air expander outlet air temperature; t5-the gas storage temperature of the secondary gas storage chamber; t6-second stage interstage reheater outlet air temperature; t7-second stage air expander inlet air temperature; t8-second stage air expander outlet air temperature; t9-the gas storage temperature of the tertiary gas storage chamber; t10-third stage inter-stage reheater outlet air temperature; t11-third stage air expander inlet air temperature; t12-third stage air expander outlet air temperature; t13-fourth stage gas storage temperature of gas storage chamber; t14-fourth stage inter-stage reheater outlet air temperature; t15-fourth stage air expander inlet air temperature; t16-fourth stage air expander outlet air temperature; t17-generator first end bearing temperature; t18-generator second end bearing temperature; t19-the temperature of the bearing at the first end of the gearbox reducer; t20-gearbox reducer second end bearing temperature; t21-first stage air expander first end bearing temperature; t22-first stage air expander second end bearing temperature; t23-second stage air expander first end bearing temperature; t24-second stage air expander second end bearing temperature; t25-third stage air expander first end bearing temperature; t26-third stage air expander second end bearing temperature; t27-fourth stage air expander first end bearing temperature; t28-fourth stage air expander second end bearing temperature; t29-generator three-phase coil temperature; t30-temperature of the heat storage medium in the high-temperature heat storage medium tank; t31-temperature of heat storage medium in the low-temperature heat storage medium tank; t32-water supply temperature of a conventional factory cooling water system; t33-oil storage temperature of the lubricating oil tank; t34-lube oil supply temperature; t35-return oil temperature of gearbox reducer lubricating oil; t36-first stage air expander first end bearing lube oil return temperature; t37-oil return temperature of bearing oil at second end of first stage air expander; t38-first clutch lube oil return temperature; t39-oil return temperature of bearing oil at first end of second stage air expander; t40-the oil return temperature of the bearing at the second end of the second stage air expander; t41-second clutch oil return temperature; t42-oil return temperature of bearing oil at first end of third stage air expander; t43-oil return temperature of bearing oil at second end of tertiary air expander; t44-the third clutch oil return temperature; t45-the oil return temperature of the bearing at the first end of the fourth stage air expander; t46-oil return temperature of bearing oil at second end of fourth stage air expander;
L1-the level of the lubricating oil tank; l2-liquid level of high-temperature heat storage medium tank; l3-liquid level of the low-temperature heat storage medium tank;
f1-first stage inter-stage reheater outlet air flow rate; f2-second stage inter-stage reheater outlet air flow rate; f3-third stage inter-stage reheater outlet air flow rate; f4-fourth stage inter-stage reheater outlet air flow rate; f5-flow of heat storage medium at outlet of first-stage interstage reheater; f6-flow of heat storage medium at outlet of secondary interstage reheater; f7-flow of heat storage medium at outlet of third-stage interstage reheater; f8-flow of heat storage medium at outlet of fourth-stage interstage reheater; f9-high temperature heat storage medium pump recirculation flow;
s1-rotating speed of a generator rotor; s2-rotating speed of a rotor of the first-stage air expander; s3-rotating speed of a rotor of the second-stage air expander; s4, rotating speed of a rotor of the third-stage air expander; s5, rotating the rotor of the fourth-stage air expander;
v01-the first end of the generator is axially vibrated; v02-generator second end shaft vibration; v03-the first end shaft of the reducer of the gearbox vibrates; v04-shaft vibration at the second end of the reducer of the gearbox; v05-first stage air expander first end shaft vibration; v06-first stage air expander second end shaft oscillation; v07-second stage air expander first end shaft vibration; v08-second stage air expander second end shaft vibration; v09-third stage air expander first end shaft oscillation; v010-third stage air expander second end shaft oscillation; v011-fourth stage air expander first end shaft vibration; v012-fourth stage air expander second end shaft oscillation;
Z1-first stage air expander shaft displacement; z2-first clutch shaft displacement; z3-second stage air expander shaft displacement; z4-second clutch shaft displacement; z5-third stage air expander shaft displacement; z6-third clutch shaft displacement; z7-fourth stage air expander shaft displacement;
m1-misalignment of the first clutch shaft; m2-the second clutch shaft is not centered; m3-the third clutch shaft misalignment;
PD 1-lube filter differential pressure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Considering a power station based on a compressed air energy storage technology, the working process of the power station is divided into two links which are not performed simultaneously: an energy storage stage and an energy release stage. In the energy storage stage, the multi-stage air compressor unit which operates under variable working conditions can generate compressed air with different pressure grades along with the change of input power of abandoned wind, light and valley electric energy, and the compressed air is respectively stored in the air storage chambers with different grades, and meanwhile, the interstage cooler or the final cooler is used for storing the heat energy generated by the air compressor unit through heat storage media such as heat conduction oil or water; in the energy releasing stage, compressed air stored in the energy storing stage of one stage of air storage chamber enters an interstage reheating type air expansion generator set of the expansion power generation system to do work to generate electric energy, an interstage reheater is arranged in front of each stage of air expansion machine of the unit for improving the efficiency of the system, and heat storage media flowing in the interstage reheater heat the inlet air of each stage of air expansion machine by using the compressed heat stored in the energy storing stage. However, the interstage reheat type air expansion generating set of the existing expansion generating system adopts a multi-stage air expander series connection synchronous operation mode, so when the air storage chamber level is changed when the energy storage stage is operated under a variable working condition, the compressed air pressure level entering the interstage reheat type air expansion generating set at the energy release stage is changed along with the change of the energy storage chamber level, each stage of air expander is in variable working condition operation, deviates from a rated working condition for a long time, the operation efficiency of each stage of air expander is low, and the operation efficiency of the set, the system and the whole compressed air energy storage power station is reduced; more seriously, when the pressure level of compressed air entering the unit at the energy release stage is lower, the unit is in a low-load working condition, and because the air flow in each stage of air expansion machine is lower, the blast friction effect is easy to generate, the final stage blade and the cylinder body are rapidly heated, even the unit equipment is damaged, and extremely serious results are caused. In addition, from the perspective of the operation control of the expansion power generation system, the existing expansion power generation system cannot realize automatic start in the full stop state of the energy release stage, and cannot realize automatic stop in the operation state. Further, in the process of starting or stopping the conventional expansion power generation system at the energy release stage, if the system is operated to a certain step and the execution condition of the step is not met, the starting or stopping process cannot be continued. That is, the start and shutdown of the existing expansion power generation system require much human intervention, which greatly increases workload and labor cost, and if the expansion power generation system cannot be started or shut down in time, the normal operation of the whole compressed air energy storage power station is affected, which causes serious consequences.
In view of the above problems, the embodiments of the present application provide an expansion power generation system applied to an energy release stage of a compressed air energy storage power station and a corresponding operation control method thereof, which can realize that when the air storage chamber level changes during variable working condition operation in the energy storage stage, each level of air expander of an interstage reheating type air expansion power generation unit of the expansion power generation system in the energy release stage is in a position near a rated working condition point to operate stably, thereby improving the operation efficiency of the unit, the system and the whole compressed air energy storage power station and ensuring the safe and stable operation of each relevant device. Furthermore, the expansion power generation system can be automatically started in a full stop state and automatically stopped in an operation state in the energy release stage, and the expansion power generation system can still continue the starting or stopping process of the system if the expansion power generation system runs to a certain step and the execution condition of the step is not met in the starting or stopping process.
Specifically, the following examples are given to illustrate the respective embodiments.
In one or more embodiments provided by the application, the first clutch to the third clutch may adopt SSS (synchronous-self-shifting) clutch, the clutch is a purely mechanical device, when the input side rotor speed exceeds the output side trend, the clutch is engaged, and the output side is driven; when the rotation speed of the rotor at the input side is reduced relative to that at the output side, a reverse torque is generated, and the clutch is disengaged. In the inter-stage reheating type air expansion generator set, the rotor of the air expansion machine with high pressure grade is connected to the output end of the clutch, and the rotor of the air expansion machine with low pressure grade is connected to the input end of the clutch, so that the two rotors are disengaged and engaged. In addition, the clutch is provided with a lock and unlock button, and in a locked state, disengagement and engagement operations cannot be performed.
In order to improve the operation stability of the expansion power generation process of the compressed air energy storage power station and effectively improve the operation safety and stability of each relevant device while effectively improving the expansion power generation efficiency, the application provides an embodiment of an expansion power generation system for the compressed air energy storage power station, referring to fig. 1, the expansion power generation system for the compressed air energy storage power station specifically comprises the following contents:
the system comprises a plurality of inter-stage reheating type air expansion generator sets 01 and a heat storage medium subsystem 02 for carrying out high-temperature heat storage and low-temperature heat storage on the inter-stage reheating type air expansion generator sets 01; the heat storage medium subsystem 02 is respectively connected to each interstage reheating type air expansion generator set 01; each interstage reheating type air expansion generating set 01 comprises an air expander 011 and a group of reheating air storage components connected with the air expander 011, the air expanders 011 are connected in series in a controllable mode, and the reheating air storage components are connected in parallel; each reheating air storage assembly comprises an interstage reheater 012 and an air storage chamber 013 which are sequentially connected with the corresponding air expander 011; each of the air storage chambers 013 is connected one-to-one with each of the air compressors 031 in the compressed air energy storage plant 03 in the energy storage phase, and each of the inter-stage reheaters 012 is connected to the heat storage medium subsystem.
As can be seen from the above description, in the expansion power generation system for a compressed air energy storage power station provided in the embodiment of the present application, on the basis of ensuring the operation efficiency of the whole compressed air energy storage power station by providing the inter-stage reheat type air expansion power generation unit and the heat storage medium subsystem, each set of the reheat air storage modules are connected in series in a controllable manner, and are connected in parallel, each reheat air storage module includes an inter-stage reheater and an air storage chamber connected in sequence with the corresponding air expansion machine; each air storage chamber is respectively connected with each air compressor in the compressed air energy storage power station in the energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem, so that when the air storage chamber is operated under variable working conditions in the energy storage stage to change the grade, each air expander of the inter-stage reheating type air expansion power generator set of the energy release stage expansion power generation system can stably operate near a rated working condition point, and the operation stability of the expansion power generation process of the compressed air energy storage power station can be effectively improved; the expansion power generation efficiency can be effectively improved, the operation efficiency of the whole compressed air energy storage power station can be effectively improved, the operation safety and stability of each relevant device can be effectively improved while the operation efficiency of a unit, a system and the whole compressed air energy storage power station is improved, and the safe and stable operation of each relevant device can be ensured; and the operation reliability of the expansion power generation process of the compressed air energy storage power station can be effectively improved, and the operation reliability of the whole compressed air energy storage power station can be further effectively improved.
Referring to fig. 2, in an embodiment of the expansion power generation system for a compressed air energy storage power station, in order to make the expansion power generation system provided by the present application suitable for a four-stage air compressor, the reliability of the expansion power generation of the compressed air energy storage power station can be improved, the air compressor 031 in the compressed air energy storage power station includes: a first stage air compressor 37, a second stage air compressor 38, a third stage air compressor 39, and a fourth stage air compressor 40; correspondingly, the inter-stage reheat air expansion power generation unit 01 includes: the system comprises a first inter-stage reheating type air expansion generator set, a second inter-stage reheating type air expansion generator set, a third inter-stage reheating type air expansion generator set and a fourth inter-stage reheating type air expansion generator set; the air expander 011 includes: a first stage air expander 1, a second stage air expander 2, a third stage air expander 3 and a fourth stage air expander 4; the inter-stage reheater 012 includes: a first stage inter-stage reheater 10, a second stage inter-stage reheater 11, a third stage inter-stage reheater 12, and a fourth stage inter-stage reheater 13; the gas reservoir 013 includes: a primary air reservoir 14, a secondary air reservoir 15, a tertiary air reservoir 16 and a quaternary air reservoir 17.
The first interstage reheat air expansion genset includes: a first stage air expander 1, said first stage air expander 1 being connected to said first stage air compressor 37 via a first stage inter-stage reheater 10 and a first stage air receiver 14 connected in series; the second interstage reheat air expansion genset includes: a second stage air expander 2, the second stage air expander 2 being connected to the second stage air compressor 38 via a second stage inter-stage reheater 11 and a second stage air receiver 15 connected in series; the third interstage reheat air expansion genset includes: a third stage air expander 3, said third stage air expander 3 being connected to said third stage air compressor 39 via a third stage inter-stage reheater 12 and a third stage receiver 16 connected in series; the fourth interstage reheat air expansion genset includes: a fourth stage air expander 4, said fourth stage air expander 4 being connected to said fourth stage air compressor 40 via a fourth stage inter-stage reheater 13 and a fourth stage air receiver 17 connected in series; the first-stage air expander 1, the second-stage air expander 2, the third-stage air expander 3 and the fourth-stage air expander 4 are sequentially connected; a first clutch 7 is arranged between the first-stage air expander 1 and the second-stage air expander 2; a second clutch 8 is arranged between the second-stage air expander 2 and the third-stage air expander 3; a third clutch 9 is arranged between the third-stage air expander 3 and the fourth-stage air expander 4.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the operational reliability of an expander, and thus the reliability of expansion power generation of the compressed air energy storage power station, the first stage air expander 1 is connected to one end of a gear box reducer 5, and the other end of the gear box reducer 5 is connected to a generator 5.
That is to say, the air compressor set in the energy storage stage of the compressed air energy storage power station contains N stages of air compressors (N is a positive integer and N is not less than 1), and the interstage reheating type air expansion generator set mainly includes an air expander (total N stages), a gear box reducer (1 stage), a generator (1 stage), a clutch (total N-first stage), an interstage reheater (total N stages), an air storage chamber outlet regulating valve (total N stages), an air expander inlet cut-off valve (total N stages), an air expander inlet regulating valve (total N stages), an air expander bypass regulating valve (total N stages), an air expander sealed air inlet isolating valve (total N stages), each stage of air expander isolated air inlet isolating main valve (1), an air expander isolated air inlet isolating valve (total N stages), an air storage chamber outlet isolating valve (total N stages), an air storage chamber air supply expander sealed air outlet isolating valve (total N stages), and each stage of check valve, pressure reducing valve, a pipeline, a filter screen, a muffler, a thermal engineering measuring point and the like.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the heat storage reliability in the expansion power generation process for the compressed air energy storage power station, and further effectively improve the operational reliability of the whole compressed air energy storage power station, the heat storage medium subsystem includes a first high temperature heat storage medium pump 30, a second high temperature heat storage medium pump 31, a high temperature heat storage medium tank 32, and a low temperature heat storage medium tank 33; the first high-temperature heat storage medium pump 30 is connected to the inlet sides of the first stage inter-stage reheater 10, the second stage inter-stage reheater 11, the third stage inter-stage reheater 12, and the fourth stage inter-stage reheater 13, respectively; the second high-temperature heat storage medium pump 31 is a backup medium pump of the first high-temperature heat storage medium pump 30, and the second high-temperature heat storage medium pump 31 is also connected to the inlet sides of the first stage inter-stage reheater 10, the second stage inter-stage reheater 11, the third stage inter-stage reheater 12 and the fourth stage inter-stage reheater 13; the high-temperature heat storage medium tank 32 is respectively connected to the inlet sides of the first stage inter-stage reheater 10, the second stage inter-stage reheater 11, the third stage inter-stage reheater 12 and the fourth stage inter-stage reheater 13; the low-temperature heat storage medium tank 33 is connected to outlet sides of the first stage inter-stage reheater 10, the second stage inter-stage reheater 11, the third stage inter-stage reheater 12 and the fourth stage inter-stage reheater 13.
That is to say, the heat storage medium subsystem mainly includes high-temperature heat storage medium pumps (2, one is used and one is equipped, respectively first and second, and its motor all has the converter), high-temperature heat storage medium jar (1), low-temperature heat storage medium jar (1), high-temperature heat storage medium pump import isolating valve (2, 1 per pump), high-temperature heat storage medium pump export isolating valve (2, 1 per pump), high-temperature heat storage medium pump recirculation isolating valve (1), high-temperature heat storage medium pump recirculation transfer valve (1), interstage reheater heat storage medium side import isolating valve (total N level), interstage reheater heat storage medium side import transfer valve (total N level), interstage reheater heat storage medium side export isolating valve (total N level), and each check valve, pipeline, filter screen, thermal engineering measurement point etc..
Due to the uncertainty of renewable energy sources such as wind, light and the like, the electric energy input into the compressed air energy storage power station in the energy storage stage can generate large frequent fluctuation and is influenced by the large frequent fluctuation, and the air compressor unit can also operate under a variable working condition in the energy storage stage. Therefore, according to different compressed air storage pressure levels in the energy storage stage, the air expansion machine and the inter-stage reheater stages operated by the expansion power generation system in the energy release stage are different. In an embodiment, the air compressor unit comprises N stages of air compressors in the energy storage stage of the compressed air energy storage power station, and the compressed air storage pressure level in the energy storage stage can be 1 st to N th stages, so that the operating conditions of the expansion power generation system in the energy release stage also correspond to the 1 st to N th stages respectively. Assuming that the storage pressure level of compressed air in the energy storage stage is W-th level (W is more than or equal to 1 and less than or equal to N, and W is a positive integer), namely the air compressors in the 1 st to W-th levels in the energy storage stage operate and all generated compressed air is stored in the air storage chamber in the W-th level, the air expanders and the inter-stage reheaters in the 1 st to W-th levels of the expansion power generation system operate together in the energy release stage, namely the W-th level operation condition (the higher the value of W is, the higher the operation pressure of the corresponding air expander and the inter-stage reheater is). In summary, the compressed air storage pressure levels in the energy storage stage are N, and the expansion power generation system in the energy release stage also has N operation conditions.
Referring to fig. 2, in an embodiment of the expansion power generation system for a compressed air energy storage power plant, in order to enable the expansion power generation system provided by the present application to effectively improve the operational reliability of the first stage air expander 1, the second stage air expander 2, the third stage air expander 3, the fourth stage air expander 4, the first clutch 7, the second clutch 8, the third clutch 9 and the gearbox reducer 5, the expansion power generation system for a compressed air energy storage power plant further comprises: a conventional lubricating oil system; the conventional lubricating oil system is used for providing lubricating and cooling oil for the first-stage air expander 1, the second-stage air expander 2, the third-stage air expander 3, the fourth-stage air expander 4, the first clutch 7, the second clutch 8, the third clutch 9 and the gearbox reducer 5.
Based on the above, in order to effectively improve the application reliability of the lubricating oil system, the conventional lubricating oil system includes: a lubricating oil tank 18, and a first alternating-current lubricating oil pump 19, a second alternating-current lubricating oil pump 20, a direct-current emergency oil pump 21 and a tank electric heater 22 for heating the lubricating oil tank 18, which are respectively arranged in the lubricating oil tank 18; the first alternating-current lubricating oil pump 19, the second alternating-current lubricating oil pump 20 and the direct-current emergency oil pump 21 are connected to the first-stage air expander 1, the second-stage air expander 2, the third-stage air expander 3, the fourth-stage air expander 4, the first clutch 7, the second clutch 8, the third clutch 9 and the gear box reducer 5.
Based on the above, in order to further improve the application reliability of the lubricating oil system, the conventional lubricating oil system further includes: a lubricating oil purifying device 23 connected to the lubricating oil tank 18 and used for purifying the lubricating oil in the lubricating oil tank 18, and a first fume exhaust fan 24 and a second fume exhaust fan 25 respectively connected to the lubricating oil tank 18; the conventional lubricating oil system further comprises: a lubricant filter 26, a lubricant cooler 27, and an accumulator 28 connected to the lubricant tank 18, respectively; the lubricant filter 26 is connected to the lubricant cooler 27, and the lubricant cooler 27 is connected to the first stage air expander 1, the second stage air expander 2, the third stage air expander 3, the fourth stage air expander 4, the first clutch 7, the second clutch 8, the third clutch 9, and the gear box reducer 5 via a lubricant pressure adjusting valve V54, respectively; the lubricating oil pressure regulating valve V54, the lubricating oil tank 18 and the lubricating oil cooler 27 are all connected to a lubricating oil temperature regulating valve V55.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the cooling reliability of the expansion power generation system for the compressed air energy storage power station, and further to effectively improve the operational reliability of the whole compressed air energy storage power station, the expansion power generation system for the compressed air energy storage power station further includes: a conventional service cooling water system 29; the conventional service cooling water system 29 is respectively connected with the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31; a first lubricating oil cooling water inlet isolation valve V46 is arranged on a connecting pipeline between the conventional plant cooling water system 29 and a first cooling water inlet of the lubricating oil cooler 27, and a first lubricating oil cooling water outlet isolation valve V47 is arranged on a connecting pipeline between the conventional plant cooling water system 29 and a first cooling water outlet of the lubricating oil cooler 27; a second lubricating oil cooling water inlet isolation valve V48 is arranged on a connecting pipeline between the conventional factory cooling water system 29 and the second cooling water inlet of the lubricating oil cooler 27, and a second lubricating oil cooling water outlet isolation valve V49 is arranged on a connecting pipeline between the conventional factory cooling water system 29 and the second cooling water outlet of the lubricating oil cooler 27.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the nitrogen reliability of an expansion power generation system for a compressed air energy storage power station, and further effectively improve the operational reliability of the whole compressed air energy storage power station, the expansion power generation system for a compressed air energy storage power station further includes: a first conventional nitrogen seal 35 and a second conventional nitrogen seal 36; the first conventional nitrogen sealing device 35 is connected to the high-temperature heat storage medium tank 32, the first conventional nitrogen sealing device 35 is further connected to a first conventional nitrogen making system 34, and a first conventional nitrogen sealing device inlet isolation valve V26 is arranged between the first conventional nitrogen sealing device 35 and the first conventional nitrogen making system 34; the second conventional nitrogen sealing device 36 is connected to the low-temperature heat storage medium tank 33, the second conventional nitrogen sealing device 36 is further connected to a second conventional nitrogen generating system 34, and a second conventional nitrogen sealing device inlet isolation valve V27 is arranged between the second conventional nitrogen sealing device 36 and the second conventional nitrogen generating system 34; the first-stage air expander 1, the second-stage air expander 2, the third-stage air expander 3 and the fourth-stage air expander 4 are respectively connected to an isolation air inlet isolation main valve of each stage of air expander, and the isolation air inlet isolation main valve of each stage of air expander is connected with a third conventional nitrogen production system 34.
That is to say, the conventional lubricating oil system, the conventional plant cooling water system, the conventional nitrogen production system and the conventional nitrogen sealing device (one each of the high-temperature heat storage medium tank and the low-temperature heat storage medium tank, the first heat storage medium tank and the second heat storage medium tank are respectively) can provide various auxiliary working media meeting parameter requirements for the expansion power generation system. The conventional lubricating oil system can provide lubricating and cooling oil for the 1 st to N th stages of air expanders, the first to # N-1 clutches and the gearbox reducer, and mainly comprises: the system comprises a lubricating oil tank (1), an alternating-current lubricating oil pump (2 sets), a first standby and a second standby, a direct-current accident oil pump (1 set), an oil tank electric heater (1 set), a lubricating oil purification device (1 set), a fume exhaust fan (2 sets), a first standby and a second standby, a lubricating oil filter (1 set, duplex switchable), a lubricating oil cooler (1 set, duplex switchable), an energy accumulator (1 set), a lubricating oil pressure regulating valve (1), a lubricating oil temperature regulating valve (1), check valves, pipelines, filter screens, thermal measurement points and the like; the conventional factory cooling water system can provide cooling water for a lubricating oil cooler, a first high-temperature heat storage medium pump and a second high-temperature heat storage medium pump, a first lubricating oil cooling water inlet isolating valve and a second lubricating oil cooling water inlet isolating valve are respectively arranged on two cooling water inlet pipelines of the lubricating oil cooler, a first lubricating oil cooling water outlet isolating valve and a second lubricating oil cooling water outlet isolating valve are respectively arranged on two cooling water outlet pipelines of the lubricating oil cooler, a first high-temperature heat storage medium pump cooling water inlet isolating valve and a second high-temperature heat storage medium pump cooling water inlet isolating valve are respectively arranged on a cooling water inlet pipeline of the first high-temperature heat storage medium pump and a cooling water outlet isolating valve of the second high-temperature heat storage medium pump are respectively arranged on a cooling water outlet pipeline of the first high-temperature heat storage medium pump and a cooling water outlet pipeline of the second high-temperature heat storage medium pump; the conventional nitrogen making system can provide a stable inflation air source for the first and second conventional nitrogen sealing devices, and also provides a stable isolation air source for the 1 st-N stage air expanders for isolating air and lubricating oil; the first and second conventional nitrogen sealing devices can meet the requirement of the operating pressure of the high and low temperature heat storage medium tanks, can isolate the heat storage medium from air so as to prolong the service life of the heat storage medium, and inlet pipelines of the first and second conventional nitrogen sealing devices are respectively provided with an inlet isolation valve of the first and second conventional nitrogen sealing devices, wherein the clutch mentioned in the embodiment of the application can adopt an SSS clutch.
Referring to fig. 2, in an embodiment of the expansion power generation system for a compressed air energy storage power plant, in order to enable the expansion power generation system provided herein to effectively improve the degree of automation, stability and effectiveness of control for the first stage air expander 1, the first stage air compressor 37 is connected to the first stage air receiver 14 via a first stage air receiver inlet isolation valve V56; the first stage air receiver 14 is connected to the first stage inter-stage reheater 10 through a first stage air receiver outlet isolation valve V60 and a first stage air receiver outlet regulating valve V1 which are connected in sequence; the first-stage interstage reheater 10 is connected to the first-stage air expander 1 through a first-stage air expander inlet cutoff valve V2 and a first-stage air expander inlet adjustment valve V3 which are connected in sequence; the first stage inter-stage reheater 10 is also connected to the heat storage medium subsystem via a first stage inter-stage reheater heat storage medium side inlet damper V35 and a first stage inter-stage reheater heat storage medium side inlet isolation valve V34 connected in series; the first stage air expander 1 is connected with a silencer, a first stage air expander bypass adjusting valve V4 is arranged between the first stage inter-stage reheater 10 and the first stage inter-stage reheater heat storage medium side inlet adjusting valve V35, and the first stage air expander bypass adjusting valve V4 is connected to the silencer corresponding to the first stage air expander 1.
Referring to fig. 2, in an embodiment of the expansion power generation system for a compressed air energy storage power plant, in order to enable the expansion power generation system provided by the present application to effectively improve the degree of automation, stability and effectiveness of the control over the second stage air expander 2, the second stage air compressor 38 is connected to the second stage air receiver 15 via a second stage air receiver inlet isolation valve V57; the second-stage air receiver 15 is connected to the second-stage inter-stage reheater 11 through a second-stage air receiver outlet isolation valve V61 and a second-stage air receiver outlet damper V5 which are connected in sequence; the second-stage inter-stage reheater 11 is connected to the second-stage air expander 2 via a second-stage air expander inlet cut-off valve V6 and a second-stage air expander inlet trim valve V7 which are connected in sequence; the second-stage inter-stage reheater 11 is also connected to the heat storage medium subsystem through a second-stage inter-stage reheater heat storage medium side inlet adjusting valve V38 and a second-stage inter-stage reheater heat storage medium side inlet isolating valve V37 which are connected in sequence; the second stage air expander 2 is connected to a muffler, and a second stage air expander bypass control valve V8 is provided between the second stage inter-stage reheater 11 and the second stage inter-stage reheater heat storage medium side inlet control valve V38, and the second stage air expander bypass control valve V8 is connected to the muffler corresponding to the second stage air expander 2.
Referring to fig. 2, in an embodiment of the expansion power generation system for a compressed air energy storage power plant, in order to enable the expansion power generation system provided herein to effectively improve the degree of automation, stability and effectiveness of control for the third stage air expander 3, the third stage air compressor 39 is connected to the third stage storage tank 16 via a third stage storage tank inlet isolation valve V58; the third stage air receiver 16 is connected to the third stage inter-stage reheater 12 via a third stage air receiver outlet isolation valve V62 and a third stage air receiver outlet adjustment valve V9 which are connected in sequence; the third-stage interstage reheater 12 is connected to the third-stage air expander 3 through a third-stage air expander inlet shutoff valve V10 and a third-stage air expander inlet regulating valve V11 which are connected in sequence; the third-stage inter-stage reheater 12 is also connected to the heat storage medium subsystem through a third-stage inter-stage reheater heat storage medium side inlet adjusting valve V41 and a third-stage inter-stage reheater heat storage medium side inlet isolation valve V40 which are connected in sequence; the third stage air expander 3 is connected to a muffler, and a third stage air expander bypass control valve V12 is provided between the third stage inter-stage reheater 12 and the third stage inter-stage reheater heat storage medium side inlet control valve V41, and the third stage air expander bypass control valve V12 is connected to the muffler corresponding to the third stage air expander 3.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power plant, in order to enable the expansion power generation system provided herein to effectively improve the degree of automation, stability and effectiveness of control for the fourth stage air expander 4, the fourth stage air compressor 40 is connected to the fourth stage air receiver 17 via a fourth stage air receiver inlet isolation valve V59; the fourth air reservoir 17 is connected to the fourth interstage reheater 13 via a fourth air reservoir outlet isolation valve V63 and a fourth air reservoir outlet adjustment valve V13 connected in series; the fourth interstage reheater 13 is connected to the fourth air expander 4 via a fourth air expander inlet shutoff valve V14 and a fourth air expander inlet adjustment valve V15, which are connected in series; the fourth inter-stage reheater 13 is also connected to the heat storage medium subsystem via a fourth inter-stage reheater heat storage medium side inlet trim valve V44 and a fourth inter-stage reheater heat storage medium side inlet isolation valve V43 connected in series; the fourth stage air expander 4 is connected to a muffler, and a fourth stage air expander bypass damper V16 is provided between the fourth stage inter-stage reheater 13 and the fourth stage inter-stage reheater heat storage medium side inlet damper V44, and the fourth stage air expander bypass damper V16 is connected to the muffler corresponding to the fourth stage air expander 4.
Referring to fig. 2, in an embodiment of the expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the degree of automation, stability and effectiveness of control for isolating the air inlet of the air expander, the expansion power generation system for a compressed air energy storage power station further includes: a first stage air expander isolation air inlet isolation valve V22, a second stage air expander isolation air inlet isolation valve V23, a third stage air expander isolation air inlet isolation valve V24 and a fourth stage air expander isolation air inlet isolation valve V25 which are respectively connected with the isolation air inlet isolation main valves of the air expanders in parallel; the first stage air expander isolation wind inlet isolation valve V22 is connected to the conduit between the first clutch 7 and the first stage air expander 1; the second stage air expander isolation wind inlet isolation valve V23 is connected to the conduit between the first clutch 7 and the second stage air expander 2; the third stage air expander isolating wind inlet isolating valve V24 is connected to the conduit between the third clutch 9 and the third stage air expander 3; the fourth stage air expander isolating wind inlet isolating valve V25 is connected to the conduit between the third clutch 9 and the fourth stage air expander 4.
Referring to fig. 2, in an embodiment of the expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the degree of automation, stability and effectiveness of control over the air expander sealing air inlet, the expansion power generation system for a compressed air energy storage power station further includes: a first stage air expander sealing air inlet isolation valve V17, a second stage air expander sealing air inlet isolation valve V18, a third stage air expander sealing air inlet isolation valve V19 and a fourth stage air expander sealing air inlet isolation valve V20 which are connected in parallel; the first stage air expander seal wind inlet isolation valve V17 is connected to the conduit between the first clutch 7 and the first stage air expander 1; the second stage air expander seal air inlet isolation valve V18 is connected to the conduit between the first clutch 7 and the second stage air expander 2; the third stage air expander seal air inlet isolation valve V19 is connected to the conduit between the third clutch 9 and the third stage air expander 3; the fourth stage air expander seal wind inlet isolation valve V20 is connected to the conduit between the third clutch 9 and the fourth stage air expander 4.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the automation degree, stability and effectiveness of control over the air expander sealed air outlet, the expansion power generation system for a compressed air energy storage power station further includes: a first-stage air storage chamber air supply expander sealing air outlet isolation valve V64, a second-stage air storage chamber air supply expander sealing air outlet isolation valve V65, a third-stage air storage chamber air supply expander sealing air outlet isolation valve V66 and a fourth-stage air storage chamber air supply expander sealing air outlet isolation valve V67 which are connected in parallel; the first-stage air storage chamber is connected with the first-stage air storage chamber 14 through an air expander sealing air outlet isolation valve V64; the second-stage air storage chamber is used for connecting an air expander sealing air outlet isolation valve V65 with the second-stage air storage chamber 15; the third-stage air storage chamber is used for connecting an air expander sealing air outlet isolation valve V66 with the third-stage air storage chamber 16; the fourth air storage chamber is used for connecting an air expander sealing air outlet isolation valve V67 with the fourth air storage chamber 17.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power plant, in order to enable the expansion power generation system provided by the present application to effectively improve the degree of automation, stability and effectiveness of control for the inter-stage reheater heat storage medium side outlet, a first inter-stage reheater heat storage medium side outlet isolation valve V36, a second inter-stage reheater heat storage medium side outlet isolation valve V39, a third inter-stage reheater heat storage medium side outlet isolation valve V42 and a fourth inter-stage reheater heat storage medium side outlet isolation valve V45 are connected in parallel; the first stage inter-stage reheater heat storage medium side outlet isolation valve V36 is connected with the first stage inter-stage reheater 10; the second stage inter-stage reheater heat storage medium side outlet isolation valve V39 is connected to the second stage inter-stage reheater 11; the third stage inter-stage reheater heat storage medium side outlet isolation valve V42 is connected to the third stage inter-stage reheater 12; the fourth stage inter-stage reheater heat storage medium side outlet isolation valve V45 is connected to the fourth stage inter-stage reheater 13.
Referring to fig. 2, in an embodiment of an expansion power generation system for a compressed air energy storage power station, in order to enable the expansion power generation system provided by the present application to effectively improve the degree of automation, stability and effectiveness of control over a conventional plant cooling water system 29 and a high-temperature heat storage medium pump, a first high-temperature heat storage medium pump inlet isolation valve V28 is arranged between a first high-temperature heat storage medium pump 30 and a high-temperature heat storage medium tank 32, and a second high-temperature heat storage medium pump inlet isolation valve V30 is arranged between a second high-temperature heat storage medium pump 31 and the high-temperature heat storage medium tank 32; the first high-temperature heat storage medium pump 30 is connected to the inlet sides of the first stage inter-stage reheater 10, the second stage inter-stage reheater 11, the third stage inter-stage reheater 12 and the fourth stage inter-stage reheater 13 through a first high-temperature heat storage medium pump outlet isolation valve V29; the second high temperature heat storage medium pump 31 is connected to the inlet sides of the first stage inter-stage reheater 10, the second stage inter-stage reheater 11, the third stage inter-stage reheater 12, and the fourth stage inter-stage reheater 13, respectively, via a second high temperature heat storage medium pump outlet isolation valve V31; a high-temperature heat storage medium pump recirculation regulating valve V33 and a high-temperature heat storage medium pump recirculation isolating valve V32 are sequentially connected between the high-temperature heat storage medium tank 32 and the first high-temperature heat storage medium pump outlet isolating valve V29; a first high-temperature heat storage medium pump cooling water inlet isolation valve V50 is connected between the conventional plant cooling water system 29 and the inlet side of the first high-temperature heat storage medium pump 30, and a second high-temperature heat storage medium pump cooling water inlet isolation valve V52 is connected between the conventional plant cooling water system 29 and the inlet side of the second high-temperature heat storage medium pump 31; a first high-temperature heat storage medium pump cooling water outlet isolation valve V51 is connected between the conventional plant cooling water system 29 and the outlet side of the first high-temperature heat storage medium pump 30, and a second high-temperature heat storage medium pump cooling water outlet isolation valve V53 is connected between the conventional plant cooling water system 29 and the outlet side of the second high-temperature heat storage medium pump 31.
That is, in the inter-stage reheat air expansion genset, the W-th stage air receiver is used to store high pressure air discharged from the W-th stage air compressor outlet; in one embodiment, the W-th air storage chamber provides high-pressure air for the 1 st-W-th air expansion machines to do work and generate power under the W-th operation working condition in the energy release stage.
By the W level that air compressor's outlet pipe drawn forth has arranged the W level in proper order on the reservoir inlet pipe reservoir inlet isolating valve, filter screen, check valve, close completely reservoir inlet isolating valve can make reservoir and energy storage stage air compressor keeps apart to produce the influence with air compressor's operation to the reservoir, and the filter screen is used for getting rid of air compressor export high-pressure air contains impurity, and the check valve can prevent high-pressure air refluence entering in the reservoir air compressor.
The W-th air storage chamber outlet isolating valve is arranged on an outlet pipeline of the W-th air storage chamber, and the W-th air storage chamber outlet isolating valve is closed completely, so that the W-th air storage chamber stops supplying air to the downstream. The W-th stage reservoir outlet modulating valve is arranged downstream of the W-th stage reservoir outlet isolating valve and is used for modulating W-th stage inter-stage reheater outlet air pressure. The W-level interstage reheater is a surface type heat exchanger, the interior of the interstage reheater is composed of an air side (temperature rising) and a heat storage medium side (temperature lowering), the air side is arranged at the downstream of the W-level gas storage chamber outlet adjusting valve, and a filter screen is arranged on an air side outlet pipeline and used for removing impurities contained in high-pressure air.
The filter screen low reaches divide into two the tunnel, do all the way the inlet pipeline of air expander, the W level has arranged in proper order on the inlet pipeline of air expander import trip valve, W level the air expander import is transferred the valve. In the accident or normal shutdown stage, the W-th stage air expander inlet cut-off valve is quickly and fully closed, and the W-th stage air expander can be stopped from continuously feeding air by adjusting the valve so as to prevent the influence on the normal idle running of the rotor; under the first-stage operating condition, the first-stage air expander inlet cutoff valve is fully opened, and the first-stage air expander inlet regulating valve is used for regulating the first-stage air expander rotor speed and load lifting; and under the Y (1 yarn Y is less than or equal to N, Y is a positive integer) level operation working condition, fully opening the Y level inlet cut-off valve of the air expansion machine, adjusting the Y level inlet adjusting valve of the air expansion machine to adjust the 1 st to Y level rotor lifting speed and load lifting, simultaneously fully opening the 1 st to Y-first level inlet cut-off valve of the air expansion machine and fully opening the 1 st to Y-first level inlet adjusting valve of the air expansion machine.
The other way of the downstream of the filter screen is a bypass pipeline of the air expander, and a W-level bypass adjusting valve, a check valve and a silencer of the air expander are sequentially arranged on the W-level bypass pipeline of the air expander. The first stage air expander bypass regulating valve is used for quickly establishing the air inlet parameters of the first stage air expander before the inter-stage reheating type air expansion generator set is started under the first stage operation condition, the Y stage air expander bypass regulating valve is used for quickly establishing the air inlet parameters of the Y stage air expander while the 1 st-Y stage air expander bypass regulating valve is fully closed under the Y stage operation condition, and the W stage air expander bypass regulating valve is quickly and fully opened during the accident or normal shutdown stage, so that the pre-machine air pressure of the W stage air expander can be quickly released to prevent the W stage air expander inlet cut-off valve and the regulating valve from being poor in tightness to influence the unit shutdown; the check valve can prevent the external atmosphere from flowing backwards; and the muffler with the outlet communicated with the outside atmosphere is used for relieving the exhaust noise of the bypass pipeline. And a check valve capable of preventing downstream gas from flowing back to enter the air expander is arranged on an outlet pipeline of the W-th stage air expander.
The air expander is provided with a sealing air pipeline which is divided into a sealing air supply pipeline and a sealing pipeline of the air storage chamber according to different air sources, and in the early stage of starting and the idle running stopping stage of the interstage reheating type air expansion generator set, because the pressure of the sealing air source is too low and unstable, the sealing air source is provided by the air storage chamber; along with the unit start-up process goes on, self sealss air supply pressure is normal gradually, and sealed wind air supply is by the reservoir gradually transitions to the self sealss and provides.
The sealing air supply pipeline of the air storage chamber consists of N leading-out pipelines of the air storage chamber and N sealing air distribution pipelines of the air expanders, a W-level air storage chamber sealing air outlet isolating valve is arranged on a W-level air storage chamber leading-out pipeline, the N leading-out pipelines of the air storage chamber are converged and then distributed to 1-N air expanders through a filter screen, during the starting or stopping of the expansion power generation system, the W-level air storage chamber sealing air outlet isolating valve is fully opened under the W-level operation working condition, and other air storage chamber sealing air expander sealing air outlet isolating valves are fully closed, so that sealing air can be completely provided by the W-level air storage chamber, the check valve can prevent downstream gas from flowing back into the air storage chamber, and the filter screen is used for removing impurities contained in high-pressure air; the W-th-stage air expander is characterized in that a W-th-stage air expander sealing air inlet isolating valve, a pressure reducing valve and a check valve are sequentially arranged on a sealing air distribution pipeline of the W-th-stage air expander, the W-th-stage air expander sealing air inlet isolating valve can cut off the W-th-stage air expander to supply sealing air from the air storage chamber, the pressure reducing valve is used for reducing the pressure of the sealing air from the air storage chamber to first preset pressure so as to meet the sealing requirement of the W-th-stage air expander in the stages of increasing the rotating speed and low load, and the check valve can prevent downstream gas from flowing backwards.
W-level self sealing pipeline is by W-level the low reaches pipeline of reservoir outlet governing valve is drawn forth, has arranged filter screen, relief pressure valve, check valve in proper order on the W-level self sealing pipeline, and W-level the sealed wind distribution pipeline export of air expander enters W-level with W-level self sealing pipeline export after joining the air expander, and the filter screen is used for getting rid of the high-pressure air impurity that contains, and the relief pressure valve is used for will passing through W-level sealed wind atmospheric pressure after the reservoir outlet governing valve throttle falls to the second and predetermines pressure in order to satisfy W-level the air expander is in the self sealing demand of high load stage (in an embodiment, the concrete numerical value of first default pressure and second default pressure by the grade decision of air expander, and W-level the second default pressure of air expander is a bit bigger than first default pressure and can make sealed wind gas source along with W-level the rising of reservoir outlet governing valve low reaches atmospheric pressure is automatic by the reservoir switches into), and the check valve can prevent low reaches gas from sealing.
The W-level air expander is provided with an isolation air main pipeline and N branch pipelines, an isolation air inlet isolation main valve, a filter screen and a pressure reducing valve of each level of air expander are sequentially arranged on the isolation air main pipeline, the isolation air inlet isolation main valve of each level of air expander can be completely closed to cut off the supply of a conventional nitrogen system to isolation air, the filter screen is used for removing impurities contained in nitrogen, and the pressure reducing valve is used for reducing the pressure of the isolation air from the conventional nitrogen system to a third preset pressure; the W-level air expansion machine isolation air inlet isolation valve and the check valve are sequentially arranged on an isolation air branch pipeline of the W-level air expansion machine, the W-level air expansion machine isolation air inlet isolation valve can cut off the supply of isolation air to the W-level air expansion machine, and the check valve can prevent downstream gas from flowing backwards.
The 1 st to N th stages of the air expanders have the same rotor rotation speed and are coaxially arranged, the gear box reducer is connected with the generator through a coupler, the rated rotor rotation speed of the air expander is finally reduced to the rated rotor speed of the generator through the gear box reducer, a first clutch is arranged between the rotor of the first stage of the air expander and the rotor of the second stage of the air expander, and the like, a # N-1 clutch is arranged between the rotor of the N-first stage of the air expander and the rotor of the N-th stage of the air expander, the number of stages of the air expander in operation can be changed through engagement and disengagement of the clutches, the first clutch is disengaged under the first stage operation condition, the # Y clutch is disengaged under the Y stage operation condition (when Y = N), and the first to # Y-1 clutches are engaged.
In the heat storage medium subsystem, the high-temperature heat storage medium tank is used for storing the high-temperature heat storage medium after absorbing the compression heat in the energy storage stage for use in the energy release stage, the tank body is respectively connected with the inlet pipelines of the first and second high-temperature heat storage medium pumps, and simultaneously the inlet pressure requirements of the first and second high-temperature heat storage medium pumps can be met through the high-position arrangement mode of the tank body so as to prevent cavitation.
The first or second high-temperature heat storage medium pump can provide enough pressure head to enable the high-temperature heat storage medium to enter the heat storage medium side of the 1 st-N-stage inter-stage reheater to release heat, the first or second high-temperature heat storage medium pump is driven by a motor with a frequency converter, and the double-pump parallel arrangement mode can meet the requirements of equipment rotation and standby and the requirements of simultaneous use, and the specific implementation is determined according to actual conditions, so that the application is not limited.
First it has arranged first in proper order on the inlet pipeline of high temperature heat-retaining medium pump import isolating valve, filter screen, the second has arranged the second in proper order on the inlet pipeline of high temperature heat-retaining medium pump import isolating valve, filter screen, close first, second it is first, the second respectively can stop the operation by high temperature heat-retaining medium pump import isolating valve high temperature heat-retaining medium pump cuts off the inflow of high temperature heat-retaining medium simultaneously, and the filter screen is used for getting rid of the high temperature heat-retaining medium impurity that contains.
First the back valve has been arranged in proper order on the outlet pipe of high temperature heat-retaining medium pump, first high temperature heat-retaining medium pump export isolating valve, the second the back valve has been arranged in proper order on the outlet pipe of high temperature heat-retaining medium pump, second high temperature heat-retaining medium pump exports isolating valve, and the back valve can prevent that downstream high temperature heat-retaining medium from flowing backwards and get into high temperature heat-retaining medium pump, closes completely first, second high temperature heat-retaining medium pump export isolating valve can make first, second respectively high temperature heat-retaining medium pump stops the fortune.
The high-temperature heat storage medium pump recycling isolation valve and the adjusting valve are sequentially arranged on a recycling pipeline between an outlet main pipe of the first high-temperature heat storage medium pump and an outlet main pipe of the second high-temperature heat storage medium pump and the high-temperature heat storage medium tank, the high-temperature heat storage medium pump recycling isolation valve is fully opened, the opening degree of the high-temperature heat storage medium pump recycling adjusting valve is adjusted, and therefore the first high-temperature heat storage medium pump or the second high-temperature heat storage medium pump can be prevented from having outlet flow smaller than a cavitation safety value.
The heat storage medium side inlet pipeline of the 1 st-N stage reheaters is connected with the outlet main pipe of the first high-temperature heat storage medium pump and the outlet main pipe of the second high-temperature heat storage medium pump, the W-stage reheater heat storage medium side inlet isolating valve, the adjusting valve and the filter screen are sequentially arranged on the heat storage medium side inlet pipeline of the W-stage reheater, the heat storage medium side outlet pipelines of the 1 st-N stage reheaters are converged and then enter the low-temperature heat storage medium tank, the W-stage reheater heat storage medium side outlet isolating valve is arranged on the heat storage medium side outlet pipeline of the W-stage reheater, the W-stage reheater heat storage medium side outlet isolating valve is fully closed, the W-stage reheater heat storage medium side inlet isolating valve, the inlet adjusting valve and the outlet isolating valve can stop the W-stage reheater, the W-stage reheater heat storage medium side inlet adjusting valve can also adjust the W-stage air expander inlet air temperature, the filter screen is used for removing impurities contained in the high-temperature heat storage medium, and the low-temperature heat storage medium tank is used for storing the low-released low-temperature heat storage medium for use in the energy storage stage.
In an embodiment of the expansion power generation system for a compressed air energy storage power station, necessary related thermal measurement points are also arranged in the expansion power generation system. The thermal measurement points can be, for example, pressure measurement points, differential pressure measurement points, temperature measurement points, liquid level measurement points, flow measurement points, rotating speed measurement points, vibration measurement points, axis displacement measurement points, axis misalignment measurement points and the like, and include: <xnotran> 1 ～ N , 1 ～ N , 1 ～ N , 1 ～ N , 1 ～ N , , 1 ～ N , , , , , , , , , 1 ～ N , 1 ～ N , 1 ～ N , 1 ～ N , , , 1 ～ N , , , , , , , , 1 ～ N , ～ # N-1 , , , , 1 ～ N , 1 ～ N , , , 1 ～ N , </xnotran> Shaft vibration at two ends of a generator, shaft vibration at two ends of a reducer of a gear box, shaft vibration at two ends of a 1 st-N-level air expander, shaft displacement of the 1 st-N-level air expander, shaft displacement of a first- # N-1 clutch, misalignment of the first- # N-1 clutch, differential pressure of a lubricating oil filter and the like.
In an embodiment of the expansion power generation system for the compressed air energy storage power station, before the inter-stage reheating type air expansion power generation unit is started under a first-stage operation condition, the first clutch is placed in an unlocking state, meanwhile, in order to enable air inlet parameters of the first-stage air expansion machine to be quickly established, compressed air stored in the first-stage air storage chamber sequentially flows through an outlet isolation valve and a regulating valve of the first-stage air storage chamber, then enters an air side of the inter-stage reheating device for heat absorption, and then sequentially flows through a filter screen, a bypass regulating valve of the first-stage air expansion machine, a check valve and a silencer to be exhausted to the atmosphere after the heat absorption is completed; the unit starts the back, and is first the clutch is in the off-going state, because the first order the valve is transferred to the air expander bypass closes entirely, and compressed air changes and flows through the first order in proper order get into the first order behind air expander import trip valve, the transfer valve air expander inflation do work, and the exhaust of production is again through export pipeline check valve, silencer exhaust atmosphere, first order the rotor warp of air expander drive after the gear box reduction gear slows down the generator electricity generation.
In an embodiment of an expansion power generation system for a compressed air energy storage power station, before the inter-stage reheating type air expansion power generation unit is started under the Y-stage operation condition, the clutch of the first to the # Y-1 is placed in a locking state, the clutch of the # YSSS is placed in an unlocking state (the step is cancelled when Y = N), meanwhile, in order to enable air inlet parameters of the Y-stage air expander to be quickly established, compressed air stored in the Y-stage air storage chamber sequentially flows through an outlet isolation valve and a regulating valve of the Y-stage air storage chamber, then enters the air side of the Y-stage reheating device for heat absorption, and then sequentially flows through a filter screen, a bypass regulating valve of the Y-stage air expander, a check valve and a silencer to be exhausted into the atmosphere after the heat absorption is completed; after the unit is started, the clutch of the first to the clutch of the # Y-1 is in an engaged state, the clutch of the # Y is in a disengaged state (the step is cancelled when Y = N), compressed air enters the air expander of the Y stage after sequentially flowing through an inlet stop valve and a regulating valve of the air expander of the Y stage after passing through a bypass regulating valve of the air expander of the Y stage, the compressed air is expanded and does work, generated exhaust gas enters an air side of the reheater of the Y-first stage through an outlet pipeline check valve to repeat a reheating work-doing process of an operation condition of the Y-first stage, and a rotor of the air expander of the 1-Y stage drives the generator to generate power after being decelerated by a gearbox reducer.
In an embodiment of the expansion power generation system for the compressed air energy storage power station, after the inter-stage reheating type air expansion power generation unit is started, the high-temperature heat storage medium in the high-temperature heat storage medium tank sequentially flows through a first high-temperature heat storage medium pump inlet isolation valve and a filter screen, then enters a first high-temperature heat storage medium pump for pressurization, then enters an outlet main pipe of the first high-temperature heat storage medium pump and an outlet main pipe of a second high-temperature heat storage medium pump after passing through a first high-temperature heat storage medium pump outlet isolation valve; or the heat exchange medium flows through the second high-temperature heat storage medium pump inlet isolation valve and the filter screen in sequence, then enters the second high-temperature heat storage medium pump for pressurization, and then enters the first high-temperature heat storage medium pump outlet main pipe and the second high-temperature heat storage medium pump outlet main pipe after passing through the second high-temperature heat storage medium pump outlet isolation valve. The first and second high-temperature heat storage medium pumps can be mutually standby and can also run simultaneously. Under the W-stage operation condition, high-temperature heat storage media in the outlet main pipe respectively enter a heat storage medium side inlet pipeline of the 1 st-W-stage reheater, sequentially flow through a heat storage medium side inlet isolating valve, a regulating valve and a filter screen of the interstage reheater, respectively enter heat storage medium sides of the 1 st-W-stage reheater for heat release, respectively pass through the 1 st-W-stage reheater heat storage medium side outlet isolating valve and then enter the low-temperature heat storage medium tank; in one embodiment, when the outlet flow rate of the first or second high-temperature heat storage medium pump is smaller than the cavitation safety value, the high-temperature heat storage medium flows through the high-temperature heat storage medium pump recirculation isolation valve and the valve in sequence and then returns to the high-temperature heat storage medium tank, so as to maintain the minimum working flow rate of the first or second high-temperature heat storage medium pump.
In one embodiment of the expansion power generation system for the compressed air energy storage power station, the expansion power generation system further comprises a system step sequence control logic operation button, a standby high-temperature heat storage medium pump starting interlock button, a heat storage medium subsystem emptying and preheating completion button, a valve input automatic button, a frequency converter input automatic button, a clutch locking and unlocking button and the like.
In an embodiment of an expansion power generation system for a compressed air energy storage power station, the types of the air expanders are not limited, and the air expanders can be various turbine air expanders, various volumetric air expanders, or combinations of different types of air expanders, and a working medium can be air or wet air; the high-temperature heat storage medium pump is not limited in type, and can be various vane type pumps, various positive displacement pumps or other types of pumps, or a combination of different types of pumps; the high-temperature heat storage medium can be water, heat conduction oil, paraffin and other organic heat storage media, and can also be various molten salt and other inorganic heat storage media.
To further illustrate the present solution, the present application also provides a specific application example of an expansion power generation system for a compressed air energy storage power station, referring to fig. 2, the expansion power generation system mainly comprises:
(1) Interstage reheating type air expansion generator set: a first stage air expander 1, a second stage air expander 2, a third stage air expander 3 and a fourth stage air expander 4; a gear box reducer 5, a generator 6, a first clutch 7, a second clutch 8 and a third clutch 9, a first stage interstage reheater 10, a second stage interstage reheater 11, a third stage interstage reheater 12 and a fourth stage interstage reheater 13, a first stage air storage chamber 14, a second stage air storage chamber 15, a third stage air storage chamber 16 and a fourth stage air storage chamber 17, a first stage air storage chamber outlet regulating valve V1, a second stage air storage chamber outlet regulating valve V5, a third stage air storage chamber outlet regulating valve V9 and a fourth stage air storage chamber outlet regulating valve V13, a first stage air expander inlet cut-off valve V2, a second stage air expander inlet cut-off valve V6, a third stage air expander inlet cut-off valve V10 and a fourth stage air expander inlet cut-off valve V14, a first stage air expander inlet regulating valve V3, a second stage air expander inlet regulating valve V7, a third stage air expander inlet regulating valve V11 and a fourth stage air expander inlet regulating valve V15, a first stage air expander bypass modulating valve V4, a second stage air expander bypass modulating valve V8, a third stage air expander bypass modulating valve V12 and a fourth stage air expander bypass modulating valve V16, a first stage air expander seal air inlet isolating valve V17, a second stage air expander seal air inlet isolating valve V18, a third stage air expander seal air inlet isolating valve V19 and a fourth stage air expander seal air inlet isolating valve V20, a respective stage air expander isolation air inlet isolation master valve V21, a first stage air expander isolation air inlet isolating valve V22, a second stage air expander isolation air inlet isolating valve V23, a third stage air expander isolation air inlet isolating valve V24 and a fourth stage air expander isolation air inlet isolating valve V25, a first stage air storage chamber inlet isolating valve V56, a second stage air storage chamber inlet isolating valve V57, A third-stage air storage chamber inlet isolation valve V58, a fourth-stage air storage chamber inlet isolation valve V59, a first-stage air storage chamber outlet isolation valve V60, a second-stage air storage chamber outlet isolation valve V61, a third-stage air storage chamber outlet isolation valve V62, a fourth-stage air storage chamber outlet isolation valve V63, a first-stage air storage chamber air expander sealing air outlet isolation valve V64, a second-stage air storage chamber air expander sealing air outlet isolation valve V65, a third-stage air storage chamber air expander sealing air outlet isolation valve V63, a fourth-stage air storage chamber air expander sealing air outlet isolation valve V67, check valves, pressure reducing valves, pipelines, filter screens, silencers, thermal measurement points and the like.
(2) The heat storage medium subsystem: a first high temperature heat storage medium pump 30 and a second high temperature heat storage medium pump 31, a high temperature heat storage medium tank 32 and a low temperature heat storage medium tank 33, a first high temperature heat storage medium pump inlet isolation valve V28 and a second high temperature heat storage medium pump inlet isolation valve V30, a first high temperature heat storage medium pump outlet isolation valve V29 and a second high temperature heat storage medium pump outlet isolation valve V31, a high temperature heat storage medium pump recirculation isolation valve V32, a high temperature heat storage medium pump recirculation regulating valve V33, a first inter-stage reheater heat storage medium side inlet isolation valve V34, a second inter-stage reheater heat storage medium side inlet isolation valve V37, a third inter-stage reheater heat storage medium side inlet isolation valve V40 and a fourth inter-stage reheater heat storage medium side inlet isolation valve V43, a first inter-stage reheater heat storage medium side inlet regulating valve V35, a second inter-stage reheater heat storage medium side inlet regulating valve V38, a third inter-stage reheater heat storage medium side inlet regulating valve V41 and a third inter-stage reheater heat storage medium outlet isolation valve V44, a first inter-stage reheater heat storage medium outlet isolation valve V36, a third inter-stage reheater heat storage medium outlet isolation valve V42, a third inter-stage reheater heat storage medium outlet isolation valve V45, a third inter-stage reheater heat storage medium outlet isolation valve V36, a third stage reheater heat storage medium outlet isolation valve V42, a third stage reheater heat storage medium outlet isolation valve, a third stage reheater heat storage medium check valve, and a third stage reheater heat storage medium check valve V45.
Due to the uncertainty of renewable energy sources such as wind, light and the like, the electric energy input into the compressed air energy storage power station in the energy storage stage can fluctuate greatly and frequently and is influenced by the fluctuation, and the air compressor unit can also operate under a variable working condition in the energy storage stage. Therefore, according to different compressed air storage pressure grades in the energy storage stage, the air expansion machine and the interstage reheater grades in the expansion power generation system in the energy release stage are different in grade. In an application example of the expansion power generation system for the compressed air energy storage power station, an air compressor set at an energy storage stage of the compressed air energy storage power station consists of a first-stage air compressor 37, a second-stage air compressor 38, a third-stage air compressor 39 and a fourth-stage air compressor 40, so that the compressed air storage pressure levels at the energy storage stage can be four from 1 st to fourth stages, and therefore, the operation working conditions of the expansion power generation system at the energy release stage are respectively corresponding to the four from 1 st to fourth stages. Specifically, when the compressed air storage pressure level in the energy storage stage is the fourth stage, that is, the first stage air compressor 37, the second stage air compressor 38, the third stage air compressor 39 and the fourth stage air compressor 40 are operated in the energy storage stage, and all the generated compressed air is stored in the fourth stage air storage chamber 17, the air expander and the inter-stage reheater level in the energy release stage expansion power generation system are the fourth stage, and include the first stage air expander 1, the second stage air expander 2, the third stage air expander 3 and the fourth stage air expander 4, and the first stage reheater 10, the second stage reheater 11, the third stage reheater 12 and the fourth stage reheater 13, that is, the fourth stage operation condition; when the compressed air storage pressure grade in the energy storage stage is the third stage, namely the first stage air compressor 37, the second stage air compressor 38 and the third stage air compressor 39 are operated in the energy storage stage, and all the generated compressed air is stored in the third stage air storage chamber 16, the air expander and the inter-stage reheater grade operated in the expansion power generation system in the energy release stage are the third stage, including the first stage air expander 1, the second stage air expander 2 and the third stage air expander 3, and the first stage inter-stage reheater 10, the second stage inter-stage reheater 11 and the third stage inter-stage reheater 12 are operated together, namely the third stage operation condition; when the storage pressure level of the compressed air in the energy storage stage is the second level, namely the first-level air compressor 37 and the second-level air compressor 38 are operated in the energy storage stage, and all the generated compressed air is stored in the second-level air storage chamber 15, the levels of the air expander and the inter-level reheater operated in the energy release stage expansion power generation system are the second level, and comprise the first-level air expander 1 and the second-level air expander 2, and the first-level inter-level reheater 10 and the second-level inter-level reheater 11 are operated together, namely the second-level operation condition; when the storage pressure level of the compressed air in the energy storage stage is the first level, that is, the first-level air compressor 37 is operated in the energy storage stage, and all the generated compressed air is stored in the first-level air storage chamber 14, the levels of the air expander and the inter-level reheater operated in the expansion power generation system in the energy release stage are the first level, and include that the first-level air expander 1 and the first-level inter-level reheater 10 are operated together, that is, the first-level operation condition. Wherein the higher the number of stages of the air expander and the inter-stage reheater, the higher the operating pressure thereof.
In the application example of the expansion power generation system for the compressed air energy storage power station, the conventional lubricating oil system, the conventional factory cooling water system 29, the conventional nitrogen production system 34, the first conventional nitrogen sealing device 35 and the second conventional nitrogen sealing device 36 can provide various auxiliary working media meeting parameter requirements for the expansion power generation system. The conventional lubricating oil system, which can supply lubricating and cooling oil to the first stage air expander 1, the second stage air expander 2, the third stage air expander 3 and the fourth stage air expander 4, as well as the first clutch 7, the second clutch 8 and the third clutch 9, and the gear box reducer 5, mainly comprises: a lubricating oil tank 18, a first alternating-current lubricating oil pump 19, a second alternating-current lubricating oil pump 20 (one for one standby), a direct-current accident oil pump 21, an oil tank electric heater 22, a lubricating oil purifying device 23, a first oil fume exhaust fan 24, a second oil fume exhaust fan 25 (one for one standby), a lubricating oil filter 26 (duplex switchable), a lubricating oil cooler 27 (duplex switchable), an energy accumulator 28, a lubricating oil pressure regulating valve V54, a lubricating oil temperature regulating valve V55, check valves, pipelines, filter screens, thermal engineering measuring points and the like; the conventional plant cooling water system 29 can provide cooling water for the lubricating oil cooler 27, the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31, a first lubricating oil cooling water inlet isolation valve V46 and a second lubricating oil cooling water inlet isolation valve V48 are respectively arranged on two cooling water inlet pipelines of the lubricating oil cooler 27, a first lubricating oil cooling water outlet isolation valve V47 and a second lubricating oil cooling water outlet isolation valve V49 are respectively arranged on two cooling water outlet pipelines of the lubricating oil cooler 27, a first high-temperature heat storage medium pump cooling water inlet isolation valve V50 and a second high-temperature heat storage medium pump cooling water inlet isolation valve V52 are respectively arranged on a cooling water inlet pipeline of the first high-temperature heat storage medium pump 30 and a cooling water outlet isolation valve V51 and a second high-temperature heat storage medium pump cooling water outlet isolation valve V53 are respectively arranged on a cooling water outlet pipeline of the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31; the conventional nitrogen generating system 34 can provide a stable inflation air source for the first conventional nitrogen sealing device 35 and the second conventional nitrogen sealing device 36, and also provide a stable isolation air source for the first stage air expander 1, the second stage air expander 2, the third stage air expander 3 and the fourth stage air expander 4 for isolating air and lubricating oil; the first conventional nitrogen sealing device 35 and the second conventional nitrogen sealing device 36 can meet the requirement of the operating pressure of the high-temperature heat storage medium tank 32 and the low-temperature heat storage medium tank 33, and can isolate the heat storage medium from air to prolong the service life of the heat storage medium, and a first conventional nitrogen sealing device inlet isolation valve V26 and a second conventional nitrogen sealing device inlet isolation valve V27 are respectively arranged on inlet pipelines of the first conventional nitrogen sealing device 35 and the second conventional nitrogen sealing device 36.
In the interstage reheating type air expansion generating set, a first-stage air storage chamber 14, a second-stage air storage chamber 15, a third-stage air storage chamber 16 and a fourth-stage air storage chamber 17 are respectively used for storing high-pressure air discharged from outlets of a first-stage air compressor 37, a second-stage air compressor 38, a third-stage air compressor 39 and a fourth-stage air compressor 40; in the energy release stage, the first air storage chamber 14 provides high-pressure air for work and power generation for the first air expander 1 under the first-stage operation condition, the second air storage chamber 15 provides high-pressure air for work and power generation for the first air expander 1 and the second air expander 2 under the second-stage operation condition, the third air storage chamber 16 provides high-pressure air for work and power generation for the first air expander 1, the second air expander 2 and the third air expander 3 under the third-stage operation condition, and the fourth air storage chamber 17 provides high-pressure air for work and power generation for the first air expander 1, the second air expander 2, the third air expander 3 and the fourth air expander 4 under the fourth-stage operation condition.
A first-stage air storage chamber inlet isolating valve V56, a filter screen and a check valve are sequentially arranged on an inlet pipeline of a first-stage air storage chamber 14 led out by an outlet pipeline of a first-stage air compressor 37, a second-stage air storage chamber inlet isolating valve V57, a filter screen and a check valve are sequentially arranged on an inlet pipeline of a second-stage air storage chamber 15 led out by an outlet pipeline of a second-stage air compressor 38, a third-stage air storage chamber inlet isolating valve V58, a filter screen and a check valve are sequentially arranged on an inlet pipeline of a third-stage air storage chamber 16 led out by an outlet pipeline of a third-stage air compressor 39, a fourth-stage air storage chamber inlet isolating valve V59, a filter screen and a check valve are sequentially arranged on an inlet pipeline of a fourth-stage air storage chamber 17 led out by an outlet pipeline of a fourth-stage air compressor 40, the air storage chamber inlet isolating valve can isolate the air storage chamber from the air compressor in an energy storage stage to prevent the air compressor from influencing the operation of the air compressor, the air storage chamber, the filter screen is used for removing impurities contained in the high-pressure air compressor at the outlet of the air compressor, and the check valve can prevent the high-pressure air in the air storage chamber from flowing backwards into the air compressor.
A first-stage air storage chamber outlet isolation valve V60, a second-stage air storage chamber outlet isolation valve V61, a third-stage air storage chamber outlet isolation valve V62 and a fourth-stage air storage chamber outlet isolation valve V63 are respectively arranged on outlet pipelines of the first-stage air storage chamber 14, the second-stage air storage chamber 15, the third-stage air storage chamber 16 and the fourth-stage air storage chamber 17, and the air storage chambers can stop supplying air to the downstream direction by fully closing the air storage chamber outlet isolation valves. The first-stage air storage chamber outlet regulating valve V1, the second-stage air storage chamber outlet regulating valve V5, the third-stage air storage chamber outlet regulating valve V9 and the fourth-stage air storage chamber outlet regulating valve V13 are respectively arranged at the downstream of a first-stage air storage chamber outlet isolating valve V60, a second-stage air storage chamber outlet isolating valve V61, a third-stage air storage chamber outlet isolating valve V62 and a fourth-stage air storage chamber outlet isolating valve V63, and the air storage chamber outlet regulating valves are used for regulating the outlet air pressure of the interstage reheater. The first-stage interstage reheater 10, the second-stage interstage reheater 11, the third-stage interstage reheater 12 and the fourth-stage interstage reheater 13 are surface heat exchangers, the interiors of the surface heat exchangers are composed of an air side (temperature rise) and a heat storage medium side (temperature drop), the air side is arranged at the downstream of an outlet regulating valve of the air storage chamber, and a filter screen is arranged on an outlet pipeline of the air side and used for removing impurities contained in high-pressure air.
The downstream of the filter screen is divided into two paths, one path is an air expander inlet pipeline, a first-stage air expander inlet cut-off valve V2 and a first-stage air expander inlet adjusting valve V3 are sequentially arranged on a first-stage air expander 1 inlet pipeline, a second-stage air expander inlet cut-off valve V6 and a second-stage air expander inlet adjusting valve V7 are sequentially arranged on a second-stage air expander 2 inlet pipeline, a third-stage air expander inlet cut-off valve V10 and a third-stage air expander inlet adjusting valve V11 are sequentially arranged on a third-stage air expander 3 inlet pipeline, a fourth-stage air expander inlet cut-off valve V14 and a fourth-stage air expander inlet adjusting valve V15 are sequentially arranged on a fourth-stage air expander 4 inlet pipeline. In the accident or normal shutdown stage, the inlet cut-off valve of the air expansion machine is quickly and fully closed, and the air expansion machine can be stopped from continuously feeding air by adjusting the valve so as to prevent the influence on the normal idle running of the rotor; under the first-stage operating condition, the first-stage air expander inlet cut-off valve V2 is fully opened, and the first-stage air expander inlet regulating valve V3 is used for regulating the rotor speed-up and load lifting of the first-stage air expander 1; under the second-stage operation condition, the second-stage air expander inlet cutoff valve V6 is fully opened, the second-stage air expander inlet adjusting valve V7 is used for adjusting the rotor speed rise and load lifting of the first-stage air expander 1 and the second-stage air expander 2, and meanwhile, the first-stage air expander inlet cutoff valve V2 and the first-stage air expander inlet adjusting valve V3 are fully opened; under a third-stage operation condition, an inlet cutoff valve V10 of the third-stage air expander is fully opened, an inlet adjusting valve V11 of the third-stage air expander is used for adjusting the rotor speed rise and the load lift of the first-stage air expander 1, the second-stage air expander 2 and the third-stage air expander 3, and simultaneously, an inlet cutoff valve V2 of the first-stage air expander and an inlet cutoff valve V6 of the second-stage air expander, and an inlet adjusting valve V3 of the first-stage air expander and an inlet adjusting valve V7 of the second-stage air expander are fully opened; the fourth stage air expander inlet cut-off valve V14 is fully opened under the fourth stage operation condition, the fourth stage air expander inlet adjusting valve V15 is used for adjusting the speed rise and the load rise of the rotors of the first stage air expander 1, the second stage air expander 2, the third stage air expander 3 and the fourth stage air expander 4, and meanwhile, the first stage air expander inlet cut-off valve V2, the second stage air expander inlet cut-off valve V6 and the third stage air expander inlet cut-off valve V10, the first stage air expander inlet adjusting valve V3, the second stage air expander inlet adjusting valve V7 and the third stage air expander inlet adjusting valve V11 are fully opened.
Another way in filter screen low reaches is air expander bypass pipeline, first order air expander bypass accent valve V4 has been arranged in proper order on 1 bypass pipeline of first order air expander, the check valve, the silencer, second order air expander bypass accent valve V8 has been arranged in proper order on 2 bypass pipelines of second order air expander, the check valve, the silencer, third order air expander bypass accent valve V12 has been arranged in proper order on 3 bypass pipelines of third order air expander, the check valve, the silencer, fourth order air expander bypass accent valve V16 has been arranged in proper order on 4 bypass pipelines of fourth order air expander, the check valve, the silencer. The first stage bypass air expander adjusting valve V4 is used for quickly establishing air inlet parameters of the first stage air expander 1 before the inter-stage reheat type air expansion generator set is started under the first stage operation condition, the second stage bypass air expander adjusting valve V8 is used for quickly establishing air inlet parameters of the second stage air expander 2 and simultaneously the first stage bypass air expander adjusting valve V4 is fully closed before the inter-stage reheat type air expansion generator set is started under the second stage operation condition, the third stage bypass air expander adjusting valve V12 is used for quickly establishing air inlet parameters of the third stage air expander 3 and simultaneously the first stage bypass air expander adjusting valve V4 and the second stage bypass air expander adjusting valve V8 are fully closed before the inter-stage reheat type air expansion generator set is started under the third stage operation condition, before the reheating type air expansion generating set is started under the fourth-stage operation working condition, the fourth-stage air expansion machine bypass regulating valve V16 is used for quickly establishing the air inlet parameters of the fourth-stage air expansion machine 4, simultaneously, the first-stage air expansion machine bypass regulating valve V4, the second-stage air expansion machine bypass regulating valve V8 and the third-stage air expansion machine bypass regulating valve V12 are completely closed, and in an accident or normal shutdown stage, the quick full-opening air expansion machine bypass regulating valve can enable the front air pressure of the air expansion machine to be quickly released so as to prevent the shutdown of the generating set from being influenced by the poor tightness of an air expansion machine inlet cut-off valve and a regulating valve; the check valve can prevent the external atmosphere from flowing backwards; and the muffler with the outlet communicated with the outside atmosphere is used for relieving the exhaust noise of the bypass pipeline. And a check valve which can prevent downstream gas from flowing back to enter the air expander is arranged on the outlet pipeline of the air expander.
The air expander is provided with a sealing air pipeline, the sealing air pipeline is divided into an air storage chamber air supply sealing pipeline and a self-sealing pipeline according to different air sources, and in the early stage of starting and the idle running stopping stage of the interstage reheating type air expansion generator set, because the pressure of the self-sealing air source is too low and unstable, the sealing air source is provided by the air storage chamber; along with the unit start-up process goes on, self sealss air supply pressure is normal gradually, and sealed wind air supply passes through gradually to the self sealss by the reservoir and provides.
The air storage chamber air supply sealing pipeline consists of four air storage chamber leading-out pipelines and four air expansion machine air sealing distribution pipelines, a first-stage air storage chamber air sealing outlet isolation valve V64 is arranged on the first-stage air storage chamber 14 leading-out pipeline, a second-stage air storage chamber air sealing outlet isolation valve V65 is arranged on the second-stage air storage chamber 15 leading-out pipeline, a third-stage air storage chamber air sealing outlet isolation valve V66 is arranged on the third-stage air storage chamber 16 leading-out pipeline, a fourth-stage air storage chamber air sealing outlet isolation valve V67 is arranged on the fourth-stage air storage chamber 17 leading-out pipeline, the four air storage chambers lead-out pipelines are converged and then distributed to the first-stage air expansion machine 1, the second-stage air expansion machine 2, the third-stage air expansion machine 3 and the fourth-stage air expansion machine 4 through filter screens, during the starting or stopping of the expansion power generation system, the first stage air storage chamber is fully opened to provide the sealing air outlet isolation valve V64 of the air expander under the first stage operation condition, the other air storage chambers are fully closed to provide the sealing air outlet isolation valve of the air expander, the second stage air storage chamber is fully opened to provide the sealing air outlet isolation valve V65 of the air expander under the second stage operation condition, the other air storage chambers are fully closed to provide the sealing air outlet isolation valve of the air expander under the second stage air storage chamber 15, the third stage air storage chamber is fully opened to provide the sealing air outlet isolation valve V66 of the air expander under the third stage operation condition, the other air storage chambers are fully closed to provide the sealing air outlet isolation valve of the air expander under the third stage operation condition, the fourth stage air storage chamber is fully opened to provide the sealing air outlet isolation valve V67 of the air expander under the fourth stage operation condition, the other air storage chambers are fully closed to provide the sealing air outlet isolation valve of the air expander under the fourth stage air storage chamber 17, the check valve can prevent downstream gas from flowing back to enter the gas storage chamber, and the filter screen is used for removing impurities contained in the high-pressure air; a first-stage air expander sealing air inlet isolation valve V17, a pressure reducing valve and a check valve are sequentially arranged on a first-stage air expander 1 sealing air distribution pipeline, a second-stage air expander sealing air inlet isolation valve V18, a pressure reducing valve and a check valve are sequentially arranged on a second-stage air expander 2 sealing air distribution pipeline, a third-stage air expander sealing air inlet isolation valve V19, a pressure reducing valve and a check valve are sequentially arranged on a third-stage air expander 3 sealing air distribution pipeline, a fourth-stage air expander sealing air inlet isolation valve V20, a pressure reducing valve and a check valve are sequentially arranged on a fourth-stage air expander 4 sealing air distribution pipeline, a fully-closed air expander sealing air inlet isolation valve can cut off sealing air supply of the air expander from an air storage chamber, the pressure reducing valve is used for reducing the sealing air pressure from the air storage chamber to a first preset pressure so as to meet the sealing requirements of the air expander in the rotating speed increasing and low load stages, and the check valve can prevent downstream gas from flowing backwards.
The self-sealing pipeline is led out from a downstream pipeline of a first-stage air storage chamber outlet regulating valve V1, a second-stage air storage chamber outlet regulating valve V5, a third-stage air storage chamber outlet regulating valve V9 and a fourth-stage air storage chamber outlet regulating valve V13 respectively, a filter screen, a pressure reducing valve and a check valve are sequentially arranged on the self-sealing pipeline, an outlet of a sealing air distribution pipeline of the air expander is converged with an outlet of the self-sealing pipeline and then enters the air expander, the filter screen is used for removing impurities contained in high-pressure air, the pressure reducing valve is used for reducing the pressure of the sealing air after throttling of the air storage chamber outlet regulating valve to a second preset pressure so as to meet the self-sealing requirement of the air expander in a high-load stage (in one embodiment, specific values of the first preset pressure and the second preset pressure are determined by the level of the air expander, and the second preset pressure of any one stage of the air expander is slightly greater than the first preset pressure so that a sealing air source can be automatically switched from the air storage chamber to be self-sealing along with the rise of the downstream air pressure of the air storage chamber outlet regulating valve), and the check valve can prevent the downstream gas from flowing backwards.
The air expander is provided with an isolated air main pipeline and four branch pipelines, each stage of air expander isolated air inlet isolated main valve V21, a filter screen and a pressure reducing valve are sequentially arranged on the isolated air main pipeline, the isolated air inlet isolated main valve V21 of each stage of air expander can cut off the supply of the isolated air of the conventional nitrogen system 34 when the isolated air inlet isolated main valve V21 of each stage of air expander is completely closed, the filter screen is used for removing impurities contained in nitrogen, and the pressure reducing valve is used for reducing the pressure of the isolated air from the conventional nitrogen system 34 to a third preset pressure; a first-stage air expander isolation air inlet isolation valve V22 and a check valve are sequentially arranged on a first-stage air expander 1 isolation air branch pipeline, a second-stage air expander isolation air inlet isolation valve V23 and a check valve are sequentially arranged on a second-stage air expander 2 isolation air branch pipeline, a third-stage air expander isolation air inlet isolation valve V24 and a check valve are sequentially arranged on a third-stage air expander 3 isolation air branch pipeline, a fourth-stage air expander isolation air inlet isolation valve V25 and a check valve are sequentially arranged on a fourth-stage air expander 4 isolation air branch pipeline, the supply of isolation air to the air expander can be cut off by the fully-closed air expander isolation air inlet isolation valve, and the check valve can prevent downstream gas from flowing backwards.
The first stage air expander 1, the second stage air expander 2, the third stage air expander 3 and the fourth stage air expander 4 are coaxially arranged at the same rotating speed, a gear box reducer 5 is connected with a generator 6 through a coupler, the rated rotating speed of the rotor of the air expander is finally reduced to the rated rotating speed of the generator 6 through the gear box reducer 5, a first clutch 7 is arranged between the rotor of the first stage air expander 1 and the rotor of the second stage air expander 2, a second clutch 8 is arranged between the rotor of the second stage air expander 2 and the rotor of the third stage air expander 3, a third clutch 9 is arranged between the rotor of the third stage air expander 3 and the rotor of the fourth stage air expander 4, the number of the input operation air expander can be changed through clutch engagement and disengagement, the first clutch 7 is disengaged under the first stage operation condition, the second clutch 8 is disengaged under the second stage operation condition, the first clutch 7 is engaged, the third clutch 9 is disengaged, the second clutch 8 is engaged and the first clutch 7 is engaged under the third stage operation condition, the third clutch 9 is engaged, the second clutch 8 is engaged and the fourth stage clutch 7 is engaged under the fourth stage operation condition.
In the heat storage medium subsystem, the high-temperature heat storage medium tank 32 is used for storing the high-temperature heat storage medium after absorbing the compression heat in the energy storage stage for use in the energy release stage, the tank body is respectively connected with inlet pipelines of the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31, and simultaneously the inlet pressure requirements of the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31 can be met through the high-position arrangement mode of the tank body so as to prevent cavitation.
The first high-temperature heat storage medium pump 30 or the second high-temperature heat storage medium pump 31 can provide enough pressure head to enable the high-temperature heat storage medium to enter the first-stage inter-stage reheater 10, the second-stage inter-stage reheater 11, the third-stage inter-stage reheater 12 and the fourth-stage inter-stage reheater 13 to release heat at the heat storage medium side, the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31 are driven by a motor with a frequency converter, and the double-pump parallel arrangement mode can meet the requirements of equipment rotation and standby and the requirements of simultaneous use.
The inlet pipeline of the first high-temperature heat storage medium pump 30 is sequentially provided with a first high-temperature heat storage medium pump inlet isolating valve V28 and a filter screen, the inlet pipeline of the second high-temperature heat storage medium pump 31 is sequentially provided with a second high-temperature heat storage medium pump inlet isolating valve V30 and a filter screen, the high-temperature heat storage medium pump inlet isolating valve can be closed completely, the high-temperature heat storage medium pump can be stopped, meanwhile, the inflow of high-temperature heat storage medium is cut off, and the filter screen is used for removing impurities contained in the high-temperature heat storage medium.
The outlet pipeline of the first high-temperature heat storage medium pump 30 is sequentially provided with a check valve and a first high-temperature heat storage medium pump outlet isolation valve V29, the outlet pipeline of the second high-temperature heat storage medium pump 31 is sequentially provided with a check valve and a second high-temperature heat storage medium pump outlet isolation valve V31, the check valve can prevent the downstream high-temperature heat storage medium from flowing back to enter the high-temperature heat storage medium pump, and the high-temperature heat storage medium pump outlet isolation valve is fully closed to stop the high-temperature heat storage medium pump.
A high-temperature heat storage medium pump recirculation isolation valve V32 and a high-temperature heat storage medium pump recirculation adjusting valve V33 are sequentially arranged on a recirculation pipeline between the outlet main pipes of the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31 and the high-temperature heat storage medium tank 32, the high-temperature heat storage medium pump recirculation isolation valve V32 is fully opened, and the opening degree of the high-temperature heat storage medium pump recirculation adjusting valve V33 is adjusted to prevent the outlet flow of the first high-temperature heat storage medium pump 30 or the second high-temperature heat storage medium pump 31 from being smaller than a cavitation safety value.
The heat storage medium side inlet pipelines of a first-stage interstage reheater 10, a second-stage interstage reheater 11, a third-stage interstage reheater 12 and a fourth-stage interstage reheater 13 are connected with outlet main pipes of a first high-temperature heat storage medium pump 30 and a second high-temperature heat storage medium pump 31, the heat storage medium side inlet isolation valve V34 of the first-stage interstage reheater, the heat storage medium side inlet adjusting valve V35 of the first-stage interstage reheater and a filter screen are sequentially arranged on the heat storage medium side inlet pipeline of the first-stage interstage reheater 10, the heat storage medium side inlet adjusting valve V35 of the first-stage interstage reheater and the filter screen, the heat storage medium side inlet pipeline of the second-stage interstage reheater 11 is sequentially provided with a second-stage reheater heat storage medium side inlet isolation valve V37, a second-stage reheater heat storage medium side inlet adjusting valve V38 of the second-stage reheater and a filter screen, the heat storage medium side inlet isolation valve V40 of the second-stage reheater, a second-stage reheater heat storage medium side inlet adjusting valve V41 of the second-stage reheater and the filter screen are sequentially arranged on the heat storage medium side inlet pipeline of the third-stage reheater 12, a fourth-stage inter-stage reheater heat-storage medium side inlet isolation valve V43, a fourth-stage inter-stage reheater heat-storage medium side inlet adjusting valve V44 and a filter screen are sequentially arranged on a heat-storage medium side inlet pipeline of the fourth-stage inter-stage reheater 13, the heat-storage medium side outlet pipelines of the first-stage inter-stage reheater 10, the second-stage inter-stage reheater 11, the third-stage inter-stage reheater 12 and the fourth-stage inter-stage reheater 13 are converged and then enter the low-temperature heat-storage medium tank 33, a first-stage inter-stage reheater heat-storage medium side outlet isolation valve V36 is arranged on a heat-storage medium side outlet pipeline of the first-stage inter-stage reheater 10, a second-stage inter-stage reheater heat-storage medium side outlet isolation valve V39 is arranged on a heat-storage medium side outlet pipeline of the second-stage reheater 11, and a third-stage inter-stage reheater heat-storage medium side outlet isolation valve V42 is arranged on a heat-storage medium side outlet pipeline of the third-stage reheater 12, a fourth-stage inter-stage reheater heat storage medium side outlet isolation valve V45 is arranged on a fourth-stage inter-stage reheater 13 heat storage medium side outlet pipeline, the fully-closed inter-stage reheater heat storage medium side inlet isolation valve, the inlet adjusting valve and the outlet isolation valve can enable the inter-stage reheater to be shut down, the inter-stage reheater heat storage medium side inlet adjusting valve can also adjust the inlet air temperature of the air expander, the filter screen is used for removing impurities contained in the high-temperature heat storage medium, and the low-temperature heat storage medium tank 33 is used for storing the low-temperature heat storage medium after heat release to be used in the energy storage stage.
As shown in fig. 2, necessary related thermal measurement points are also arranged in the expansion power generation system of the embodiment of the present application. The thermal measurement points can be, for example, pressure measurement points, differential pressure measurement points, temperature measurement points, liquid level measurement points, flow measurement points, rotational speed measurement points, vibration measurement points, axis displacement measurement points, axis misalignment measurement points, and the like.
In an application example of an expansion power generation system for a compressed air energy storage power station, before an interstage reheating type air expansion power generation unit is started under a first-stage operation working condition, a first clutch 7 is placed in an unlocking state, meanwhile, in order to enable air inlet parameters of a first-stage air expander 1 to be rapidly established, compressed air stored in a first-stage air storage chamber 14 sequentially flows through a first-stage air storage chamber outlet isolation valve V60 and a regulating valve V1 and then enters an air side of a first-stage reheater 10 to absorb heat, and after heat absorption is finished, the compressed air sequentially flows through a filter screen, a first-stage air expander bypass regulating valve V4, a check valve and a silencer and is exhausted into the atmosphere; after the unit is started, the first clutch 7 is in a disengaged state, compressed air enters the first-stage air expander 1 for expansion and work after sequentially flowing through the first-stage air expander inlet cutoff valve V2 and the first-stage air expander inlet adjusting valve V3 due to the fact that the first-stage air expander bypass adjusting valve V4 is fully closed, generated exhaust gas is exhausted into the atmosphere through the outlet pipeline check valve and the silencer, and a rotor of the first-stage air expander 1 drives the generator 6 to generate power after being decelerated by the gear box reducer 5.
In an application example of an expansion power generation system for a compressed air energy storage power station, before an interstage reheated air expansion power generation unit is started under a second-stage operation working condition, a first clutch 7 is placed in a locking state, a second clutch 8 is placed in an unlocking state, meanwhile, in order to quickly establish air inlet parameters of a second-stage air expander 2, compressed air stored in a second-stage air storage chamber 15 sequentially flows through a second-stage air storage chamber outlet isolation valve V61 and a second-stage air storage chamber outlet regulating valve V5, then enters an air side of a second-stage interstage device 11 to absorb heat, and after heat absorption is completed, sequentially flows through a filter screen, a second-stage air expander bypass regulating valve V8, a check valve and a silencer and is exhausted into the atmosphere; after the unit is started, the first clutch 7 is in an engaged state, the second clutch 8 is in a disengaged state, compressed air flows through the second-stage air expander inlet stop valve V6 and the second-stage air expander inlet adjustment valve V7 in sequence and then enters the second-stage air expander 2 to do work through expansion due to the fact that the second-stage air expander bypass adjustment valve V8 is fully closed, generated exhaust air enters the air side of the first-stage inter-stage reheater 10 through the outlet pipeline check valve to repeat the reheating work-doing process of the first-stage operation working condition, and rotors of the first-stage air expander 1 and the second-stage air expander 2 drive the generator 6 to generate electricity after being decelerated through the gear box reducer 5.
In an application example of an expansion power generation system for a compressed air energy storage power station, before a reheated air expansion power generation unit between a third-stage operation working condition and a lower-stage is started, a first clutch 7 and a second clutch 8 are placed in a locking state, a third clutch 9 is placed in an unlocking state, meanwhile, in order to enable air inlet parameters of a third-stage air expander 3 to be rapidly established, compressed air stored in a third-stage air storage chamber 16 sequentially flows through a third-stage air storage chamber outlet isolation valve V62 and a third-stage air storage chamber outlet regulating valve V9, then enters an air side of a third-stage reheater 12 to absorb heat, and after heat absorption is finished, the compressed air sequentially flows through a filter screen, a third-stage air expander bypass regulating valve V12, a check valve and a silencer and then is exhausted into the atmosphere; after the unit is started, the first clutch 7 and the second clutch 8 are in an engaged state, the third clutch 9 is in a disengaged state, compressed air enters the third-stage air expander 3 for expansion work after sequentially flowing through a third-stage air expander inlet cutoff valve V10 and a third-stage air expander inlet adjustment valve V11 due to the fact that a third-stage air expander bypass adjustment valve V12 is fully closed, generated exhaust gas enters the second-stage interstage reheater 11 through an outlet pipeline check valve to repeat the reheating work process of the second-stage operation condition, and rotors of the first-stage air expander 1, the second-stage air expander 2 and the third-stage air expander 3 drive the generator 6 to generate electricity after being decelerated by the gear box reducer 5.
In an application example of an expansion power generation system for a compressed air energy storage power station, before a reheated air expansion power generation unit between a fourth-stage operation working condition and a lower stage is started, a first clutch 7, a second clutch 8 and a third clutch 9 are placed in a locking state, meanwhile, in order to quickly establish air inlet parameters of a fourth-stage air expander 4, compressed air stored in a fourth-stage air storage chamber 17 sequentially flows through a fourth-stage air storage chamber outlet isolation valve V63 and a fourth-stage air storage chamber outlet regulating valve V13 and then enters an air side of a fourth-stage reheater 13 to absorb heat, and after heat absorption is finished, the compressed air sequentially flows through a filter screen, a fourth-stage air expander bypass regulating valve V16, a check valve and a silencer and then is exhausted to the atmosphere; after the unit is started, the first clutch 7, the second clutch 8 and the third clutch 9 are in a meshing state, compressed air enters the fourth-stage air expander 4 for expansion work after sequentially flowing through a fourth-stage air expander inlet cutoff valve V14 and a fourth-stage air expander inlet adjustment valve V15 due to the fact that a fourth-stage air expander bypass adjustment valve V16 is fully closed, generated exhaust air enters the third-stage interstage reheater 12 through an outlet pipeline check valve to repeat the reheating work process of the third-stage operation working condition, rotors of the first-stage air expander 1, the second-stage air expander 2, the third-stage air expander 3 and the fourth-stage air expander 4 decelerate through a gear box reducer 5 and then drive the generator 6 to generate electricity.
In an application example of an expansion power generation system for a compressed air energy storage power station, after an interstage reheating type air expansion power generation unit is started, high-temperature heat storage media in a high-temperature heat storage medium tank 32 sequentially flow through a first high-temperature heat storage medium pump inlet isolation valve V28 and a filter screen, then enter a first high-temperature heat storage medium pump 30 to be pressurized, and then enter a first high-temperature heat storage medium pump 30 and a second high-temperature heat storage medium pump 31 outlet main pipe after passing through a first high-temperature heat storage medium pump outlet isolation valve V29; or the heat exchange medium flows through the second high-temperature heat storage medium pump inlet isolation valve V30 and the filter screen in sequence, enters the second high-temperature heat storage medium pump 31 for pressurization, then enters the first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31 outlet main pipe after passing through the second high-temperature heat storage medium pump outlet isolation valve V31. The first high-temperature heat storage medium pump 30 and the second high-temperature heat storage medium pump 31 may be standby for each other, or may operate simultaneously. Under the first-stage operation condition, the high-temperature heat storage medium in the outlet main pipe sequentially flows through a first-stage inter-stage reheater heat storage medium side inlet isolation valve V34, a first-stage inter-stage reheater heat storage medium side inlet adjusting valve V35 and a filter screen, then enters a first-stage inter-stage reheater 10 heat storage medium side for heat release, then enters a low-temperature heat storage medium tank 33 through a first-stage inter-stage reheater heat storage medium side outlet isolation valve V36; under the second-stage operation condition, the high-temperature heat storage medium in the outlet main pipe not only keeps the flow path of the first-stage operation condition, but also sequentially flows through a second-stage inter-stage reheater heat storage medium side inlet isolation valve V37, a second-stage inter-stage reheater heat storage medium side inlet adjusting valve V38 and a filter screen, enters the heat storage medium side of the second-stage inter-stage reheater 11 for heat release, then enters the low-temperature heat storage medium tank 33 through a second-stage inter-stage reheater heat storage medium side outlet isolation valve V39; under the third-stage operation condition, the high-temperature heat storage medium in the outlet main pipe sequentially flows through a third-stage inter-stage reheater heat storage medium side inlet isolation valve V40, a third-stage inter-stage reheater heat storage medium side inlet adjusting valve V41 and a filter screen, enters the heat storage medium side of the third-stage inter-stage reheater 12 for heat release, then enters the low-temperature heat storage medium tank 33 through a third-stage inter-stage reheater heat storage medium side outlet isolation valve V42 and then enters the second-stage operation condition flow path; under the fourth-stage operation working condition, the high-temperature heat storage medium in the outlet main pipe sequentially flows through a fourth-stage inter-stage reheater heat storage medium side inlet isolation valve V43, a fourth-stage inter-stage reheater heat storage medium side inlet adjusting valve V44 and a filter screen, then enters the heat storage medium side of the fourth-stage reheater 13 to release heat, then enters the low-temperature heat storage medium tank 33 through a fourth-stage inter-stage reheater heat storage medium side outlet isolation valve V45; in one embodiment, when the outlet flow of the first high temperature heat storage medium pump 30 or the second high temperature heat storage medium pump 31 is smaller than the cavitation safety value, the high temperature heat storage medium flows through the high temperature heat storage medium pump recirculation isolation valve V32 and the high temperature heat storage medium pump recirculation regulating valve V33 in sequence and then returns to the high temperature heat storage medium tank 32 to maintain the minimum working flow of the first high temperature heat storage medium pump 30 or the second high temperature heat storage medium pump 31.
In an application example of the expansion power generation system for the compressed air energy storage power station, the expansion power generation system further comprises a system step sequence control logic operation button, a standby high-temperature heat storage medium pump starting interlocking button, a heat storage medium subsystem emptying and preheating completion button, a valve input automatic button, a frequency converter input automatic button, a clutch locking and unlocking button and the like. The above-mentioned buttons may be provided, for example, on a control panel of the distributed control system. The system step sequence control logic operation button is used for controlling the expansion power generation system to start and stop; the equipment can be automatically put into interlocking by using an interlocking button of the starting standby high-temperature heat storage medium pump, after the interlocking is put into operation, if one equipment trips, the other equipment can be quickly started in an interlocking manner to maintain the normal operation of the expansion power generation system, for example, after the interlocking button of the starting standby high-temperature heat storage medium pump is pressed down, if the first high-temperature heat storage medium pump 30 trips, the second high-temperature heat storage medium pump 31 can be quickly started in an interlocking manner; the emptying and preheating completion button of the heat storage medium subsystem is used for being pressed when emptying and preheating operations are completed so as to carry out the next sequence; the valve input automatic button is used for automatically controlling the opening change of the valve so as to meet the change requirement of a certain physical quantity; the frequency converter input automatic button is used for automatically controlling the frequency change of the frequency converter so as to meet the change requirement of a certain physical quantity; the clutch locking and unlocking buttons are used for performing clutch locking and unlocking operations respectively.
In the application example of the expansion power generation system for the compressed air energy storage power station, the type of the air expander is not limited, the air expander can be various turbine type air expanders, various volume type air expanders or the combination of different types of air expanders, and the working medium can be air or wet air; the high-temperature heat storage medium pump is not limited in type, and can be various vane type pumps, various positive displacement pumps or other types of pumps, or a combination of different types of pumps; the high-temperature heat storage medium can be water, heat conduction oil, paraffin and other organic heat storage media, and can also be various molten salt and other inorganic heat storage media.
In order to improve the operation stability of the expansion power generation process of the compressed air energy storage power station and effectively improve the operation safety and stability of each relevant device while effectively improving the expansion power generation efficiency, the application provides an embodiment of an operation control method for an expansion power generation system of a compressed air energy storage power station, which is used for controlling the expansion power generation system of a compressed air energy storage power station provided by the application, and referring to fig. 3, the operation control method for the expansion power generation system of a compressed air energy storage power station specifically comprises the following contents:
Step 1000: and if it is determined that the inter-stage reheating type air expansion generator set and the heat storage medium subsystem operate normally, performing starting pretreatment on the heat storage medium subsystem and the inter-stage reheating type air expansion generator set.
Step 2000: selecting at least one corresponding interstage reheating type air expansion generator set as a current target control object according to a target operation condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that a single current control object meets a starting condition of the interstage reheating type air expansion generator set, wherein the starting control process of the expansion power generation of the target control object comprises the following steps: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; and controlling the target control object to execute a grid connection and initial load warming process, and controlling the target control object degree load to continuously increase to a rated load so as to complete the starting process of the expansion power generation corresponding to the target control object.
As can be seen from the above description, the operation control method of the expansion power generation system for a compressed air energy storage power station provided in the embodiments of the present application, on the basis of ensuring the operation efficiency of the whole compressed air energy storage power station by providing the inter-stage reheating type air expansion generator set and the heat storage medium subsystem, by controllably connecting the air expanders in series, the sets of reheating air storage assemblies are connected in parallel, each reheating air storage assembly includes an inter-stage reheater and an air storage chamber connection which are sequentially connected with the corresponding air expander; each air storage chamber is respectively connected with each air compressor in the compressed air energy storage power station in the energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem, so that when the air storage chamber is operated under variable working conditions in the energy storage stage to change the grade, each air expander of the inter-stage reheating type air expansion power generator set of the energy release stage expansion power generation system can stably operate near a rated working condition point, and the operation stability of the expansion power generation process of the compressed air energy storage power station can be effectively improved; the expansion power generation efficiency can be effectively improved, the operation efficiency of the whole compressed air energy storage power station can be effectively improved, the operation safety and stability of each relevant device can be effectively improved while the operation efficiency of a unit, a system and the whole compressed air energy storage power station is improved, and the safe and stable operation of each relevant device can be ensured; and the operation reliability of the expansion power generation process of the compressed air energy storage power station can be effectively improved, and the operation reliability of the whole compressed air energy storage power station can be further effectively improved.
In one embodiment of the method for generating power by expansion of a compressed air energy storage power station, in order to improve the effectiveness and reliability of the control, the air compressor in the compressed air energy storage power station comprises: a first stage air compressor, a second stage air compressor, a third stage air compressor and a fourth stage air compressor; correspondingly, the interstage reheated air expansion generator set comprises: the system comprises a first inter-stage reheating type air expansion generator set, a second inter-stage reheating type air expansion generator set, a third inter-stage reheating type air expansion generator set and a fourth inter-stage reheating type air expansion generator set; the first interstage reheat air expansion genset includes: a first stage air expander connected to the first stage air compressor via a first stage inter-stage reheater and a first stage air receiver connected in series; the second interstage reheat air expansion genset includes: a second stage air expander connected to the second stage air compressor via a second stage inter-stage reheater and a second stage air receiver connected in series; the inter-third stage reheat air expansion generator set includes: a third stage air expander connected to the third stage air compressor via a third stage interstage reheater and a third stage air receiver connected in series; the fourth interstage reheat air expansion generator set includes: a fourth stage air expander connected to the fourth stage air compressor via a fourth stage inter-stage reheater and a fourth stage air receiver connected in series; the first-stage air expander, the second-stage air expander, the third-stage air expander and the fourth-stage air expander are sequentially connected; a first clutch is arranged between the first-stage air expander and the second-stage air expander; a second clutch is arranged between the second-stage air expander and the third-stage air expander; a third clutch is arranged between the third-stage air expander and the fourth-stage air expander; the first-stage air expander is connected with one end of a gear box reducer, and the other end of the gear box reducer is connected to a generator; the heat storage medium subsystem comprises a first high-temperature heat storage medium pump, a second high-temperature heat storage medium pump, a high-temperature heat storage medium tank and a low-temperature heat storage medium tank; the expansion power generation system further includes: a conventional lubricating oil system and a conventional service cooling water system; the conventional lubricating oil system includes: the lubricating oil system comprises a lubricating oil tank, a first alternating-current lubricating oil pump, a second alternating-current lubricating oil pump, a direct-current emergency oil pump and an oil tank electric heater, wherein the first alternating-current lubricating oil pump, the second alternating-current lubricating oil pump and the direct-current emergency oil pump are respectively arranged in the lubricating oil tank; the conventional lubricating oil system further comprises: the lubricating oil purifying device is connected with the lubricating oil tank and used for purifying lubricating oil in the lubricating oil tank, and the first oil fume exhaust fan and the second oil fume exhaust fan are respectively connected with the lubricating oil tank; the conventional lubricating oil system further includes: the lubricating oil filter, the lubricating oil cooler and the energy accumulator are respectively connected with the lubricating oil tank; the lubricating oil filter is connected with the lubricating oil cooler, and the lubricating oil cooler is respectively connected to the first-stage air expander, the second-stage air expander, the third-stage air expander, the fourth-stage air expander, the first clutch, the second clutch, the third clutch and the gearbox reducer through a lubricating oil pressure regulating valve; the lubricating oil pressure regulating valve, the lubricating oil tank and the lubricating oil cooler are all connected to a lubricating oil temperature regulating valve; the conventional factory cooling water system is respectively connected with the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump; a first lubricating oil cooling water inlet isolating valve is arranged on a connecting pipeline between the conventional plant cooling water system and a first cooling water inlet of the lubricating oil cooler, and a first lubricating oil cooling water outlet isolating valve is arranged on a connecting pipeline between the conventional plant cooling water system and a first cooling water outlet of the lubricating oil cooler; a second lubricating oil cooling water inlet isolation valve is arranged on a connecting pipeline between the conventional plant cooling water system and a second cooling water inlet of the lubricating oil cooler, and a second lubricating oil cooling water outlet isolation valve is arranged on a connecting pipeline between the conventional plant cooling water system and a second cooling water outlet of the lubricating oil cooler;
The first stage air compressor is connected to the first stage air receiver via a first stage air receiver inlet isolation valve; the first-stage air storage chamber is connected to the first-stage inter-stage reheater through a first-stage air storage chamber outlet isolation valve and a first-stage air storage chamber outlet adjusting valve which are sequentially connected; the first-stage interstage reheater is connected to the first-stage air expander through a first-stage air expander inlet cut-off valve and a first-stage air expander inlet adjusting valve which are connected in sequence; the first-stage inter-stage reheater is further connected to the heat storage medium subsystem through a first-stage inter-stage reheater heat storage medium side inlet adjusting valve and a first-stage inter-stage reheater heat storage medium side inlet isolation valve which are sequentially connected; the first-stage air expander is connected with a silencer, and a first-stage air expander bypass adjusting valve is arranged between the first-stage inter-stage reheater and the first-stage inter-stage reheater heat storage medium side inlet adjusting valve and is connected to the silencer corresponding to the first-stage air expander; the second stage air compressor is connected to the second stage air reservoir via a second stage air reservoir inlet isolation valve; the second-stage air storage chamber is connected to the second-stage inter-stage reheater through a second-stage air storage chamber outlet isolation valve and a second-stage air storage chamber outlet adjusting valve which are sequentially connected; the second-stage interstage reheater is connected to the second-stage air expander through a second-stage air expander inlet cutoff valve and a second-stage air expander inlet adjusting valve which are connected in sequence; the second-stage inter-stage reheater is further connected to the heat storage medium subsystem via a second-stage inter-stage reheater heat storage medium side inlet adjusting valve and a second-stage inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence; the second-stage air expander is connected with a silencer, and a second-stage air expander bypass adjusting valve is arranged between the second-stage inter-stage reheater and the second-stage inter-stage reheater heat storage medium side inlet adjusting valve and is connected to the silencer corresponding to the second-stage air expander; the third stage air compressor is connected to the third stage air reservoir via a third stage air reservoir inlet isolation valve; the third-stage air storage chamber is connected to the third-stage interstage reheater through a third-stage air storage chamber outlet isolation valve and a third-stage air storage chamber outlet adjusting valve which are sequentially connected; the third-stage interstage reheater is connected to a third-stage air expander through a third-stage air expander inlet cut-off valve and a third-stage air expander inlet adjusting valve which are connected in sequence; the third-stage inter-stage reheater is also connected to the heat storage medium subsystem through a third-stage inter-stage reheater heat storage medium side inlet adjusting valve and a third-stage inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence; the third-stage air expander is connected with a silencer, a third-stage air expander bypass adjusting valve is arranged between the third-stage interstage reheater and the third-stage interstage reheater heat storage medium side inlet adjusting valve, and the third-stage air expander bypass adjusting valve is connected to the silencer corresponding to the third-stage air expander; said fourth stage air compressor connected to said fourth stage air reservoir via a fourth stage air reservoir inlet isolation valve; the fourth air reservoir is connected to the fourth interstage reheater through a fourth air reservoir outlet isolation valve and a fourth air reservoir outlet regulating valve which are connected in sequence; the fourth stage inter-stage reheater is connected to a fourth stage air expander through a fourth stage air expander inlet cut-off valve and a fourth stage air expander inlet adjusting valve which are connected in sequence; the fourth inter-stage reheater is further connected to the heat storage medium subsystem via a fourth inter-stage reheater heat storage medium side inlet trim valve and a fourth inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence; the fourth-stage air expander is connected with a silencer, and a fourth-stage air expander bypass adjusting valve is arranged between the fourth-stage inter-stage reheater and the heat storage medium side inlet adjusting valve of the fourth-stage inter-stage reheater and connected to the silencer corresponding to the fourth-stage air expander; the expansion power generation system for a compressed air energy storage power station further comprises: the first stage air expander isolation air inlet isolation valve, the second stage air expander isolation air inlet isolation valve, the third stage air expander isolation air inlet isolation valve and the fourth stage air expander isolation air inlet isolation valve are respectively connected with the isolation air inlet isolation main valve of each stage of air expander in parallel; the first stage air expander isolation wind inlet isolation valve is connected to a conduit between the first clutch and the first stage air expander; the second stage air expander isolation wind inlet isolation valve is connected to a conduit between the first clutch and the second stage air expander; the third stage air expander isolation wind inlet isolation valve is connected to a conduit between the third clutch and the third stage air expander; the fourth stage air expander isolation wind inlet isolation valve is connected to the conduit between the third clutch and the fourth stage air expander; the expansion power generation system for a compressed air energy storage power station further comprises: the system comprises a first-stage air expander sealed air inlet isolation valve, a second-stage air expander sealed air inlet isolation valve, a third-stage air expander sealed air inlet isolation valve and a fourth-stage air expander sealed air inlet isolation valve which are connected in parallel; the first stage air expander seal wind inlet isolation valve is connected to a conduit between the first clutch and the first stage air expander; the second stage air expander seal air inlet isolation valve is connected to the conduit between the first clutch and the second stage air expander; the third stage air expander seal wind inlet isolation valve is connected to a conduit between the third clutch and the third stage air expander; the fourth stage air expander seal wind inlet isolation valve is connected to the conduit between the third clutch and the fourth stage air expander; the expansion power generation system for a compressed air energy storage power station further comprises: the first-stage air storage chamber air supply expander sealing air outlet isolation valve, the second-stage air storage chamber air supply expander sealing air outlet isolation valve, the third-stage air storage chamber air supply expander sealing air outlet isolation valve and the fourth-stage air storage chamber air supply expander sealing air outlet isolation valve are connected in parallel; the first-stage air storage chamber is used for connecting a sealing air outlet isolation valve of the air expansion machine with the first-stage air storage chamber; the second-stage air storage chamber is used for connecting the air expander sealing air outlet isolation valve with the second-stage air storage chamber; the third-stage air storage chamber is used for connecting the air expander sealing air outlet isolation valve with the third-stage air storage chamber; the fourth-stage air storage chamber is used for connecting the air expander sealing air outlet isolation valve with the fourth-stage air storage chamber; the expansion power generation system for a compressed air energy storage power station further comprises: a first-stage inter-stage reheater heat storage medium side outlet isolation valve, a second-stage inter-stage reheater heat storage medium side outlet isolation valve, a third-stage inter-stage reheater heat storage medium side outlet isolation valve and a fourth-stage inter-stage reheater heat storage medium side outlet isolation valve are connected in parallel; the first stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the first stage inter-stage reheater; the second-stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the second-stage inter-stage reheater; the third-stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the third-stage inter-stage reheater; the fourth inter-stage reheater heat storage medium side outlet isolation valve is connected with the fourth inter-stage reheater; a first high-temperature heat storage medium pump inlet isolating valve is arranged between the first high-temperature heat storage medium pump and the high-temperature heat storage medium tank, and a second high-temperature heat storage medium pump inlet isolating valve is arranged between the second high-temperature heat storage medium pump and the high-temperature heat storage medium tank; the first high-temperature heat storage medium pump is connected to the inlet sides of the first stage inter-stage reheater, the second stage inter-stage reheater, the third stage inter-stage reheater and the fourth stage inter-stage reheater through a first high-temperature heat storage medium pump outlet isolation valve; the second high-temperature heat storage medium pump is connected to the inlet sides of the first-stage inter-stage reheater, the second-stage inter-stage reheater, the third-stage inter-stage reheater and the fourth-stage inter-stage reheater through a second high-temperature heat storage medium pump outlet isolation valve; a high-temperature heat storage medium pump recirculation regulating valve and a high-temperature heat storage medium pump recirculation isolating valve are sequentially connected between the high-temperature heat storage medium tank and the first high-temperature heat storage medium pump outlet isolating valve; a first high-temperature heat storage medium pump cooling water inlet isolating valve is connected between the conventional plant cooling water system and the inlet side of the first high-temperature heat storage medium pump, and a second high-temperature heat storage medium pump cooling water inlet isolating valve is connected between the conventional plant cooling water system and the inlet side of the second high-temperature heat storage medium pump; and a first high-temperature heat storage medium pump cooling water outlet isolating valve is connected between the conventional factory cooling water system and the outlet side of the first high-temperature heat storage medium pump, and a second high-temperature heat storage medium pump cooling water outlet isolating valve is connected between the conventional factory cooling water system and the outlet side of the second high-temperature heat storage medium pump.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, before step 1000, the following is further specifically included:
step 101, judging whether the current state of the expansion power generation system completely meets all conditions in a first condition group, and if not, executing step 102;
wherein each condition in the first set of conditions comprises:
1) The first stage air compressor, the second stage air compressor, the third stage air compressor and the fourth stage air compressor are shut down;
2) The first stage air storage chamber outlet regulating valve, the second stage air storage chamber outlet regulating valve, the third stage air storage chamber outlet regulating valve, the fourth stage air storage chamber outlet regulating valve, the first stage air expander sealing air inlet isolating valve, the second stage air expander sealing air inlet isolating valve, the third stage air expander sealing air inlet isolating valve, the fourth stage air expander sealing air inlet isolating valve, the first stage air storage chamber inlet isolating valve, the second stage air storage chamber inlet isolating valve, the third stage air storage chamber inlet isolating valve, the fourth stage air storage chamber inlet isolating valve, the first stage air storage chamber outlet isolating valve, the second stage air storage chamber outlet isolating valve, the third stage air storage chamber outlet isolating valve, the fourth stage air storage chamber outlet isolating valve, the first stage air storage chamber air expander sealing air outlet isolating valve, the second stage air storage chamber air expander sealing air outlet isolating valve, the third stage air storage chamber air expander sealing air outlet isolating valve and the fourth stage air storage chamber air expander sealing air outlet isolating valve are all in a closed state;
3) The pressure of the first-stage gas storage chamber, the pressure of the second-stage gas storage chamber, the pressure of the third-stage gas storage chamber, the pressure of the fourth-stage gas storage chamber, the gas storage temperature of the first-stage gas storage chamber, the gas storage temperature of the second-stage gas storage chamber, the gas storage temperature of the third-stage gas storage chamber and the gas storage temperature of the fourth-stage gas storage chamber all meet the requirements of respective corresponding preset normal states;
4) The liquid level of the lubricating oil tank meets the corresponding preset normal state requirement;
5) The air supply pressure of the conventional nitrogen making system meets the corresponding preset normal state requirement;
6) All the isolation air inlet main valves of all stages of air expanders, the isolation air inlet isolation valves of the first stage of air expander, the isolation air inlet isolation valves of the second stage of air expanders, the isolation air inlet isolation valves of the third stage of air expanders and the isolation air inlet isolation valves of the fourth stage of air expanders are in an open state;
7) The first conventional nitrogen sealing device inlet isolation valve and the second conventional nitrogen sealing device inlet isolation valve are both in an open state;
8) The air supply pressure of the isolation air of the first-stage air expander, the air supply pressure of the isolation air of the second-stage air expander, the air supply pressure of the isolation air of the third-stage air expander and the air supply pressure of the isolation air of the fourth-stage air expander meet the corresponding preset normal state requirements;
9) The liquid level of the high-temperature heat storage medium tank, the liquid level of the low-temperature heat storage medium tank, the pressure of the high-temperature heat storage medium tank and the pressure of the low-temperature heat storage medium tank all meet the corresponding preset normal state requirements;
10 The water supply pressure and the water supply temperature of the conventional factory cooling water system meet the corresponding preset normal state requirements;
11 A first lubricating oil cooling water inlet isolation valve, a second lubricating oil cooling water inlet isolation valve, a first lubricating oil cooling water outlet isolation valve, a second lubricating oil cooling water outlet isolation valve, a first high-temperature heat storage medium pump cooling water inlet isolation valve, a first high-temperature heat storage medium pump cooling water outlet isolation valve, a second high-temperature heat storage medium pump cooling water inlet isolation valve, and a second high-temperature heat storage medium pump cooling water outlet isolation valve are all in an open state;
102, sending out an instruction for stopping the operation of the first-stage air compressor, the second-stage air compressor, the third-stage air compressor and the fourth-stage air compressor, sending out an instruction for fully closing the first-stage air storage chamber outlet regulating valve, the second-stage air storage chamber outlet regulating valve, the third-stage air storage chamber outlet regulating valve and the fourth-stage air storage chamber outlet regulating valve, sending out an instruction for fully closing the first-stage air expander sealing air inlet isolating valve, the second-stage air expander sealing air inlet isolating valve, the third-stage air expander sealing air inlet isolating valve and the fourth-stage air expander sealing air inlet isolating valve, sending out an instruction for fully closing the first-stage air storage chamber inlet isolating valve, the second-stage air storage chamber inlet isolating valve, the third-stage air storage chamber inlet isolating valve and the fourth-stage air storage chamber inlet isolating valve, and sending out an instruction for fully closing the first-stage air storage chamber outlet isolating valve, the second-stage air storage chamber outlet isolating valve, the third-stage air storage chamber outlet isolating valve and the fourth-stage air storage chamber outlet isolating valve, sending an instruction for fully closing a first-stage air storage chamber air expander sealing air outlet isolation valve, a second-stage air storage chamber air expander sealing air outlet isolation valve, a third-stage air storage chamber air expander sealing air outlet isolation valve and a fourth-stage air storage chamber air expander sealing air outlet isolation valve, sending an instruction for opening all stages of air expander isolation air inlet isolation main valves, sending an instruction for fully opening a first-stage air expander isolation air inlet isolation valve, a second-stage air expander isolation air inlet isolation valve, a third-stage air expander isolation air inlet isolation valve and a fourth-stage air expander isolation air inlet isolation valve, sending an instruction for fully opening a first conventional nitrogen sealing device inlet isolation valve and a second conventional nitrogen sealing device inlet isolation valve, and sending an instruction for fully opening a first lubricating oil cooling water cooling oil inlet isolation valve and a second lubricating oil cooling water inlet isolation valve The method comprises the steps of starting an instruction of fully opening a first lubricating oil cooling water outlet isolation valve and a second lubricating oil cooling water outlet isolation valve, starting an instruction of fully opening a first high-temperature heat storage medium pump cooling water inlet isolation valve and a first high-temperature heat storage medium pump cooling water outlet isolation valve, starting an instruction of fully opening a second high-temperature heat storage medium pump cooling water inlet isolation valve and a second high-temperature heat storage medium pump cooling water outlet isolation valve, and waiting for the values of all state data in a first state data set to accord with respective corresponding preset normal values;
Wherein the first state data set comprises: the system comprises a first-stage gas storage chamber pressure, a second-stage gas storage chamber pressure, a third-stage gas storage chamber pressure, a fourth-stage gas storage chamber pressure, a first-stage gas storage chamber gas storage temperature, a second-stage gas storage chamber gas storage temperature, a third-stage gas storage chamber gas storage temperature, a fourth-stage gas storage chamber gas storage temperature, a lubricating oil tank liquid level, a conventional nitrogen production system gas supply pressure, a first-stage air expander isolated wind gas supply pressure, a second-stage air expander isolated wind gas supply pressure, a third-stage air expander isolated wind gas supply pressure, a fourth-stage air expander isolated wind gas supply pressure, a high-temperature heat storage medium tank liquid level, a low-temperature heat storage medium tank liquid level, a high-temperature heat storage medium tank pressure, a low-temperature heat storage medium tank pressure, a conventional plant cooling water system water supply pressure and a conventional plant cooling water supply temperature.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, before step 1000, the following is further included:
if the current state of the expansion power generation system completely meets all the conditions in the first condition group through the step 101, executing a step 103;
103, judging whether the current state of the alternating-current lubricating oil pump completely meets all conditions in the second condition group, if not, executing step 104, and if so, executing step 105;
Wherein each condition in the second condition group includes:
1) The first fume exhaust fan or the second fume exhaust fan is started;
2) The temperature of the oil tank electric heater which is put into the lubricating oil tank is automatically controlled;
3) The lubricating oil purification device is started;
104, sending an instruction for starting the first oil fume exhaust fan or the second oil fume exhaust fan, sending an instruction for automatically controlling the temperature of the oil tank electric heater which is put into the lubricating oil tank, and sending an instruction for starting the lubricating oil purifying device;
105, judging whether the un-started fume exhaust fan is put into the startup standby fan interlocking, if not, executing 106;
and step 106, sending an instruction of putting the non-started lampblack exhaust fan into interlocking with the started standby fan.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, before step 1000, the following is further included:
if the situation that the oil fume exhaust fan which is not started is put into the starting standby fan interlocking mode is judged in the step 105, the step 107 is executed;
step 107, judging whether at least one of the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump is started, and if not, executing step 108; if yes, go to step 109;
108, sending a command for starting the first alternating-current lubricating oil pump or the second alternating-current lubricating oil pump;
Step 109, judging whether the un-started alternating-current lubricating oil pump and the direct-current accident oil pump are both put into the starting standby pump interlocking, if not, executing step 110, and if so, executing step 111;
step 110, sending an instruction that the AC lubricating oil pump is not started and the DC accident oil pump is put into operation to start the backup pump interlock;
step 111, judging whether the current state of the lubricating oil pressure regulating valve completely meets all conditions in the third condition group, if not, executing step 112;
wherein each condition in the third condition group includes:
1) The pressure of the fed lubricating oil is automatically controlled by the lubricating oil pressure regulating valve;
2) The temperature of the fed lubricating oil is automatically controlled by the lubricating oil temperature regulating valve;
and step 112, sending an instruction for automatically controlling the input lubricating oil supply pressure of the lubricating oil pressure regulating valve and sending an instruction for automatically controlling the input lubricating oil supply temperature of the lubricating oil temperature regulating valve.
In an embodiment of the method for generating power by expansion of a compressed air energy storage power plant, the step 1000 specifically includes the following steps:
if the current state of the lubricating oil pressure regulating valve is judged to completely meet all the conditions in the third condition group through the step 111, executing a step 113;
Step 113, judging whether the current state of the high-temperature heat storage medium pump completely meets all conditions in the fourth set, if not, executing step 114, and if so, executing step 115;
wherein each condition in the fourth condition group includes:
1) The first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve are opened to a first preset opening degree;
2) The first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve are both in an open state;
3) The high-temperature heat storage medium pump recirculation isolation valve and the high-temperature heat storage medium pump recirculation regulating valve are both in an open state;
4) The first-stage interstage reheater heat storage medium side inlet isolation valve, the second-stage interstage reheater heat storage medium side inlet isolation valve, the third-stage interstage reheater heat storage medium side inlet isolation valve and the fourth-stage interstage reheater heat storage medium side inlet isolation valve are all in an open state;
5) The first-stage interstage reheater heat storage medium side inlet adjusting valve, the second-stage interstage reheater heat storage medium side inlet adjusting valve, the third-stage interstage reheater heat storage medium side inlet adjusting valve and the fourth-stage interstage reheater heat storage medium side inlet adjusting valve are all in an open state;
6) The first-stage interstage reheater heat storage medium side outlet isolation valve, the second-stage interstage reheater heat storage medium side outlet isolation valve, the third-stage interstage reheater heat storage medium side outlet isolation valve and the fourth-stage interstage reheater heat storage medium side outlet isolation valve are all in an open state;
step 114, issuing an instruction to open the first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve to a first preset opening degree, issuing an instruction to fully open the first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve, issuing an instruction to fully open the high-temperature heat storage medium pump recirculation isolation valve and the high-temperature heat storage medium pump recirculation regulating valve, issuing an instruction to fully open the first stage inter-stage reheater heat storage medium side inlet isolation valve, the second stage inter-stage reheater heat storage medium side inlet isolation valve, the third stage inter-stage reheater heat storage medium side inlet isolation valve and the fourth stage inter-reheater heat storage medium side inlet isolation valve, issuing an instruction to fully open the first stage reheater heat storage medium side inlet regulating valve, the second stage inter-reheater heat storage medium side inlet regulating valve, the third stage inter-reheater heat storage medium side inlet regulating valve and the fourth stage inter-stage reheater heat storage medium side inlet regulating valve, issuing an instruction to fully open the first stage inter-stage reheater heat storage medium side inlet isolation valve, the second stage inter-stage reheater heat storage medium side inlet regulating valve, the third stage reheater heat storage medium side inlet regulating valve and the fourth stage reheater heat storage medium side inlet regulating valve, and a fourth stage reheater heat storage medium side reheater heat storage medium outlet isolation valve, issuing a fourth stage reheater heat storage medium isolation valve;
Step 115, judging whether the duration of the current state of the high-temperature heat storage medium pump completely meeting all conditions in the fourth condition group is delayed for a first preset time or whether an instruction for manually confirming the emptying and preheating completion of the heat storage medium subsystem is received; if yes, go to step 116;
step 116, judging whether the current state of the high-temperature heat storage medium pump completely meets all conditions in a fifth condition group, and if not, executing step 117;
wherein each condition in the fifth condition group includes:
1) The first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve are both in an open state;
2) The first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve are both in a closed state;
3) The system comprises a first-stage interstage reheater heat storage medium side inlet isolation valve, a second-stage interstage reheater heat storage medium side inlet isolation valve, a third-stage interstage reheater heat storage medium side inlet isolation valve, a fourth-stage interstage reheater heat storage medium side inlet isolation valve, a first-stage interstage reheater heat storage medium side inlet adjusting valve, a second-stage interstage reheater heat storage medium side inlet adjusting valve, a third-stage interstage reheater heat storage medium side inlet adjusting valve, a fourth-stage interstage reheater heat storage medium side inlet adjusting valve, a first-stage interstage reheater heat storage medium side outlet isolation valve, a second-stage interstage reheater heat storage medium side outlet isolation valve, a third-stage reheater heat storage medium side outlet isolation valve and a fourth-stage reheater heat storage medium side outlet isolation valve, wherein the first-stage interstage reheater heat storage medium side inlet isolation valve, the second-stage reheater heat storage medium side inlet isolation valve and the fourth-stage reheater heat storage medium side outlet isolation valve are all in a closed state;
Step 117, issuing an instruction to fully open the first high temperature heat storage medium pump inlet isolation valve and the second high temperature heat storage medium pump inlet isolation valve, issuing an instruction to fully close the first high temperature heat storage medium pump outlet isolation valve and the second high temperature heat storage medium pump outlet isolation valve, issuing an instruction to fully close the first stage inter-stage reheater heat storage medium side inlet isolation valve, the second stage inter-stage reheater heat storage medium side inlet isolation valve, the third stage inter-stage reheater heat storage medium side inlet isolation valve and the fourth stage inter-stage reheater heat storage medium side inlet isolation valve, issuing an instruction to fully close the first stage inter-stage reheater heat storage medium side inlet adjustment valve, the second stage inter-stage reheater heat storage medium side inlet adjustment valve, the third stage reheater heat storage medium side inlet adjustment valve and the fourth stage inter-stage reheater heat storage medium side inlet adjustment valve, issuing an instruction to fully close the first stage inter-stage reheater heat storage medium side outlet isolation valve, the second stage reheater heat storage medium side outlet isolation valve and the fourth stage reheater heat storage medium side inlet adjustment valve.
In an embodiment of the method for generating power by expansion of a compressed air energy storage power station, the step 1000 specifically includes the following steps:
If the current state of the lubricating oil pressure regulating valve is judged to completely meet all the conditions in the fifth condition group through the step 116, executing a step 118;
step 118, determining whether the first high temperature heat storage medium pump or the second high temperature heat storage medium pump is started, if not, executing step 119; if yes, go to step 120;
step 119, issuing an instruction to start the first high temperature heat storage medium pump or the second high temperature heat storage medium pump 31;
step 120, judging whether the outlet isolation valves of the started high-temperature heat storage medium pump are all in an open state, if not, executing step 121; if yes, go to step 122;
and step 121, sending an instruction of fully opening the high-temperature heat storage medium pump outlet isolation valve. If the high-temperature heat storage medium pump outlet isolation valves are started, the high-temperature heat storage medium pump outlet isolation valves are all in an open state;
step 122, judging whether the high-temperature heat storage medium pump which is not started is put into starting of the standby pump interlocking, if not, executing step 123; if yes, go to step 124;
step 123, sending an instruction of putting the high-temperature heat storage medium pump which is not started into starting the backup pump interlock;
step 124, judging whether the outlet isolation valves of the high-temperature heat storage medium pump which are not started are all in an open state; if not, go to step 125; if yes, go to step 126;
Step 125, sending out an instruction of fully opening the outlet isolation valve of the high-temperature heat storage medium pump which is not started;
step 126, judging whether the current state of the high-temperature heat storage medium pump completely meets all conditions in the sixth condition group, if not, executing step 127; if so, acquiring the current target operation condition of the compressed air energy storage power station;
wherein each condition in the sixth condition group includes:
1) The high-temperature heat storage medium pump recirculation regulating valve is used for automatically controlling the flow of the heat storage medium at the outlet of the first-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the second-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the third-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the fourth-stage inter-stage reheater and the recirculation flow of the high-temperature heat storage medium pump;
2) The high-temperature heat storage medium pump frequency converter is started, and the outlet pressure of the high-temperature heat storage medium pump on the outlet pipeline of the frequency converter is automatically controlled;
and 127, sending an instruction for automatically controlling the flow of the heat storage medium thrown into the outlet of the first-stage inter-stage reheater by the high-temperature heat storage medium pump recirculation regulating valve, the flow of the heat storage medium at the outlet of the second-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the third-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the fourth-stage inter-stage reheater and the recirculation flow of the high-temperature heat storage medium pump, and sending an instruction for automatically controlling the outlet pressure of the high-temperature heat storage medium pump thrown into the outlet pipeline of the high-temperature heat storage medium pump after starting the frequency converter of the high-temperature heat storage medium pump.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, the first implementation manner of the step 2000 specifically includes the following contents:
if the target operation condition is a first-stage operation condition, selecting a first inter-stage reheating type air expansion generator set as a current target control object;
if it is determined in step 126 that the current state of the high-temperature heat storage medium pump completely meets all the conditions in the sixth condition group, step a128 is executed;
step A128, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the seventh condition group, if not, executing step A129, and if so, executing step A130;
wherein each condition in the seventh condition group comprises:
1) The first-stage air storage chamber is used for enabling the air expander to seal the air outlet isolation valves to be in an open state;
2) The sealing air inlet isolation valves of the first-stage air expander are all in an open state;
3) The second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are all in a closed state;
4) The first clutch has been placed in an unlocked state;
Step A129, sending an instruction of fully opening a first-stage air storage chamber for sealing an air outlet isolation valve of the air expansion machine, sending an instruction of fully opening a first-stage air expansion machine sealing air inlet isolation valve, sending an instruction of fully closing a second-stage air expansion machine sealing air inlet isolation valve, a third-stage air expansion machine sealing air inlet isolation valve and a fourth-stage air expansion machine sealing air inlet isolation valve, and sending an instruction of unlocking a first clutch;
step A130, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the eighth condition group, if not, executing step A131, and if so, executing step A133;
wherein each condition in the eighth condition group includes:
1) The air supply pressure of the sealing air of the first-stage air expander meets the corresponding preset normal state requirement;
2) The air supply pressure of the isolated air of the first-stage air expander meets the corresponding preset normal state requirement;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a first end bearing of the first stage air expander and the temperature of a second end bearing of the first stage air expander meet corresponding preset normal state requirements;
5) The temperature of a bearing at the first end of the generator and the temperature of a bearing at the second end of the generator, and the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
6) The first-stage air expander first end bearing lubricating oil return temperature, the first-stage air expander second end bearing lubricating oil return temperature and the first clutch lubricating oil return temperature meet corresponding preset normal state requirements;
7) The temperature of a three-phase coil of the generator meets the corresponding preset normal state requirement;
8) The first end shaft vibration of the generator, the second end shaft vibration of the generator, the first end shaft vibration of the speed reducer of the gear box, the second end shaft vibration of the speed reducer of the gear box, the first end shaft vibration of the first-stage air expander and the second end shaft vibration of the first-stage air expander meet the corresponding preset normal state requirements;
9) The first stage air expander shaft displacement and the first clutch shaft displacement meet corresponding preset normal state requirements;
10 The misalignment of the first clutch shaft meets the corresponding preset normal state requirement;
step A131, judging whether an inlet cut-off valve and an inlet adjusting valve of a first-stage air expansion machine are both in a closed state; if not, go to step A132; if yes, executing step A133;
Step A132, sending an instruction for fully closing the first-stage air expander inlet shut-off valve and the first-stage air expander inlet regulating valve;
step a133, determining whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the ninth condition group, if not, executing step a134, and if so, executing step a135;
wherein each condition in the ninth condition group includes:
1) The outlet regulating valve of the first-stage air storage chamber is automatically controlled by the air pressure of the outlet of the first-stage interstage reheater;
2) The bypass adjusting valve of the first-stage air expander is opened to a second preset opening degree;
3) The first-stage interstage reheater heat storage medium side inlet isolation valve and the first-stage interstage reheater heat storage medium side outlet isolation valve are both in an open state;
4) A first-stage inter-stage reheater heat storage medium side inlet adjusting valve is used for automatically controlling the temperature of the air at the outlet of the first-stage inter-stage reheater;
step A134, sending an instruction of automatically controlling the air pressure of an outlet of a first-stage air storage chamber in which an outlet adjusting valve is switched into a first-stage inter-stage reheater, sending an instruction of opening a bypass adjusting valve of a first-stage air expander to a second preset opening degree, sending an instruction of fully opening a heat storage medium side inlet isolation valve of the first-stage inter-stage reheater and a heat storage medium side outlet isolation valve of the first-stage inter-stage reheater, and sending an instruction of automatically controlling the air temperature of an outlet of the first-stage inter-stage reheater in which the heat storage medium side inlet adjusting valve of the first-stage inter-stage reheater is switched into the first-stage inter-stage reheater;
Step A135, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the tenth condition group, if not, executing step A136, and if so, executing step A137;
wherein each condition in the tenth condition group includes:
1) The outlet isolation valves of the first-stage air storage chamber are all in an open state;
2) The inlet cut-off valves of the first-stage air expander are all in an open state;
3) The outlet air pressure and the outlet air temperature of the first-stage inter-stage reheater meet the starting air intake requirement of the first-stage air expansion machine;
step A136, sending an instruction of fully opening an outlet isolation valve of the first-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the first-stage air expansion machine, and sending a command of waiting for the outlet air pressure of the first-stage interstage reheater and the outlet air temperature of the first-stage interstage reheater to meet the starting air intake requirement of the first-stage air expansion machine;
step A137, judging whether the bypass regulating valve of the first-stage air expander is in a closed state, if not, executing the step A138;
step a138, a command is issued to fully close the first stage air expander bypass trim valve.
If the bypass regulating valve of the first-stage air expander is judged and known to be in a closed state through the step A137, the step A139 is executed;
Step A139, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the tenth condition group, if not, executing step A140;
wherein each condition in the tenth condition group includes:
1) The inlet regulating valve of the first-stage air expander is automatically controlled by the rotating speed of the rotor of the first-stage air expander;
2) The rotating speed of the rotor of the first-stage air expander is increased to a first preset rotating speed according to a first preset acceleration rate;
3) The first clutch has been in a disengaged state;
step A140, sending an instruction of automatically controlling the rotor speed of the first stage air expander by switching the inlet regulating valve of the first stage air expander, and waiting until the rotor speed of the first stage air expander is increased to a first preset speed according to a first preset acceleration rate and the first clutch is in a disengaged state.
If the current state of the first inter-stage reheating type air expansion generator set is judged and obtained to completely meet all conditions in the tenth condition group through the step A139, executing the step A141;
step A141, judging whether the rotating speed of the rotor of the first-stage air expander is increased to a second preset rotating speed according to a second preset acceleration rate, if so, executing step A142;
Step A142, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the twelfth condition group, if not, executing step A143; if yes, go to step A144;
wherein each condition in the twelfth condition group includes:
1) The duration of the rotating speed of the rotor of the first-stage air expander rising to a second preset rotating speed is delayed for a second preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A143, judging whether the rotating speed of the rotor of the first-stage air expander is increased to a third preset rotating speed according to a third preset acceleration rate, if so, executing step A144;
step A144, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the thirteenth condition group, if not, executing step A145; if yes, executing step A146;
wherein each condition in the thirteenth set of conditions includes:
1) The duration that the first inter-stage reheating air expansion generator set completely meets all the conditions in the twelfth condition group is delayed by a third preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A145, judging whether the rotating speed of the rotor of the first-stage air expander is increased to a fourth preset rotating speed according to a fourth preset acceleration rate, if so, executing step A146;
step A146, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the tenth four-bar set, if not, executing step A147; if yes, go to step A148;
wherein each condition in the fourteenth condition group includes:
1) The duration that the first inter-stage reheat air expansion generator set completely meets all the conditions in the thirteenth condition group is delayed by a fourth preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A147, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the fifteenth condition group, if not, executing step A148; if yes, go to step A149;
wherein each condition in the fifteenth condition group includes:
1) The generator is connected to the grid;
2) The inlet regulating valve of the first stage air expander is put into the unit for automatic control;
step A148, sending a generator grid-connection instruction, and sending an instruction for putting the first-stage air expander inlet valve adjusting into unit load automatic control;
step a149, determining whether the unit load has increased to a first preset load ratio, and if so, executing step a150.
Step A150, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the sixteenth condition group, and if not, executing step A151; if yes, go to step A152;
wherein each condition in the sixteenth set of conditions comprises:
1) The duration that the first inter-stage reheat air expansion genset fully meets all conditions in the fifteenth condition group is delayed by a fifth preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A151, judging whether the unit load is increased to a second preset load proportion, if yes, executing step A152;
step A152, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in a seventeenth condition group, if so, finishing all starting steps of the expansion power generation system;
Wherein each condition in the seventeenth set of conditions includes:
1) The duration that the first inter-stage reheat air expansion generator set completely meets all the conditions in the sixteenth condition group is delayed by a sixth preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, the second implementation manner of the step 2000 specifically includes the following contents:
if the target operation condition is a second-stage operation condition, selecting a first inter-stage reheating air expansion generator set, a second inter-stage reheating air expansion generator set and a third inter-stage reheating air expansion generator set as current target control objects;
if the current state of the high-temperature heat storage medium pump is judged to completely meet all the conditions in the sixth condition group through the step 126, executing a step B128;
step B128, determining whether the current state of the current target control object completely satisfies all the conditions in the eighteenth condition group, if not, executing step B129; if yes, go to step B130;
wherein each condition in the eighteenth condition group includes:
1) The second-stage air storage chamber is used for opening the air outlet isolating valves of the air expansion machine;
2) The first stage air expander sealing air inlet isolation valve and the second stage air expander sealing air inlet isolation valve are both in an open state;
3) The third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are both in a closed state;
4) The first clutch has been placed in a locked state;
5) The second clutch has been placed in an unlocked state;
step B129, sending an instruction for fully opening a second-stage air storage chamber to supply air expansion machine sealing air outlet isolation valves, sending an instruction for fully opening a first-stage air expansion machine sealing air inlet isolation valve and a second-stage air expansion machine sealing air inlet isolation valve, sending an instruction for fully closing a third-stage air expansion machine sealing air inlet isolation valve and a fourth-stage air expansion machine sealing air inlet isolation valve, sending an instruction for locking the first clutch 7, and sending an instruction for unlocking the second clutch;
step B130, judging whether the current state of the current target control object completely meets all the conditions in the nineteenth condition group, if so, executing step B131;
wherein each condition in the nineteenth condition group includes:
1) The air supply pressure of the sealing air of the first-stage air expander and the air supply pressure of the sealing air of the second-stage air expander meet the corresponding preset normal state requirements;
2) The air supply pressure of the isolation air of the first-stage air expander and the air supply pressure of the isolation air of the second-stage air expander meet the corresponding preset normal state requirements;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement, and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a bearing at the first end of the generator, the temperature of a bearing at the second end of the generator, the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
5) The temperature of a first end bearing of the first-stage air expander, the temperature of a second end bearing of the first-stage air expander, the temperature of a first end bearing of the second-stage air expander and the temperature of a second end bearing of the second-stage air expander meet the corresponding requirements of a preset normal state;
6) The temperature of a three-phase coil of the generator meets the corresponding preset normal state requirement;
7) The first end bearing lubricating oil return temperature of the first-stage air expander, the second end bearing lubricating oil return temperature of the first-stage air expander, the first end bearing lubricating oil return temperature of the second-stage air expander, the second end bearing lubricating oil return temperature of the second-stage air expander, the first clutch lubricating oil return temperature and the second clutch lubricating oil return temperature meet the corresponding preset normal state requirements;
8) The first end shaft vibration of the generator, the second end shaft vibration of the generator, the first end shaft vibration of the speed reducer of the gear box, the second end shaft vibration of the speed reducer of the gear box, the first end shaft vibration of the first-stage air expander, the second end shaft vibration of the first-stage air expander, the first end shaft vibration of the second-stage air expander and the second end shaft vibration of the second-stage air expander meet the corresponding preset normal state requirements;
9) The first stage air expander shaft displacement, the second stage air expander shaft displacement, the first clutch shaft displacement and the second clutch shaft displacement meet corresponding preset normal state requirements;
10 The first clutch shaft misalignment magnitude and the second clutch shaft misalignment magnitude meet the corresponding preset normal state requirements;
step B131, judging whether the current state of the current target control object completely meets all the conditions in the twenty-th condition group, if not, executing step B132; if yes, go to step B133;
wherein each condition in the twenty-fourth condition group includes:
1) The first-stage air expander inlet shut-off valve and the first-stage air expander inlet adjusting valve are both in an open state;
2) The second-stage air expander inlet shut-off valve and the second-stage air expander inlet adjusting valve are both in a closed state;
3) The bypass regulating valves of the first-stage air expander are all in a closed state;
step B132, sending an instruction for fully opening the inlet cutoff valve of the first-stage air expansion machine and the inlet regulating valve of the first-stage air expansion machine, sending an instruction for fully closing the inlet cutoff valve of the second-stage air expansion machine and the inlet regulating valve of the second-stage air expansion machine, and sending an instruction for fully closing the bypass regulating valve of the first-stage air expansion machine;
step B133, determining whether the current state of the current target control object completely satisfies all conditions in the twentieth condition group, if not, executing step B134;
wherein each condition in the twenty-first condition group includes:
1) The outlet regulating valve of the second-stage air storage chamber is put into the outlet air pressure automatic control of the second-stage interstage reheater;
2) The bypass regulating valve of the second-stage air expander is opened to a second preset opening degree;
3) The first-stage interstage reheater heat storage medium side inlet isolation valve, the first-stage interstage reheater heat storage medium side outlet isolation valve, the second-stage interstage reheater heat storage medium side inlet isolation valve and the second-stage interstage reheater heat storage medium side outlet isolation valve are all in an open state;
4) A first-stage inter-stage reheater heat storage medium side inlet adjusting valve and a second-stage inter-stage reheater heat storage medium side inlet adjusting valve are respectively used for automatically controlling the outlet air temperature of the first-stage inter-stage reheater and the outlet air temperature of the second-stage inter-stage reheater;
And step B134, sending an instruction that a second-stage air storage chamber outlet regulating valve is thrown into outlet air pressure automatic control of a second-stage inter-stage reheater, sending an instruction that a second-stage air expander bypass regulating valve is opened to a second preset opening degree, sending an instruction that a first-stage inter-stage reheater heat storage medium side inlet isolating valve and a first-stage inter-stage reheater heat storage medium side outlet isolating valve are fully opened, sending an instruction that a second-stage inter-stage reheater heat storage medium side inlet isolating valve and a second-stage inter-stage reheater heat storage medium side outlet isolating valve are fully opened, and sending an instruction that a first-stage inter-stage reheater heat storage medium side inlet regulating valve and a second-stage inter-stage reheater heat storage medium side inlet regulating valve are respectively thrown into outlet air temperature of the first-stage inter-stage reheater and outlet air temperature automatic control of the second-stage inter-stage reheater.
If the current state of the current target control object is judged and known to completely meet all the conditions in the twentieth condition group through the step B133, executing the step B135;
step B135, determining whether the current state of the current target control object completely satisfies all the conditions in the twentieth condition group, if not, executing step B136; if yes, go to step B137;
Wherein each condition in the twenty-second condition group includes:
1) The second-stage air storage chamber outlet isolation valves are all in an open state;
2) The inlet cut-off valves of the second-stage air expander are all in an open state;
3) The second stage inter-stage reheater outlet air pressure and the second stage inter-stage reheater outlet air temperature meet the starting air inlet requirement of the second stage air expansion machine;
step B136, sending an instruction of fully opening an outlet isolation valve of the second-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the second-stage air expansion machine, and waiting for the outlet air pressure of the second-stage inter-stage reheater and the outlet air temperature of the second-stage inter-stage reheater to meet the starting air intake requirement of the second-stage air expansion machine;
step B137, judging whether the bypass regulating valves of the second-stage air expander are all in a closed state, and if not, executing step B138; if yes, go to step B139;
step B138, sending a command of fully closing a bypass adjusting valve of the second-stage air expander;
step B139, judging whether the current state of the current target control object completely meets all the conditions in the twenty-third component group, if not, executing step B140; if yes, go to step B141;
wherein each condition in the twenty-third group includes:
1) The inlet regulating valve of the second-stage air expander is automatically controlled by the rotating speed of the rotor of the second-stage air expander;
2) The rotor speed of the first-stage air expander and the rotor speed of the second-stage air expander are increased to a first preset speed according to a first preset acceleration rate;
3) The first clutch is already in an engaged state, and the second clutch is already in a disengaged state;
step B140, sending an instruction of fully opening the inlet regulating valve of the first-stage air expander, sending an instruction of automatically controlling the rotating speed of the rotor of the second-stage air expander when the inlet regulating valve of the second-stage air expander is put into operation, and waiting for the rotating speed of the rotor of the first-stage air expander and the rotating speed of the rotor of the second-stage air expander to be increased to a first preset rotating speed according to a first preset acceleration rate, the first clutch is in a meshing state, and the second clutch is in a disengaging state;
step B141, judging whether the rotor rotating speed of the first-stage air expander and the rotor rotating speed S3 of the second-stage air expander are increased to a second preset rotating speed according to a second preset acceleration rate, if so, executing step B142;
step B142, determining whether the current state of the current target control object completely satisfies all conditions in the twenty-fourth condition group, if yes, executing step B143;
Wherein each condition in the twenty-fourth group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the twenty-third group is delayed by a second preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step B143, judging whether the rotating speed of the rotor of the first-stage air expander and the rotating speed of the rotor of the second-stage air expander are increased to a third preset rotating speed according to a third preset acceleration rate, if so, executing step B144;
step B144, determining whether the current state of the current target control object completely satisfies all conditions in the second fifteen condition group, if yes, executing step B145;
wherein each condition in the second fifteen condition group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the twenty-fourth group is delayed by a third preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step B145, judging whether the rotating speed of the rotor of the first-stage air expander and the rotating speed of the rotor of the second-stage air expander are increased to a fourth preset rotating speed according to a fourth preset acceleration rate; if yes, go to step B146;
Step B146, determining whether the current state of the current target control object completely meets all the conditions in the twenty-sixth condition group, if yes, executing step B147;
wherein each condition in the twenty-sixth condition group comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the second fifteen condition group is delayed by a fourth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step B147, determining whether the current state of the current target control object completely satisfies all conditions in the twenty-seventh condition group, if not, executing step B148; if yes, go to step B149;
wherein each condition in the twenty-seventh condition group comprises:
1) The generator is connected to the grid;
2) The inlet regulating valve of the second stage air expander is put into the unit for automatic control;
step B148, sending a generator grid connection instruction, and sending an instruction for automatically controlling the load of the second-stage air expander when the second-stage air expander is put into the unit by the inlet valve regulation;
step B149, judging whether the unit load is increased to a first preset load proportion, if so, executing step B150;
Step B150, judging whether the current state of the current target control object completely meets all the conditions in the twenty-eighth condition group, if so, executing step B151;
wherein each condition in the twenty-eighth condition group comprises:
1) Delaying the duration of the unit load increasing to the first preset load proportion by a fifth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step B151, judging whether the load of the unit is increased to a second preset load proportion, if so, executing step B152;
step B152, judging whether the current state of the current target control object completely meets all the conditions in the second nineteen condition group, if so, finishing all the starting steps of the expansion power generation system;
wherein each condition in the second nineteen condition group comprises:
1) The duration that the current state of the current target control object completely meets all the conditions in the twenty-eighth condition group is delayed by a sixth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements.
In an embodiment of the expansion power generation method for a compressed air energy storage power station, the third implementation manner of the step 2000 specifically includes the following steps:
If the target operation condition is a third-stage operation condition, selecting a first inter-stage reheating air expansion generator set, a second inter-stage reheating air expansion generator set and a third inter-stage reheating air expansion generator set as current target control objects;
if the current state of the high-temperature heat storage medium pump is judged to completely meet all the conditions in the sixth condition group through the step 126, executing a step C128;
step C128, determining whether the current state of the current target control object completely satisfies all the conditions in the thirty-third condition groups, if not, executing step C129; if yes, go to step C130;
wherein each condition in the thirty-third set of conditions comprises:
1) The third-stage air storage chamber is used for opening the air outlet isolating valves of the air expansion machine;
2) The first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve and the third stage air expander sealing air inlet isolation valve are all in an opening state;
3) The fourth-stage air expander sealing air inlet isolation valves are all in a closed state;
4) The first clutch and the second clutch have been placed in a locked state;
5) The third clutch has been placed in an unlocked state;
Step C129, sending an instruction of fully opening a third-stage air storage chamber for sealing an air outlet isolation valve of the air expansion machine, sending an instruction of fully opening a first-stage air expansion machine sealing air inlet isolation valve, a second-stage air expansion machine sealing air inlet isolation valve and a third-stage air expansion machine sealing air inlet isolation valve, sending an instruction of fully closing a fourth-stage air expansion machine sealing air inlet isolation valve, sending an instruction of locking a first clutch and a second clutch, and sending an instruction of unlocking a third clutch;
step C130, determining whether the current state of the current target control object completely satisfies all conditions in the thirtieth condition group, if yes, executing step C131;
wherein each condition in the thirty-first set of conditions comprises:
1) The air supply pressure of the sealing air of the first-stage air expander, the air supply pressure of the sealing air of the second-stage air expander and the air supply pressure of the sealing air of the third-stage air expander meet the corresponding preset normal state requirements;
2) The air supply pressure of the isolated air of the first-stage air expander, the air supply pressure of the isolated air of the second-stage air expander and the air supply pressure of the isolated air of the third-stage air expander meet the corresponding preset normal state requirements;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a bearing at the first end of the generator, the temperature of a bearing at the second end of the generator, the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
5) The temperature of a first end bearing of the first stage air expander, the temperature of a second end bearing of the first stage air expander, the temperature of a first end bearing of the second stage air expander, the temperature of a second end bearing of the second stage air expander, the temperature of a first end bearing of the third stage air expander and the temperature of a second end bearing of the third stage air expander meet corresponding preset normal state requirements;
6) The temperature of the three-phase coil of the generator meets the corresponding preset normal state requirement;
7) The first-stage air expander first end bearing lubricating oil return temperature, the first-stage air expander second end bearing lubricating oil return temperature, the second-stage air expander first end bearing lubricating oil return temperature, the second-stage air expander second end bearing lubricating oil return temperature, the third-stage air expander first end bearing lubricating oil return temperature, the third-stage air expander second end bearing lubricating oil return temperature, the first clutch lubricating oil return temperature, the second clutch lubricating oil return temperature and the third clutch lubricating oil return temperature meet corresponding preset normal state requirements;
8) The shaft vibration of a first end of the generator, the shaft vibration of a second end of the generator, the shaft vibration of a first end of the speed reducer of the gear box, the shaft vibration of a second end of the speed reducer of the gear box, the shaft vibration of a first end of a first-stage air expander, the shaft vibration of a second end of the first-stage air expander, the shaft vibration of a first end of a second-stage air expander, the shaft vibration of a second end of the second-stage air expander, the shaft vibration of a first end of a third-stage air expander and the shaft vibration of a second end of the third-stage air expander meet the corresponding requirements of a preset normal state;
9) The first stage air expander shaft displacement, the second stage air expander shaft displacement, the third stage air expander shaft displacement, the first clutch shaft displacement, the second clutch shaft displacement and the third clutch shaft displacement meet corresponding preset normal state requirements;
10 The first clutch shaft misalignment amount, the second clutch shaft misalignment amount and the third clutch shaft misalignment amount meet the corresponding preset normal state requirements;
step C131, determining whether the current state of the current target control object completely satisfies all conditions in the thirtieth condition group, if not, executing step C132; if yes, go to step C133;
wherein each condition in the thirty-second condition group includes:
1) The first stage air expander inlet cut-off valve, the second stage air expander inlet cut-off valve, the first stage air expander inlet regulating valve and the second stage air expander inlet regulating valve are all in an open state;
2) The third-stage air expander inlet shut-off valve and the third-stage air expander inlet adjusting valve are both in a closed state;
3) The bypass adjusting valve of the first-stage air expander and the bypass adjusting valve of the second-stage air expander are both in a closed state;
step C132, sending out an instruction for fully opening the inlet cutoff valve of the first-stage air expansion machine and the inlet cutoff valve of the second-stage air expansion machine, sending out an instruction for fully opening the inlet regulating valve of the first-stage air expansion machine and the inlet regulating valve of the second-stage air expansion machine, sending out an instruction for fully closing the inlet cutoff valve of the third-stage air expansion machine and the inlet regulating valve of the third-stage air expansion machine, and sending out an instruction for fully closing the bypass regulating valve of the first-stage air expansion machine and the bypass regulating valve of the second-stage air expansion machine;
step C133, determining whether the current state of the current target control object completely satisfies all conditions in the thirty-third component group, if not, executing step C134; if yes, go to step C135;
wherein each condition in the thirty-third group includes:
1) The outlet regulating valve of the third-stage air storage chamber is automatically controlled by the outlet air pressure of the reheater between the third-stage stages;
2) The bypass adjusting valve of the third-stage air expander is opened to a second preset opening degree;
3) The heat storage medium side inlet isolation valve of the first-stage interstage reheater, the heat storage medium side outlet isolation valve of the first-stage interstage reheater, the heat storage medium side inlet isolation valve of the second-stage interstage reheater, the heat storage medium side outlet isolation valve of the second-stage interstage reheater, the heat storage medium side inlet isolation valve of the third-stage interstage reheater and the heat storage medium side outlet isolation valve of the third-stage interstage reheater are all in an open state;
4) The first-stage inter-stage reheater heat storage medium side inlet adjusting valve, the second-stage inter-stage reheater heat storage medium side inlet adjusting valve and the third-stage inter-stage reheater heat storage medium side inlet adjusting valve are respectively used for automatically controlling the outlet air temperature of the first-stage inter-stage reheater, the outlet air temperature of the second-stage inter-stage reheater and the outlet air temperature of the third-stage inter-stage reheater;
step C134, sending an instruction that a third-stage air storage chamber outlet regulating valve is thrown into a third-stage inter-stage reheater outlet air pressure automatic control, sending an instruction that a third-stage air expander bypass regulating valve is opened to a second preset opening degree, sending an instruction that a first-stage inter-stage reheater heat-storage medium side inlet isolating valve and a first-stage inter-stage reheater heat-storage medium side outlet isolating valve are fully opened, sending an instruction that a second-stage inter-stage reheater heat-storage medium side inlet isolating valve and a second-stage reheater heat-storage medium side outlet isolating valve are fully opened, sending an instruction that a third-stage inter-stage reheater heat-storage medium side inlet isolating valve and a third-stage inter-stage reheater heat-storage medium side outlet isolating valve are fully opened, and sending an instruction that a first-stage reheater heat-storage medium side inlet regulating valve, a second-stage inter-stage reheater heat-storage medium side inlet regulating valve and a third-stage inter-stage reheater heat-storage medium inlet regulating valve are respectively thrown into a first-stage reheater outlet air temperature, a second-stage reheater outlet air temperature automatic control;
Step C135, judging whether the current state of the current target control object completely meets all the conditions in the thirty-fourth group, if not, executing step C136; if yes, go to step C137;
wherein each condition in the thirty-fourth group of conditions includes:
1) The outlet isolation valves of the third-stage air storage chamber are all in an open state;
2) The inlet cut-off valves of the third-stage air expander are all in an open state;
3) The outlet air pressure and the outlet air temperature of the third-stage inter-stage reheater meet the starting air inlet requirement of the third-stage air expansion machine;
step C136, sending an instruction of fully opening an outlet isolation valve of the third-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the third-stage air expansion machine, and waiting for the outlet air pressure of the third-stage interstage reheater and the outlet air temperature of the third-stage interstage reheater to meet the starting air inlet requirement of the third-stage air expansion machine;
step C137, judging whether the bypass regulating valve of the third-stage air expander is in a closed state, if not, executing the step C138;
step C138, a command is issued to fully close the third stage air expander bypass trim valve.
If the third-stage air expander bypass regulating valve is judged and known to be in the closed state through the step C137, the step C139 is executed;
Step C139, judging whether the current state of the current target control object completely meets all the conditions in the thirty-fifth condition group, if not, executing step C140; if yes, go to step C141;
wherein each condition in the thirty-fifth set of conditions comprises:
1) The third-stage air expander inlet adjusting valve is used for automatically controlling the rotating speed of the third-stage air expander rotor;
2) The rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander and the rotor speed of the third-stage air expander are increased to a first preset speed according to a first preset acceleration rate;
3) The first clutch and the second clutch are already in an engaged state, and the third clutch is already in a disengaged state;
step C140, sending an instruction of automatically controlling the rotor speed of the third-stage air expander by switching an inlet regulating valve of the third-stage air expander, and waiting for the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander and the rotor speed of the third-stage air expander to be increased to a first preset speed and a first clutch according to a first preset acceleration rate, wherein the second clutch is in a meshed state, and the third clutch is in a disengaged state;
step C141, judging whether the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander and the rotor speed of the third-stage air expander are increased to a second preset speed according to a second preset acceleration rate, if so, executing step C142;
Step C142, determining whether the current state of the current target control object completely meets all the conditions in the thirty-sixth condition group, if yes, executing step C143;
wherein each condition in the thirty-sixth set of conditions comprises:
1) The duration that the current state of the current target control object completely meets all the conditions in the thirty-fifth condition group is delayed by a second preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C143, judging whether the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander and the rotating speed of the rotor of the third-stage air expander are increased to a third preset rotating speed according to a third preset acceleration rate, if so, executing the step C144;
step C144, determining whether the current state of the current target control object completely meets all the conditions in the thirty-seventh condition group, if yes, executing step C145;
wherein each condition in the thirty-seventh set of conditions comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the thirty-sixth condition group is delayed by a third preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C145, judging whether the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander and the rotating speed of the rotor of the third-stage air expander are increased to a fourth preset rotating speed according to a fourth preset acceleration rate, if yes, executing the step C146;
step C146, determining whether the current state of the current target control object completely satisfies all conditions in the thirty-eighth condition group, if yes, executing step C147;
wherein each condition in the thirty-eighth set of conditions comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the thirty-seventh condition group is delayed by a fourth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C147, determining whether the current state of the current target control object completely satisfies all conditions in the thirty-ninth condition group, if not, executing step C148; if yes, go to step C149;
wherein each condition in the thirty-ninth set of conditions comprises:
1) The generator is already connected to the grid;
2) The load of the third stage air expander is automatically controlled after the inlet adjusting valve is put into the unit;
step C148, sending a generator grid connection instruction, and sending an instruction for putting the third-stage air expander inlet valve regulation into unit load automatic control;
step C149, judging whether the unit load is increased to a first preset load proportion, if so, executing step C150;
step C150, judging whether the current state of the current target control object completely meets all the conditions in the forty-fourth condition group, if so, executing step C151;
wherein each condition in the forty-fourth condition set comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the thirty-ninth condition group is delayed by a fifth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C151, judging whether the load of the unit is increased to a second preset load proportion, if so, executing step C152;
step C152, judging whether the current state of the current target control object completely meets all the conditions in the fortieth condition group, if so, finishing all the starting steps of the expansion power generation system;
Wherein each condition in the fortieth set of conditions includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the forty-fourth condition group is delayed by a sixth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements.
In an embodiment of the expansion power generation method for a compressed air energy storage power station, the fourth implementation manner of the step 2000 specifically includes the following steps:
if the target operation condition is a fourth-stage operation condition, selecting a first inter-stage reheating type air expansion generator set, a second inter-stage reheating type air expansion generator set, a third inter-stage reheating type air expansion generator set and a fourth inter-stage reheating type air expansion generator set as current target control objects;
if the current state of the high-temperature heat storage medium pump is judged to completely meet all the conditions in the sixth condition group through the step 126, executing a step D128;
step D128, judging whether the current state of the current target control object completely meets all the conditions in the fortieth condition group, if not, executing the step D129; if yes, go to step D130;
Wherein each condition in the forty-second condition group includes:
1) The fourth-stage air storage chamber is used for enabling the air expander to seal the air outlet isolation valves to be in an open state;
2) The first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are all in an open state;
3) The first clutch, the second clutch and the third clutch have been placed in a locked state;
step D129, sending an instruction for fully opening a fourth-stage air storage chamber for sealing an air outlet isolation valve of the air expansion machine, sending an instruction for fully opening a first-stage air expansion machine sealing air inlet isolation valve, a second-stage air expansion machine sealing air inlet isolation valve, a third-stage air expansion machine sealing air inlet isolation valve and a fourth-stage air expansion machine sealing air inlet isolation valve, and sending an instruction for locking a first clutch, a second clutch and a third clutch;
step D130, judging whether the current state of the current target control object completely meets all the conditions in the forty-third group, if so, executing step D131;
wherein each condition in the forty-third set includes:
1) The air supply pressure of the sealing air of the first-stage air expander, the air supply pressure of the sealing air of the second-stage air expander, the air supply pressure of the sealing air of the third-stage air expander and the air supply pressure of the sealing air of the fourth-stage air expander meet the corresponding requirements of a preset normal state;
2) The air supply pressure of the isolated air of the first-stage air expander, the air supply pressure of the isolated air of the second-stage air expander, the air supply pressure of the isolated air of the third-stage air expander and the air supply pressure of the isolated air of the fourth-stage air expander meet the corresponding preset normal state requirements;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a bearing at the first end of the generator, the temperature of a bearing at the second end of the generator, the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
5) The temperature of a first end bearing of a first-stage air expander, the temperature of a second end bearing of the first-stage air expander, the temperature of a first end bearing of a second-stage air expander, the temperature of a second end bearing of the second-stage air expander, the temperature of a first end bearing of a third-stage air expander, the temperature of a second end bearing of the third-stage air expander, the temperature of a first end bearing of a fourth-stage air expander and the temperature of a second end bearing of the fourth-stage air expander meet corresponding preset normal state requirements;
6) The temperature of the three-phase coil of the generator meets the corresponding preset normal state requirement;
7) The first end bearing lubricating oil return temperature of the first-stage air expander, the second end bearing lubricating oil return temperature of the first-stage air expander, the first end bearing lubricating oil return temperature of the second-stage air expander, the second end bearing lubricating oil return temperature of the second-stage air expander, the first end bearing lubricating oil return temperature of the third-stage air expander, the second end bearing lubricating oil return temperature of the third-stage air expander, the first end bearing lubricating oil return temperature of the fourth-stage air expander, the second end bearing lubricating oil return temperature of the fourth-stage air expander, the first clutch lubricating oil return temperature, the second clutch lubricating oil return temperature and the third clutch lubricating oil return temperature meet corresponding preset normal state requirements;
8) The first end shaft vibration of the generator, the second end shaft vibration of the generator, the first end shaft vibration of the speed reducer of the gear box, the second end shaft vibration of the speed reducer of the gear box, the first end shaft vibration of the first air expander, the second end shaft vibration of the first air expander, the first end shaft vibration of the second air expander, the second end shaft vibration of the second air expander, the first end shaft vibration of the third air expander, the second end shaft vibration of the third air expander, the first end shaft vibration of the fourth air expander and the second end shaft vibration of the fourth air expander meet the corresponding preset normal state requirements;
9) The first stage air expander shaft displacement, the second stage air expander shaft displacement, the third stage air expander shaft displacement, the fourth stage air expander shaft displacement, the first clutch shaft displacement, the second clutch shaft displacement and the third clutch shaft displacement meet corresponding preset normal state requirements;
10 The first clutch shaft misalignment amount, the second clutch shaft misalignment amount and the third clutch shaft misalignment amount meet the corresponding preset normal state requirements;
step D131, judging whether the current state of the current target control object completely meets all the conditions in the fortieth four-bar group, if not, executing step D132; if yes, go to step D133;
wherein each condition in the forty-fourth group includes:
1) The first stage air expander inlet cut-off valve, the second stage air expander inlet cut-off valve, the third stage air expander inlet cut-off valve, the first stage air expander inlet regulating valve, the second stage air expander inlet regulating valve and the third stage air expander inlet regulating valve are all in an open state;
2) The fourth-stage air expander inlet shut-off valve and the fourth-stage air expander inlet regulating valve are both in a closed state;
3) The first stage air expander bypass regulating valve, the second stage air expander bypass regulating valve and the third stage air expander bypass regulating valve are all in a closed state;
step D132, sending out an instruction for fully opening an inlet cutoff valve of the first-stage air expansion machine, an inlet cutoff valve of the second-stage air expansion machine and an inlet cutoff valve of the third-stage air expansion machine, sending out an instruction for fully opening an inlet regulating valve of the first-stage air expansion machine, an inlet regulating valve of the second-stage air expansion machine and an inlet regulating valve of the third-stage air expansion machine, sending out an instruction for fully closing an inlet cutoff valve of the fourth-stage air expansion machine and an inlet regulating valve of the fourth-stage air expansion machine, and sending out an instruction for fully closing a bypass regulating valve of the first-stage air expansion machine, a bypass regulating valve of the second-stage air expansion machine and a bypass regulating valve of the third-stage air expansion machine;
step D133, judging whether the current state of the current target control object completely meets all the conditions in the forty-fifth condition group, if not, executing step D134; if yes, go to step D135;
wherein each condition in the forty-fifth set of conditions comprises:
1) An outlet adjusting valve of the fourth-stage air storage chamber is automatically controlled by the outlet air pressure of the reheater in the fourth-stage air storage chamber;
2) The fourth-stage air expander bypass regulating valve is opened to a second preset opening degree;
3) The heat storage medium side inlet isolation valve of the first-stage interstage reheater, the heat storage medium side outlet isolation valve of the first-stage interstage reheater, the heat storage medium side inlet isolation valve of the second-stage interstage reheater, the heat storage medium side outlet isolation valve of the second-stage interstage reheater, the heat storage medium side inlet isolation valve of the third-stage interstage reheater, the heat storage medium side outlet isolation valve of the third-stage interstage reheater, the heat storage medium side inlet isolation valve of the fourth-stage interstage reheater and the heat storage medium side outlet isolation valve of the fourth-stage interstage reheater are all in an open state;
4) A first-stage interstage reheater heat storage medium side inlet adjusting valve, a second-stage interstage reheater heat storage medium side inlet adjusting valve, a third-stage interstage reheater heat storage medium side inlet adjusting valve and a fourth-stage interstage reheater heat storage medium side inlet adjusting valve are respectively used for automatically controlling the outlet air temperature of the first-stage interstage reheater, the outlet air temperature of the second-stage interstage reheater, the outlet air temperature of the third-stage interstage reheater and the outlet air temperature of the fourth-stage interstage reheater;
step D134, sending an instruction of automatically controlling the pressure of the outlet air of a fourth-stage reheater thrown by an outlet adjusting valve of a fourth-stage air storage chamber, sending an instruction of opening a bypass adjusting valve of a fourth-stage air expander to a second preset opening degree, sending an instruction of fully opening a heat-storage medium side inlet isolating valve of the first-stage reheater and a heat-storage medium side outlet isolating valve of the first-stage reheater, sending an instruction of fully opening a heat-storage medium side inlet isolating valve of the second-stage reheater and a heat-storage medium side outlet isolating valve of the second-stage reheater, sending an instruction of fully opening a heat-storage medium side inlet isolating valve of the third-stage reheater and a heat-storage medium side outlet isolating valve of the third-stage reheater, sending out an instruction of fully opening a fourth-stage inter-stage reheater heat storage medium side inlet isolation valve and a fourth-stage reheater heat storage medium side outlet isolation valve, and sending out an instruction of automatically controlling a first-stage inter-stage reheater heat storage medium side inlet adjusting valve, a second-stage inter-stage reheater heat storage medium side inlet adjusting valve, a third-stage inter-stage reheater heat storage medium side inlet adjusting valve and a fourth-stage reheater heat storage medium side inlet adjusting valve to respectively input a first-stage inter-stage reheater outlet air temperature, a second-stage inter-reheater outlet air temperature, a third-stage inter-stage reheater outlet air temperature and a fourth-stage inter-stage reheater outlet air temperature;
Step D135, judging whether the current state of the current target control object completely meets all the conditions in the forty-sixth condition group, if not, executing step D136; if yes, go to step D137;
wherein each condition in the forty-sixth condition group includes:
1) The outlet isolation valves of the fourth-stage air storage chamber are all in an open state;
2) The inlet cut-off valves of the fourth-stage air expander are all in an open state;
3) The fourth stage inter-stage reheater outlet air pressure and the fourth stage inter-stage reheater outlet air temperature meet the fourth stage air expander starting air intake requirement;
step D136, sending an instruction of fully opening an outlet isolation valve of the fourth-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the fourth-stage air expansion machine, and waiting for the outlet air pressure of the fourth-stage inter-stage reheater and the outlet air temperature of the fourth-stage inter-stage reheater to meet the starting air intake requirement of the fourth-stage air expansion machine;
step D137, judging whether the bypass regulating valves of the fourth-stage air expander are all in a closed state, and if not, executing the step D138; if yes, go to step D139;
step D138, sending a command of fully closing the bypass adjusting valve of the fourth-stage air expander;
step D139, judging whether the current state of the current target control object completely meets all the conditions in the forty-seventh condition group, if not, executing step D140;
Wherein each condition in the forty-seventh condition group includes:
1) The inlet regulating valve of the fourth-stage air expander is automatically controlled by the rotating speed of the rotor of the fourth-stage air expander;
2) The rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are increased to a first preset speed according to a first preset acceleration rate;
3) The first clutch, the second clutch and the third clutch are already in an engaged state;
and D140, sending an instruction of automatically controlling the rotor speed of the fourth-stage air expander by switching an inlet regulating valve of the fourth-stage air expander, waiting for the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander to rise to a first preset speed according to a first preset acceleration rate, and enabling the first clutch, the second clutch and the third clutch to be in a meshed state.
If the current state of the current target control object is judged and obtained to completely meet all the conditions in the forty-seventh condition group through the step D139, executing a step D141;
step D141, judging whether the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are increased to a second preset speed according to a second preset acceleration rate, and if yes, executing step D142;
Step D142, determining whether the current state of the current target control object completely satisfies all the conditions in the forty-eighth condition group, if yes, executing step D143;
wherein each condition in the forty-eighth condition group comprises:
1) The duration in which the current state of the current target control object completely satisfies all the conditions in the forty-seventh condition group has been delayed by a second preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D143, judging whether the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are increased to a third preset speed according to a third preset acceleration rate, if so, executing step D144;
step D144, judging whether the current state of the current target control object completely meets all the conditions in the forty-ninth condition group, if so, executing step D145;
wherein each condition in the forty-ninth condition group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the forty-eighth condition group is delayed by a third preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D145, judging whether the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander, the rotating speed of the rotor of the third-stage air expander and the rotating speed of the rotor of the fourth-stage air expander are increased to a fourth preset rotating speed according to a fourth preset acceleration rate, if yes, executing step D146;
step D146, determining whether the current state of the current target control object completely satisfies all conditions in the fifteenth condition group, if yes, executing step D147;
wherein each condition in the fifteenth condition group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the forty-ninth condition group is delayed by a fourth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D147, judging whether the current state of the current target control object completely meets all the conditions in the fifty-th condition group, if not, executing step D148; if yes, go to step D149;
wherein each condition in the fifty-th condition group includes:
1) The generator is already connected to the grid;
2) The inlet regulating valve of the fourth-stage air expander is put into the unit for automatic load control;
step D148, sending a generator grid-connection instruction, and sending an instruction for putting an inlet regulating valve of a fourth-stage air expander into unit load automatic control;
step D149, judging whether the load of the unit is increased to a first preset load proportion, if so, executing the step D150;
step D150, judging whether the current state of the current target control object completely meets all the conditions in the fifty-second condition group, if so, executing step D151;
wherein each condition in the fifty-second condition group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the fifty-th condition group is delayed by a fifth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D151, judging whether the unit load is increased to a second preset load proportion, if so, executing step D152;
step D152, judging whether the current state of the current target control object completely meets all the conditions in the fifty-third component group, if so, finishing all the starting steps of the expansion power generation system;
Wherein each condition in the fifty-third group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the fifty-th condition group is delayed by a sixth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements.
In an embodiment of the expansion power generation method for a compressed air energy storage power station, referring to fig. 4, the following is further included after the step 2000:
step 3000: and controlling the load of the target control object to be reduced to a preset extremely low value, fully closing the inlet cut-off valve and the inlet regulating valve of each stage of air expansion machine and triggering the reverse power protection of the generator.
Step 4000: and stopping the target control object.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, the step 3000 specifically includes the following steps:
step 201, judging whether the load of the current target control object is reduced to a third preset load proportion, if so, executing step 202;
step 202, judging whether the current state of the current target control object completely meets all conditions in the fifty-fourth group, if not, executing step 203;
Wherein each condition in the fifty-fourth group includes:
1) The first stage air expander inlet cut-off valve, the second stage air expander inlet cut-off valve, the third stage air expander inlet cut-off valve and the fourth stage air expander inlet cut-off valve are all in a closed state;
2) The inlet regulating valve of the first-stage air expander, the inlet regulating valve of the second-stage air expander, the inlet regulating valve of the third-stage air expander and the inlet regulating valve of the fourth-stage air expander are all in a closed state;
3) The first-stage air storage chamber outlet isolation valve, the second-stage air storage chamber outlet isolation valve, the third-stage air storage chamber outlet isolation valve and the fourth-stage air storage chamber outlet isolation valve are all in a closed state;
4) The outlet regulating valve of the first-stage air storage chamber, the outlet regulating valve of the second-stage air storage chamber, the outlet regulating valve of the third-stage air storage chamber and the outlet regulating valve of the fourth-stage air storage chamber are all in a closed state;
5) The first stage air expander bypass regulating valve, the second stage air expander bypass regulating valve, the third stage air expander bypass regulating valve and the fourth stage air expander bypass regulating valve are all in an open state;
6) The heat storage medium side inlet isolation valve of the first-stage interstage reheater, the heat storage medium side outlet isolation valve of the first-stage interstage reheater, the heat storage medium side inlet isolation valve of the second-stage interstage reheater, the heat storage medium side outlet isolation valve of the second-stage interstage reheater, the heat storage medium side inlet isolation valve of the third-stage interstage reheater, the heat storage medium side outlet isolation valve of the third-stage interstage reheater, the heat storage medium side inlet isolation valve of the fourth-stage interstage reheater and the heat storage medium side outlet isolation valve of the fourth-stage interstage reheater are all in a closed state;
7) The first-stage interstage reheater heat storage medium side inlet adjusting valve, the second-stage interstage reheater heat storage medium side inlet adjusting valve, the third-stage interstage reheater heat storage medium side inlet adjusting valve and the fourth-stage interstage reheater heat storage medium side inlet adjusting valve are all in a closed state;
8) The generator reverse power protection is triggered;
step 203, sending out an instruction of fully closing the first-stage air expander inlet cut-off valve, the second-stage air expander inlet cut-off valve, the third-stage air expander inlet cut-off valve and the fourth-stage air expander inlet cut-off valve, sending out an instruction of fully closing the first-stage air expander inlet regulating valve, the second-stage air expander inlet regulating valve, the third-stage air expander inlet regulating valve and the fourth-stage air expander inlet regulating valve, sending out an instruction of fully closing the first-stage air storage chamber outlet isolating valve, the second-stage air storage chamber outlet isolating valve, the third-stage air storage chamber outlet isolating valve and the fourth-stage air storage chamber outlet regulating valve, sending out an instruction of fully closing the first-stage air storage chamber outlet regulating valve, the second-stage air expander bypass regulating valve, the third-stage air expander bypass regulating valve and the fourth-stage air expander bypass regulating valve, sending out an instruction of fully closing a first-stage inter-stage reheater heat-storage medium side inlet isolation valve and a first-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction of fully closing a second-stage inter-stage reheater heat-storage medium side inlet isolation valve and a second-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction of fully closing a third-stage inter-stage reheater heat-storage medium side inlet isolation valve and a third-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction of fully closing a fourth-stage inter-reheater heat-storage medium side inlet isolation valve and a fourth-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction of fully closing a first-stage inter-stage reheater heat-storage medium side inlet adjustment valve, a second-stage inter-reheater heat-storage medium side inlet adjustment valve, a third-stage inter-reheater heat-storage medium side inlet adjustment valve and a fourth-stage inter-reheater heat-storage medium side inlet adjustment valve Commanding the valve and waiting for generator reverse power protection to trigger.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, the first implementation manner of the step 4000 specifically includes the following contents:
if the current state of the current target control object is judged and known to completely meet all the conditions in the fifty-fourth condition group through the step 202, executing a step A204;
step A204, judging whether the frequency of the frequency converter of the operated high-temperature heat storage medium pump is reduced to a first preset frequency, if not, executing step A205; if yes, go to step A206;
step A205, sending an instruction that the frequency of a frequency converter of an operated high-temperature heat storage medium pump is reduced to a first preset frequency;
step A206, judging whether the high-temperature heat storage medium pump which is not operated releases the starting of the standby pump interlocking, if not, executing step A207; if yes, go to step A208;
step A207, sending an instruction for releasing the interlocking of the standby pump from starting when the high-temperature heat storage medium pump is not operated;
step A208, judging whether the outlet isolation valves of the operated high-temperature heat storage medium pump are all in a closed state, if not, executing step A209; if yes, go to step A210;
step A209, sending an instruction of fully closing an outlet isolation valve of the running high-temperature heat storage medium pump;
Step A210, judging whether the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump are stopped, if not, executing step A211; if yes, go to step A212;
step A211, sending an instruction for stopping the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump;
step a212, determining whether the current state of the current target control object completely meets all the conditions in the fifty-fifth condition group, if not, executing step a213; if yes, go to step A214;
wherein each condition in the fifty-fifth set of conditions comprises:
1) The first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve are both in a closed state;
2) The first conventional nitrogen sealing device inlet isolation valve and the second conventional nitrogen sealing device inlet isolation valve are both in a closed state;
step A213, sending out an instruction of fully closing the first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve, and sending out an instruction of fully closing the first conventional nitrogen sealing device inlet isolation valve and the second conventional nitrogen sealing device inlet isolation valve;
step a214, determining whether the duration of the current state of the current target control object completely satisfying all the conditions in the fifty-fifth condition group has delayed by a seventh preset time, if yes, executing step a215;
Step A215, judging whether the current state of the current target control object completely meets all the conditions in the fifty-sixth condition group, if not, executing step A216; if yes, ending the first parallel flow;
wherein each condition in the fifty-sixth condition group comprises:
1) The first high-temperature heat storage medium pump cooling water inlet isolation valve and the first high-temperature heat storage medium pump cooling water outlet isolation valve are both in a closed state;
2) The cooling water inlet isolation valve of the second high-temperature heat storage medium pump and the cooling water outlet isolation valve of the second high-temperature heat storage medium pump are both in a closed state;
step A216, sending an instruction of fully closing the cooling water inlet isolation valve and the cooling water outlet isolation valve of the first high-temperature heat storage medium pump, and sending an instruction of fully closing the cooling water inlet isolation valve and the cooling water outlet isolation valve of the second high-temperature heat storage medium pump.
In an embodiment of the expansion power generation method for the compressed air energy storage power station, the second implementation manner of the step 4000 specifically includes the following contents:
if the current state of the current target control object is judged and known to completely meet all the conditions in the fifty-fourth condition group through the step 202, executing a step B204;
Step B204, judging whether the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander, the rotating speed of the rotor of the third-stage air expander and the rotating speed of the rotor of the fourth-stage air expander are idled to 0rpm, if so, executing step B205;
step B205, determining whether the current state of the current target control object completely meets all the conditions in the fifty-seventh condition group, if not, executing step B206; if yes, go to step B207;
wherein each condition in the fifty-seventh condition group includes:
1) The first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are all in a closed state;
2) The first air storage chamber is used for sealing the air outlet isolation valve of the air expansion machine, the second air storage chamber is used for sealing the air outlet isolation valve of the air expansion machine, the third air storage chamber is used for sealing the air outlet isolation valve of the air expansion machine, and the fourth air storage chamber is used for sealing the air outlet isolation valve of the air expansion machine;
step B206, sending an instruction for fully closing the first-stage air expander sealing air inlet isolation valve, the second-stage air expander sealing air inlet isolation valve, the third-stage air expander sealing air inlet isolation valve and the fourth-stage air expander sealing air inlet isolation valve, and sending an instruction for fully closing the first-stage air storage chamber sealing air outlet isolation valve, the second-stage air storage chamber sealing air expander sealing air outlet isolation valve, the third-stage air storage chamber sealing air expander sealing air outlet isolation valve and the fourth-stage air storage chamber sealing air expander sealing air outlet isolation valve;
Step B207, determining whether the current state of the current target control object meets at least one condition in the fifty-eighth condition group, if yes, executing step B208;
wherein each condition in the fifty-eighth condition group includes:
1) The rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are delayed for the duration of the idling to 0rpm by the eighth preset time;
2) The bearing temperature of the first end of the gear box reducer, the bearing temperature of the second end of the gear box reducer, the bearing temperature of the first end of the first air expander, the bearing temperature of the second end of the first air expander, the bearing temperature of the first end of the second air expander, the bearing temperature of the second end of the second air expander, the bearing temperature of the first end of the third air expander, the bearing temperature of the second end of the third air expander, the bearing temperature of the first end of the fourth air expander, the bearing temperature of the second end of the fourth air expander, the oil return temperature of the first clutch lubricating oil, the oil return temperature of the second clutch lubricating oil and the oil return temperature of the third clutch lubricating oil are all smaller than a first preset temperature;
Step B208, judging whether the AC lubricating oil pump and the DC accident oil pump which are not operated have released the starting of the standby pump interlocking, if not, executing step B209; if yes, go to step B210;
step B209, sending an instruction for unlocking the standby pump interlock when the AC lubricating oil pump and the DC accident oil pump are not operated;
step B210, judging whether the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump are stopped, if not, executing step B211; if yes, go to step B212;
step B211, sending out an instruction for stopping the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump;
step B212, judging whether the current state of the current target control object completely meets all the conditions in the fifty-ninth condition group, if not, executing the step B213; if yes, the second parallel flow is ended;
wherein each condition in the fifty-ninth condition group includes:
1) The main isolating valve of the isolating air inlet of each stage of air expander is in a closed state;
2) The first stage air expander isolation air inlet isolation valve, the second stage air expander isolation air inlet isolation valve, the third stage air expander isolation air inlet isolation valve and the fourth stage air expander isolation air inlet isolation valve are all in a closed state;
3) The first lubricating oil cooling water inlet isolating valve, the second lubricating oil cooling water inlet isolating valve V48, the first lubricating oil cooling water outlet isolating valve and the second lubricating oil cooling water outlet isolating valve are all in a closed state;
and step B213, sending out an instruction of fully closing the isolating air inlet main valve of each stage of air expander, sending out an instruction of fully closing the isolating air inlet isolating valve of the first stage of air expander, the isolating air inlet isolating valve of the second stage of air expander, the isolating air inlet isolating valve of the third stage of air expander and the isolating air inlet isolating valve of the fourth stage of air expander, sending out an instruction of fully closing the isolating valve of the first lubricating oil cooling water inlet and the isolating valve of the second lubricating oil cooling water inlet, and sending out an instruction of fully closing the isolating valve of the first lubricating oil cooling water outlet and the isolating valve of the second lubricating oil cooling water outlet.
That is, the operation control method of the expansion power generation system applied to the energy release stage of the compressed air energy storage power station comprises the following steps:
judging whether 1) the 1 st to N stages of the air compressor are stopped; 2) 1-N grade air storage chamber outlet adjusting valve, 1-N grade air expansion machine sealing air inlet isolating valve, 1-N grade air storage chamber outlet isolating valve, and 1-N grade air storage chamber air supply expansion machine sealing air outlet isolating valve are completely closed; 3) The pressure and the gas storage temperature of the 1 st-N stage gas storage chamber are normal; 4) The liquid level of the lubricating oil tank is normal; 5) The air supply pressure of the conventional nitrogen making system is normal; 6) The isolating main valve of the isolating air inlet of each stage of air expander and the isolating valves of the isolating air inlets of the 1 st to the N th stages of air expanders are fully opened; 7) The inlet isolation valves of the first and second conventional nitrogen sealing devices are fully opened; 8) The air supply pressure of the isolated air of the 1 st-N stage air expander is normal; 9) The liquid levels of the high-temperature heat storage medium tank and the low-temperature heat storage medium tank and the pressure of the high-temperature heat storage medium tank and the low-temperature heat storage medium tank are normal; 10 Normal pressure and temperature of water supplied by a conventional factory cooling water system; 11 First and second lubricating oil cooling water inlet isolation valves, first and second lubricating oil cooling water outlet isolation valves, first high temperature heat storage medium pump cooling water inlet and outlet isolation valves, and second high temperature heat storage medium pump cooling water inlet and outlet isolation valves are fully opened. If any one of the eleven conditions is not met or any plurality of conditions are not met, sending an instruction for stopping the 1 st to Nth-stage air compressor, sending an instruction for fully closing the 1 st to Nth-stage air storage chamber outlet regulating valve, sending an instruction for fully closing the 1 st to Nth-stage air expansion machine sealing air inlet isolating valve, sending an instruction for fully closing the 1 st to Nth-stage air storage chamber outlet isolating valve, sending an instruction for fully closing the 1 st to Nth-stage air storage chamber air expansion machine sealing air outlet isolating valve, and sending an instruction for fully opening the air expansion machine isolating air inlet isolating main valve of each stage, sending the order of opening 1 ~ N grade fully the air expander keeps apart wind import isolating valve, sending the order of opening first, the conventional nitrogen gas sealing device import isolating valve of second entirely, sending the order of opening first, the second lubricating oil cooling water import isolating valve entirely, sending the order of opening first, the second lubricating oil cooling water export isolating valve entirely, sending the order of opening first high temperature heat-retaining medium pump cooling water and advancing, export isolating valve entirely, sending the order of opening second high temperature heat-retaining medium pump cooling water and advancing, export isolating valve entirely to wait for following each value to normal value, include: the pressure and the temperature of the 1 st to N-grade air storage chambers, the liquid level of the lubricating oil tanks, the air supply pressure of a conventional nitrogen production system, the air supply pressure of the 1 st to N-grade air expanders for isolating wind, the liquid levels of the high-temperature and low-temperature heat storage medium tanks, the pressures of the high-temperature and low-temperature heat storage medium tanks, and the water supply pressure and temperature of a conventional factory cooling water system.
If the above conditions are met, determining whether 1) the first or second fume extractor fan has been activated; 2) The temperature of the oil tank electric heater is automatically controlled after the oil tank electric heater is put into the lubricating oil tank; 3) The lubricant purifying device has been started. If any one of the three conditions is not met or any multiple conditions are not met, an instruction for starting the first or second fume exhaust fan is sent, an instruction for automatically controlling the temperature of the oil tank electric heater in the lubricating oil tank is sent, and an instruction for starting the lubricating oil purification device is sent.
If the above conditions are met, judging whether the un-started fume exhaust fan is put into the starting standby fan interlocking. And if the un-started fume exhaust fan is not put into the startup standby fan interlocking, sending an instruction of putting the un-started fume exhaust fan into the startup standby fan interlocking.
And if the oil fume exhaust fan is not started and the standby fan is started for interlocking, judging whether the first or second alternating-current lubricating oil pump is started or not. And if the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump are not started, sending a command for starting the first alternating-current lubricating oil pump or the second alternating-current lubricating oil pump.
And if the first or second alternating-current lubricating oil pump is started, judging whether the un-started alternating-current lubricating oil pump and the direct-current emergency oil pump are put into starting standby pump interlocking. And if the AC lubricating oil pump is not started or the DC accident oil pump is not put into the starting standby pump interlock, sending an instruction that the AC lubricating oil pump is not started and the DC accident oil pump is put into the starting standby pump interlock.
If the AC lubricating oil pump and the DC accident oil pump are not started and the starting standby pump is put into interlocking, judging whether 1) the lubricating oil pressure regulating valve is put into lubricating oil and supplying pressure automatic control; 2) The temperature of the lubricating oil temperature regulating valve is automatically controlled by the temperature of the fed lubricating oil. If any one of the two conditions is not satisfied, or the two conditions are not satisfied, an instruction for automatically controlling the input lubricating oil supply pressure of the lubricating oil pressure regulating valve is sent out, and an instruction for automatically controlling the input lubricating oil supply temperature of the lubricating oil temperature regulating valve is sent out.
If the conditions are met, judging whether 1) the first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve are opened to a first preset opening degree; 2) The first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve are fully opened; 3) The high-temperature heat storage medium pump recirculation isolation valve and the regulating valve are fully opened; 4) The 1 st-N stage reheater heat storage medium side inlet isolation valve is fully opened; 5) The 1 st-N stage of the heat storage medium side inlet adjusting valve of the interstage reheater is fully opened; 6) And the 1 st-N stage reheater heat storage medium side outlet isolation valves are fully opened. If any one of the six conditions is not met or any multiple conditions are not met, sending out a command of opening the inlet isolation valve of the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump to a first preset opening degree, sending out a command of fully opening the outlet isolation valve of the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump, sending out a command of fully opening the recirculation isolation valve and the regulating valve of the high-temperature heat storage medium pump, sending out a command of fully opening the 1 st to N th-stage heat storage medium side inlet isolation valve of the interstage reheater, sending out a command of fully opening the 1 st to N th-stage reheater heat storage medium side outlet isolation valve of the interstage reheater.
In an embodiment, the first predetermined opening degree may be 5%, and the specific implementation may be determined according to the actual situation.
And if the conditions are met, judging whether the first preset time is delayed or not, or receiving an instruction for manually confirming the emptying and preheating completion of the heat storage medium subsystem.
In an embodiment, the first predetermined time may be 10 minutes, which may be determined according to the actual implementation.
If the delayed first preset time is up, or an emptying and preheating completion instruction of the heat storage medium subsystem is confirmed manually, judging whether 1) the inlet isolation valves of the first and second high-temperature heat storage medium pumps are fully opened; 2) The first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve are completely closed; 3) And the 1 st-N stage reheater heat storage medium side inlet isolation valve, the inlet adjusting valve and the outlet isolation valve are completely closed. If any one of the three conditions is not met or any multiple conditions are not met, sending out a command of fully opening the inlet isolation valve of the first high-temperature heat storage medium pump and the inlet isolation valve of the second high-temperature heat storage medium pump, sending out a command of fully closing the outlet isolation valve of the first high-temperature heat storage medium pump and the outlet isolation valve of the first high-temperature heat storage medium pump, and sending out a command of fully closing the 1 st to N th stages of heat storage medium side inlet isolation valve, the inlet adjusting valve and the outlet isolation valve of the interstage reheater.
And if the conditions are met, judging whether the first or the second high-temperature heat storage medium pump is started. And if the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump are not started, sending a command for starting the first high-temperature heat storage medium pump or the second high-temperature heat storage medium pump.
And if the first or the second high-temperature heat storage medium pump is started, judging whether the outlet isolation valve of the high-temperature heat storage medium pump which is started is fully opened or not. And if the high-temperature heat storage medium pump outlet isolation valve is started and is not fully opened, sending a command of fully opening the high-temperature heat storage medium pump outlet isolation valve.
And if the high-temperature heat storage medium pump outlet isolation valve is started and is fully opened, judging whether the high-temperature heat storage medium pump is not started and the backup pump is started for interlocking. And if the high-temperature heat storage medium pump is not started and the starting backup pump interlock is not put into use, sending a command of not starting the high-temperature heat storage medium pump to put into the starting backup pump interlock.
And if the high-temperature heat storage medium pump is not started and the starting backup pump is interlocked, judging whether the outlet isolation valve of the high-temperature heat storage medium pump is not started and is fully opened. And if the high-temperature heat storage medium pump outlet isolation valve is not started, sending a command that the high-temperature heat storage medium pump outlet isolation valve is not started to be fully opened.
If the high-temperature heat storage medium pump outlet isolation valve is not started and is fully opened, judging whether 1) the high-temperature heat storage medium pump recirculation regulating valve is used for automatically controlling the flow of the heat storage medium at the outlet of the 1 st-N-stage interstage reheater and the recirculation flow of the high-temperature heat storage medium pump; 2) The frequency converter which starts the high-temperature heat storage medium pump is automatically controlled by the outlet pressure of the high-temperature heat storage medium pump which is put into the outlet pipeline of the frequency converter. And if any one of the two conditions is not met or the two conditions are not met, sending an instruction for automatically controlling the flow of the heat storage medium which is input into the outlet of the 1 st-N-stage interstage reheater by the high-temperature heat storage medium pump recirculation regulating valve and the recirculation flow of the high-temperature heat storage medium pump, and sending an instruction for automatically controlling the outlet pressure of the high-temperature heat storage medium pump which is input into the outlet pipeline of the high-temperature heat storage medium pump by the frequency converter which starts the high-temperature heat storage medium pump.
If the conditions are met, taking the W-level operation working condition as an example, judging whether 1) the W-level air storage chamber is fully opened for sealing the air outlet isolation valve of the air expansion machine; 2) The 1 st-W stage air expander sealing air inlet isolation valve is fully opened; 3) The W + 1-N stage air expansion machine sealing air inlet isolation valve is completely closed; 4) The first to # W-1 clutches have been placed in a locked state; 5) # W the clutch has been placed in the unlocked state. If any one of the five conditions is not met or any multiple of the five conditions are not met, sending out an instruction for fully opening the W-th air storage chamber for the air expander sealed air outlet isolating valve, sending out an instruction for fully opening the 1 st to W-th air expander sealed air inlet isolating valve, sending out an instruction for fully closing the W +1 st to N-th air expander sealed air inlet isolating valve, sending out an instruction for locking the first to # W-1 clutches, and sending out an instruction for unlocking the # W clutch.
If the conditions are met, judging whether 1) the air supply pressure of the sealing air of the 1 st-W-stage air expander is normal; 2) The air supply pressure of the isolated air of the 1 st-W-level air expander is normal; 3) The lubricating oil supply pressure is normal and the differential pressure of the lubricating oil filter is not alarmed; 4) The temperature of bearings at two ends of the generator and the temperature of bearings at two ends of the reducer of the gear box are normal; 5) The temperature of bearings at two ends of the 1 st-W-stage air expander is normal; 6) The temperature of the three-phase coil of the generator is normal; 7) The return oil temperature of bearing lubricating oil at two ends of the 1 st-W stage air expander and the return oil temperature of lubricating oil of the first to # W clutches are normal; 8) Shaft vibration at two ends of the generator, shaft vibration at two ends of a reducer of the gear box and shaft vibration at two ends of the 1 st-W-level air expander are normal; 9) The shaft displacement of the 1 st-W stage air expander and the shaft displacement of the first- # W clutch are normal; 10 The first to # W clutch shafts are not normal for the middle amount.
If the conditions are met, judging whether 1) the 1 st to W-th first-stage air expansion machine inlet cut-off valve and the adjusting valve are fully opened; 2) The W-stage air expander inlet shut-off valve and the regulating valve are completely closed; 3) 1 st to W-first stage the air expander bypass damper is fully closed. If any one of the three conditions is not met or any multiple of the three conditions are not met, sending a command of fully opening the 1 st to W-first stage air expansion machine inlet shut-off valve, sending commands of fully opening the 1 st to W-first stage air expansion machine inlet adjusting valves V3 and V7, sending commands of fully closing the W-th stage air expansion machine inlet shut-off valve and adjusting valve V11, and sending commands of fully closing the 1 st to W-first stage air expansion machine bypass adjusting valve.
If the conditions are met, judging whether 1) the W-th air storage chamber outlet regulating valve is put into the W-th inter-stage reheater outlet air pressure (the pressure set value automatically follows the load change of the inter-stage reheated air expansion generator set) for automatic control; 2) The W-stage bypass adjusting valve of the air expansion machine is opened to a second preset opening degree; 3) The 1 st-W stage reheater heat storage medium side inlet and outlet isolation valves are fully opened; 4) 1 st-W stage the heat storage medium side inlet regulating valves of the interstage reheaters are respectively put into 1 st-W stage interstage reheater outlet air temperature automatic control. If any one of the four conditions is not met or any multiple conditions are not met, sending an instruction of automatically controlling the pressure of air at the outlet of the W-th-stage gas storage chamber when the outlet regulating valve of the W-th-stage gas storage chamber is put into the outlet of the W-th-stage reheater, sending an instruction of opening the W-th-stage bypass regulating valve of the air expander to a second preset opening degree, sending an instruction of fully opening the 1 st-W-stage reheater heat-storage medium side inlet and outlet isolating valves, and sending instructions of respectively putting the 1 st-W-stage reheater heat-storage medium side inlet regulating valves into the 1 st-W-stage reheater outlet air temperature automatic control.
In an embodiment, the second predetermined opening may be 50%, and the specific implementation may be determined according to the actual situation.
If the conditions are met, judging whether 1) the W-th air storage chamber outlet isolating valve is fully opened or not; 2) The W-stage air expansion machine inlet shut-off valve is fully opened; 3) And the W-stage interstage reheater outlet air pressure and temperature meet the start-up air intake requirement of the W-stage air expansion machine. If any one of the three conditions is not met or any multiple conditions are not met, sending a command of fully opening the W-th-stage air storage chamber outlet isolation valve, sending a command of fully opening the W-th-stage air expansion machine inlet cut-off valve, and waiting for the W-th-stage interstage reheater outlet air pressure and temperature to meet the W-th-stage air expansion machine starting air intake requirement.
And if the conditions are met, judging whether the W-th stage bypass adjusting valve of the air expansion machine is completely closed. If the W-th stage air expander bypass damper is not fully closed, issuing a command to fully close the W-th stage air expander bypass damper.
If the W-th stage bypass regulating valve of the air expansion machine is completely closed, judging whether 1) the W-th stage inlet regulating valve of the air expansion machine is put into automatic control of the rotating speed of a W-th stage air expansion machine rotor; 2) The rotating speed of the rotor of the 1 st-W-stage air expander is increased to a first preset rotating speed according to a first preset acceleration rate; 3) The first to # W-1 clutch is already engaged and the # W clutch is already disengaged. If any one of the three conditions is not met or any multiple conditions are not met, an instruction for automatically controlling the rotating speed of the rotor of the W-th air expander is sent out by the inlet regulating valve of the W-th air expander, the rotating speed of the rotor of the 1 st-W-th air expander is increased to a first preset rotating speed according to a first preset acceleration rate, the clutch is in an engaged state from the first stage to the # W-1 stage, and the clutch is in a disengaged state from the # W stage.
In an embodiment, the first predetermined acceleration rate may be 33000rpm/min, and the first predetermined rotational speed may be 2000rpm, which may be determined according to the actual situation.
And if the conditions are met, judging whether the rotating speed of the rotor of the 1 st-W-stage air expander is increased to a second preset rotating speed according to a second preset acceleration rate.
In an embodiment, the second predetermined acceleration rate may be 12000rpm/min, and the second predetermined rotational speed may be 20000rpm, which may be determined according to the actual situation.
If the rotating speed of the rotor of the 1 st-W-stage air expander is increased to a second preset rotating speed according to a second preset acceleration rate, judging whether 1) the second preset time is delayed; 2) All relevant operation parameters of the unit are normal.
In an embodiment, the second predetermined time may be 6 minutes, which may be determined according to the actual implementation.
And if the conditions are met, judging whether the rotating speed of the rotor of the 1 st-W-stage air expander is increased to a third preset rotating speed according to a third preset acceleration rate.
In an embodiment, the third predetermined acceleration rate may be 33000rpm/min, and the third predetermined rotational speed may be 30000rpm, which may be determined according to the actual situation.
If the rotating speed of the rotor of the 1 st-W-stage air expander is increased to a third preset rotating speed according to a third preset acceleration rate, judging whether 1) the third preset time is delayed; 2) All relevant operation parameters of the unit are normal.
In an embodiment, the third predetermined time may be 6 minutes, which may be determined according to the actual implementation.
And if the conditions are met, judging whether the rotating speed of the rotor of the 1 st-W-stage air expander is increased to a fourth preset rotating speed according to a fourth preset acceleration rate.
In an embodiment, the fourth predetermined acceleration rate may be 6000rpm/min, and the fourth predetermined rotational speed may be 35000rpm, which may be determined according to actual conditions.
If the rotating speed of the rotor of the 1 st-W-stage air expander is increased to a fourth preset rotating speed according to a fourth preset acceleration rate, judging whether 1) the fourth preset time is delayed; 2) All relevant operation parameters of the unit are normal.
In an embodiment, the fourth predetermined time may be 15 minutes, which may be implemented as the case may be.
If the conditions are met, judging whether 1) the generator is connected to the grid; 2) And the W-stage air expansion machine inlet adjusting valve is put into the unit load automatic control. And if any one of the two conditions is not met or the two conditions are not met, sending a command of grid connection of the generator and sending a command of putting the W-level air expander inlet regulating valve into unit load automatic control.
And if the conditions are met, judging whether the load of the unit is increased to a first preset load proportion.
In an embodiment, the first predetermined load ratio may be 15%, and the specific implementation may be determined according to the actual situation.
If the load of the unit rises to the first preset load proportion, judging whether 1) the fifth preset time is delayed; 2) All relevant operation parameters of the unit are normal.
In an embodiment, the fifth predetermined time may be 30 minutes, which may be implemented as the case may be.
And if the conditions are met, judging whether the load of the unit is increased to a second preset load proportion.
In an embodiment, the second predetermined load ratio may be 100%, and the specific implementation may be determined according to the actual situation.
If the load of the unit rises to a second preset load proportion, judging whether 1) the sixth preset time is delayed; 2) All relevant operation parameters of the unit are normal.
In an embodiment, the sixth predetermined time may be 60 minutes, which may be implemented as the case may be.
If the above conditions are all satisfied, the entire startup sequence of the expansion power generation system is ended.
In one embodiment, the operation control method further includes:
And judging whether the unit load is reduced to a third preset load proportion.
In an embodiment, the third predetermined load ratio may be 3%, and the specific implementation may be determined according to the actual situation.
If the load of the unit is reduced to a third preset load proportion, judging whether 1) 1 st to N stages of inlet shut-off valves of the air expansion machine are completely closed; 2) The inlet regulating valve of the 1 st-N stage air expander is completely closed; 3) The 1 st to N stages of the gas storage chamber outlet isolating valves are completely closed; 4) The 1 st to N stages of the air storage chamber outlet regulating valves are completely closed; 5) The 1 st-N stage bypass adjusting valve of the air expander is fully opened; 6) 1 st-N stages of the heat storage medium side and outlet isolating valves of the interstage reheaters are completely closed; 7) The 1 st-N stages of the heat storage medium side inlet adjusting valves of the interstage reheaters are completely closed; 8) The generator reverse power protection is triggered. If any one of the eight conditions is not met or any multiple conditions are not met, sending out an instruction for fully closing the 1 st to N th-stage air expander inlet stop valve, sending out an instruction for fully closing the 1 st to N th-stage air expander inlet regulating valve, sending out an instruction for fully closing the 1 st to N th-stage air storage chamber outlet isolating valve, sending out an instruction for fully closing the 1 st to N th-stage air storage chamber outlet regulating valve, sending out an instruction for fully opening the 1 st to N th-stage air expander bypass regulating valve, sending out an instruction for fully closing the 1 st to N th-stage reheater heat storage medium side inlet and outlet isolating valve, sending out an instruction for fully closing the 1 st to N th-stage reheater heat storage medium side inlet regulating valve, and waiting for triggering of generator reverse power protection.
If the above conditions are all satisfied, the following two parallel processes are performed simultaneously.
(1) A first parallel flow: and judging whether the frequency of the frequency converter which operates the high-temperature heat storage medium pump is reduced to a first preset frequency or not. And if the frequency of the frequency converter which operates the high-temperature heat storage medium pump is not reduced to a first preset frequency, sending an instruction that the frequency of the frequency converter which operates the high-temperature heat storage medium pump is reduced to the first preset frequency.
In one embodiment, the first predetermined frequency may be 15Hz, which may be implemented according to the actual situation. The working frequency of the frequency converter which operates the high-temperature heat storage medium pump is reduced to below 15Hz (inclusive) and then the pump is stopped, so that the impact on a pipeline when the pump is stopped can be reduced.
And if the frequency of the frequency converter which operates the high-temperature heat storage medium pump is reduced to a first preset frequency, judging whether the high-temperature heat storage medium pump which is not operated is unlocked or not. And if the high-temperature heat storage medium pump is not operated and the starting standby pump interlock is not released, sending an instruction that the high-temperature heat storage medium pump is not operated and the starting standby pump interlock is released.
And if the high-temperature heat storage medium pump is not operated, the starting standby pump interlocking is released, and whether the high-temperature heat storage medium pump outlet isolation valve is operated and is completely closed is judged. And if the high-temperature heat storage medium pump outlet isolation valve is not completely closed, sending an instruction of completely closing the high-temperature heat storage medium pump outlet isolation valve.
And if the high-temperature heat storage medium pump outlet isolation valve is completely closed, judging whether the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump are stopped. And if the first or second high-temperature heat storage medium pump is not stopped, sending a command for stopping the first and second high-temperature heat storage medium pumps.
If the first and second high-temperature heat storage medium pumps are shut down, judging whether 1) the inlet isolation valves of the first and second high-temperature heat storage medium pumps are completely closed; 2) The inlet isolation valves of the first and second conventional nitrogen sealing devices are fully closed. And if any one of the two conditions is not met or the two conditions are not met, sending a command of fully closing the inlet isolation valves of the first and second high-temperature heat storage medium pumps and sending a command of fully closing the inlet isolation valves of the first and second conventional nitrogen sealing devices.
And if the conditions are met, judging whether the seventh preset time is delayed.
In an embodiment, the seventh predetermined time may be 15 minutes, which may be implemented as the case may be.
If the seventh preset time is delayed, judging whether 1) the isolating valves of the inlet and the outlet of the cooling water of the first high-temperature heat storage medium pump are closed completely; 2) The isolating valves of the cooling water inlet and outlet of the second high-temperature heat storage medium pump are closed. If any one of the two conditions is not met or the two conditions are not met, an instruction for fully closing the inlet and outlet isolation valves of the cooling water of the first high-temperature heat storage medium pump is sent, and an instruction for fully closing the inlet and outlet isolation valves of the cooling water of the second high-temperature heat storage medium pump is sent.
If the above conditions are all satisfied, the first parallel flow ends.
(2) A second parallel flow:
and judging whether the rotating speed of the rotor of the 1 st-N stage air expander is inerted to 0rpm or not.
If the rotating speed of the rotor of the 1 st-N stage air expander is idled to 0rpm, judging whether 1) the sealing air inlet isolation valve of the 1 st-N stage air expander is completely closed; 2) The 1 st-N stage air storage chamber is completely closed by the air outlet isolating valve for sealing the air expander. If any one of the two conditions is not met or the two conditions are not met, an instruction for fully closing the 1 st-N-stage air expander sealing air inlet isolation valve is sent out, and an instruction for fully closing the 1 st-N-stage air storage chamber air expander sealing air outlet isolation valve is sent out.
If the conditions are met, judging whether the rotating speed of the rotor of the 1 st to N-th stage air expansion machine is slowed down to 0rpm for the eighth preset time or not, or judging whether the temperatures of the bearings at the two ends of the reducer of the gear box, the temperatures of the bearings at the two ends of the 1 st to N-th stage air expansion machine and the return oil temperature of the lubricating oil of the first to # N-1 clutch are smaller than the first preset temperature or not.
In one embodiment, the eighth predetermined time may be 20 minutes, the first predetermined temperature may be 50 ℃, and the specific implementation may be determined according to the actual situation.
And if the rotating speed of the rotor of the 1 st-N stage air expander idles to 0rpm and the eighth preset time is delayed, or the temperature of the bearings at the two ends of the reducer of the gear box, the temperature of the bearings at the two ends of the 1 st-N stage air expander and the return oil temperature of the lubricating oil of the first to # N-1 clutch are lower than the first preset temperature, judging whether the AC lubricating oil pump and the DC accident oil pump are not operated and the starting standby pump interlocking is released. And if the AC lubricating oil pump is not operated or the DC accident oil pump does not release the starting standby pump interlock, sending an instruction for releasing the starting standby pump interlock of the AC lubricating oil pump and the DC accident oil pump.
And if the AC lubricating oil pump is not operated and the DC accident oil pump releases the starting of the standby pump interlocking, judging whether the first AC lubricating oil pump and the second AC lubricating oil pump are stopped. If the first or second AC lubricating oil pump is not stopped, a command for stopping the first or second AC lubricating oil pump is sent.
If the first and second alternating-current lubricating oil pumps are stopped, judging whether 1) the isolating air inlet main isolating valve of each stage of air expander is completely closed;
2) The 1 st-N stage air expansion machine isolation air inlet isolation valve is completely closed; 3) The first and second lubricating oil cooling water inlet isolation valves and the first and second lubricating oil cooling water outlet isolation valves are closed. If any one of the three conditions is not met or any multiple of the three conditions are not met, sending out an instruction for fully closing the isolating air inlet main valve of each stage of air expander, sending out an instruction for fully closing the isolating air inlet isolating valves of the 1 st to N th stages of air expanders, sending out an instruction for fully closing the isolating valves of the first lubricating oil cooling water inlet and the second lubricating oil cooling water outlet, and sending out an instruction for fully closing the isolating valves of the first lubricating oil cooling water outlet and the second lubricating oil cooling water outlet.
If the above conditions are all satisfied, the second parallel flow ends.
And after the first parallel flow and the second parallel flow are finished, finishing the shutdown step of all the expansion power generation systems.
The beneficial effects of the embodiment of the application are that: the embodiment of the application provides an expansion power generation system applied to an energy release stage of a compressed air energy storage power station and a corresponding operation control method thereof, the expansion power generation system realizes the combined operation of an interstage reheating type air expansion power generation unit, a heat storage medium subsystem, a conventional lubricating oil system, a conventional plant cooling water system, a conventional nitrogen production system and a conventional nitrogen sealing device, and realizes that when the grade of an air storage chamber is changed during the variable working condition operation of an energy storage stage, each stage of air expander of the interstage reheating type air expansion power generation unit of the energy release stage expansion power generation system stably operates near a rated working condition point, so that the safe and stable operation of each relevant device is ensured while the operation efficiency of the unit, the system and the whole compressed air energy storage power station is improved. In addition, the expansion power generation system provided by the embodiment of the application can realize automatic start in the full stop state of the energy release stage and automatic stop in the running state; and considering artificial judgment, the jumping operation of the program control logic of the expansion power generation system can be realized, when the operation condition of a certain step of the program control logic is not met, so that the step sequence cannot be carried out, whether the condition can be ignored and the jumping action can be operated or not can be artificially judged, and the operation of the program control logic is continued until the starting or the stopping is finished.
In order to further explain the scheme, the application also provides a specific application example of the operation control of the expansion power generation system, and the execution main body of the operation control method can be a computer control system or a distributed control system. The operation control method mainly comprises the following steps:
step 101, judging whether 1) the first stage air compressor 37, the second stage air compressor 38, the third stage air compressor 39 and the fourth stage air compressor 40 are stopped; 2) A first stage air storage chamber outlet regulating valve V1, a second stage air storage chamber outlet regulating valve V5, a third stage air storage chamber outlet regulating valve V9 and a fourth stage air storage chamber outlet regulating valve V13, a first stage air expander sealing air inlet isolating valve V17, a second stage air expander sealing air inlet isolating valve V18, a third stage air expander sealing air inlet isolating valve V19 and a fourth stage air expander sealing air inlet isolating valve V20, a first stage air storage chamber inlet isolating valve V56, a second stage air storage chamber inlet isolating valve V57, a third stage air storage chamber inlet isolating valve V58 and a fourth stage air storage chamber inlet isolating valve V59, a first stage air storage chamber outlet isolating valve V60, a second stage air storage chamber outlet isolating valve V61, a third stage air storage chamber outlet isolating valve V62 and a fourth stage air storage chamber outlet isolating valve V63, a first stage air storage chamber air expander sealing air outlet isolating valve V64, a second stage air storage chamber air expander sealing air outlet isolating valve V65, a third stage air storage chamber air supply expansion chamber outlet isolating valve V63 and a fourth stage air storage chamber outlet isolating valve V67; 3) The pressure P1 of the first-stage air storage chamber, the pressure P5 of the second-stage air storage chamber, the pressure P9 of the third-stage air storage chamber and the pressure P13 of the fourth-stage air storage chamber, and the air storage temperature T1 of the first-stage air storage chamber, the air storage temperature T5 of the second-stage air storage chamber, the air storage temperature T9 of the third-stage air storage chamber and the air storage temperature T13 of the fourth-stage air storage chamber are normal; 4) The liquid level L1 of the lubricating oil tank is normal; 5) The air supply pressure P33 of the conventional nitrogen making system is normal; 6) The main isolating valve V21 of the isolating air inlet of each stage of air expander, the isolating valve V22 of the isolating air inlet of the first stage of air expander, the isolating valve V23 of the isolating air inlet of the second stage of air expander, the isolating valve V24 of the isolating air inlet of the third stage of air expander and the isolating valve V25 of the isolating air inlet of the fourth stage of air expander are all opened; 7) The first conventional nitrogen seal inlet isolation valve V26 and the second conventional nitrogen seal inlet isolation valve V27 have been fully opened; 8) The first stage air expander isolation air supply pressure P22, the second stage air expander isolation air supply pressure P23, the third stage air expander isolation air supply pressure P24 and the fourth stage air expander isolation air supply pressure P25 are normal; 9) The liquid level L2 of the high-temperature heat storage medium tank, the liquid level L3 of the low-temperature heat storage medium tank, the pressure P26 of the high-temperature heat storage medium tank and the pressure P29 of the low-temperature heat storage medium tank are normal; 10 The water supply pressure P30 and the water supply temperature T32 of the conventional factory cooling water system are normal; 11 First lubricating oil cooling water inlet isolation valve V46 and second lubricating oil cooling water inlet isolation valve V48, and first lubricating oil cooling water outlet isolation valve V47 and second lubricating oil cooling water outlet isolation valve V49, and first high temperature heat storage medium pump cooling water inlet isolation valve V50 and first high temperature heat storage medium pump cooling water outlet isolation valve V51, and second high temperature heat storage medium pump cooling water inlet isolation valve V52 and second high temperature heat storage medium pump cooling water outlet isolation valve V53 have been fully opened. If any of the eleven conditions are not met or if any plurality of conditions are not met, proceeding to step 102, issuing a command to shut down the first stage air compressor 37, the second stage air compressor 38, the third stage air compressor 39 and the fourth stage air compressor 40, issuing a command to fully close the first stage air reservoir outlet trim valve V1, the second stage air reservoir outlet trim valve V5, the third stage air reservoir outlet trim valve V9 and the fourth stage air reservoir outlet trim valve V13, issuing a command to fully close the first stage air expander seal air inlet isolation valve V17, the second stage air expander seal air inlet isolation valve V18, the third stage air expander seal air inlet isolation valve V19 and the fourth stage air expander seal air inlet isolation valve V20, issuing a command to fully close the first stage air reservoir inlet isolation valve V56, the second stage air reservoir inlet isolation valve V57, the third stage air reservoir inlet isolation valve V58 and the fourth stage air reservoir inlet isolation valve V59, sending out an instruction of fully closing a first stage air storage chamber outlet isolation valve V60, a second stage air storage chamber outlet isolation valve V61, a third stage air storage chamber outlet isolation valve V62 and a fourth stage air storage chamber outlet isolation valve V63, sending out an instruction of fully closing a first stage air storage chamber air expander sealing air outlet isolation valve V64, a second stage air storage chamber air expander sealing air outlet isolation valve V65, a third stage air storage chamber air expander sealing air outlet isolation valve V63 and a fourth stage air storage chamber air expander sealing air outlet isolation valve V67, sending out an instruction of fully opening each stage air expander isolation air inlet isolation main valve V21, sending out an instruction of fully opening a first stage air expander isolation air inlet isolation valve V22, a third stage air expander isolation air inlet isolation valve V23, a fourth stage air expander isolation air inlet isolation valve V24 and a fourth stage air expander isolation air inlet isolation valve V25, sending a command of fully opening a first conventional nitrogen sealing device inlet isolating valve V26 and a second conventional nitrogen sealing device inlet isolating valve V27, sending a command of fully opening a first lubricating oil cooling water inlet isolating valve V46 and a second lubricating oil cooling water inlet isolating valve V48, sending a command of fully opening a first lubricating oil cooling water outlet isolating valve V47 and a second lubricating oil cooling water outlet isolating valve V49, sending a command of fully opening a first high-temperature heat storage medium pump cooling water inlet isolating valve V50 and a first high-temperature heat storage medium pump cooling water outlet isolating valve V51, sending a command of fully opening a second high-temperature heat storage medium pump cooling water inlet isolating valve V52 and a second high-temperature heat storage medium pump cooling water outlet isolating valve V53, and waiting for the following values to reach normal values, wherein the command comprises the following steps: the pressure of the first-stage gas storage chamber P1, the pressure of the second-stage gas storage chamber P5, the pressure of the third-stage gas storage chamber P9 and the pressure of the fourth-stage gas storage chamber P13, the gas storage temperature of the first-stage gas storage chamber T1, the gas storage temperature of the second-stage gas storage chamber T5, the gas storage temperature of the third-stage gas storage chamber T9 and the gas storage temperature of the fourth-stage gas storage chamber T13, the liquid level of the lubricating oil tank L1, the gas supply pressure of the conventional nitrogen production system P33, the wind-isolated gas supply pressure of the first-stage air expander P22, the wind-isolated gas supply pressure of the second-stage air expander P23, the wind-isolated gas supply pressure of the third-stage air expander P24, the wind-isolated gas supply pressure of the fourth-stage air expander P25, the liquid level of the high-temperature heat storage medium tank L2, the liquid level of the low-temperature heat storage medium tank L3, the pressure of the high-temperature heat-storage medium tank P26, the low-temperature heat-storage medium tank P29, the water supply pressure of the conventional plant cooling water system P30 and the conventional plant cooling water supply temperature T32. If the above conditions are all satisfied, step 103 is performed.
The steps 101 and 102 are performed to meet the requirements of the expansion power generation system starting control step on system isolation, a gas storage chamber, a conventional lubricating oil system, a conventional nitrogen generation system, a high-temperature heat storage medium tank, a low-temperature heat storage medium tank and a conventional plant cooling water system.
Step 103, judging whether 1) the first oil smoke exhaust fan 24 or the second oil smoke exhaust fan 25 is started; 2) The temperature T33 of the oil tank electric heater 22 which is put into the lubricating oil tank is automatically controlled; 3) The lubricant oil purifying device 23 has been started. If any one of the three conditions is not met or any more conditions are not met, step 104 is performed, an instruction for starting the first fume exhaust fan 24 or the second fume exhaust fan 25 is issued, an instruction for automatically controlling the temperature T33 of the lubricating oil tank electric heater 22 to be put into the lubricating oil tank is issued, and an instruction for starting the lubricating oil purifying device 23 is issued. If both of the above conditions are satisfied, step 105 is performed.
And 105, judging whether the un-started fume exhaust fan is interlocked with the started standby fan. If the unactivated fume exhaust fan is not put into the startup standby fan interlock, the step 106 is performed to send an instruction that the unactivated fume exhaust fan is put into the startup standby fan interlock. If the un-activated range hood fan has been placed into the activated backup fan interlock, step 107 is performed.
Steps 103 to 106 are performed in order to prepare for the start-up of the ac lubricating oil pump.
Step 107, judging whether the first alternating current lubricating oil pump 19 or the second alternating current lubricating oil pump 20 is started. If the first ac lubricating oil pump 19 and the second ac lubricating oil pump 20 are not started, step 108 is performed, and a command for starting the first ac lubricating oil pump 19 or the second ac lubricating oil pump 20 is issued. If the first ac lubricating oil pump 19 or the second ac lubricating oil pump 20 is started, step 109 is performed.
Step 109, determine if the un-started ac lube pump and dc accident oil pump 21 have been put into startup backup pump interlock. If the ac lubricating oil pump is not started or the dc accident oil pump 21 is not put into the starting backup pump interlock, step 110 is performed to issue an instruction that the ac lubricating oil pump is not started and the dc accident oil pump 21 is put into the starting backup pump interlock. If the ac lube pump is not started and the dc accident pump 21 has been put into a startup reserve pump interlock, step 111 is performed.
Step 111, judging whether 1) the lubricating oil pressure regulating valve V54 is automatically controlled by the lubricating oil feeding pressure P32; 2) The lubricating oil temperature regulating valve V55 has been put into automatic control of the lubricating oil supply temperature T34. If either or both of the above conditions are not satisfied, the process proceeds to step 112, where an instruction to automatically control the pressure P32 at which the oil pressure regulating valve V54 is put into the lubricating oil supply and an instruction to automatically control the temperature T34 at which the oil temperature regulating valve V55 is put into the lubricating oil supply are issued. If the above conditions are all satisfied, step 113 is performed.
Steps 107 to 112 are performed to complete the start of the ac lubricating oil pump and put into the conventional lubricating oil system for interlocking and automation, so as to meet the requirements of the interstage reheating type air expansion power generation unit on the pressure, temperature and safe and stable supply of the lubricating oil.
Step 113, judging whether 1) the first high-temperature heat storage medium pump inlet isolation valve V28 and the second high-temperature heat storage medium pump inlet isolation valve V30 are opened to a first preset opening degree; 2) The first high temperature heat storage medium pump outlet isolation valve V29 and the second high temperature heat storage medium pump outlet isolation valve V31 are fully opened; 3) The high-temperature heat storage medium pump recirculation isolation valve V32 and the high-temperature heat storage medium pump recirculation regulating valve V33 are fully opened; 4) The first inter-stage reheater heat storage medium side inlet isolation valve V34, the second inter-stage reheater heat storage medium side inlet isolation valve V37, the third inter-stage reheater heat storage medium side inlet isolation valve V40, and the fourth inter-stage reheater heat storage medium side inlet isolation valve V43 have been fully opened; 5) The first inter-stage reheater heat storage medium side inlet trim valve V35, the second inter-stage reheater heat storage medium side inlet trim valve V38, the third inter-stage reheater heat storage medium side inlet trim valve V41, and the fourth inter-stage reheater heat storage medium side inlet trim valve V44 have been fully opened; 6) The first stage inter-stage reheater heat storage medium side outlet isolation valve V36, the second stage inter-stage reheater heat storage medium side outlet isolation valve V39, the third stage inter-stage reheater heat storage medium side outlet isolation valve V42 and the fourth stage inter-stage reheater heat storage medium side outlet isolation valve V45 are fully open. If any one of the above six conditions is not satisfied, or any plurality of conditions are not satisfied, step 114 is performed, an instruction to open the first high-temperature heat storage medium pump inlet isolation valve V28 and the second high-temperature heat storage medium pump inlet isolation valve V30 to a first preset opening degree is issued, an instruction to open the first high-temperature heat storage medium pump outlet isolation valve V29 and the second high-temperature heat storage medium pump outlet isolation valve V31 fully is issued, an instruction to open the high-temperature heat storage medium pump recirculation isolation valve V32 and the high-temperature heat storage medium pump recirculation modulation valve V33 fully is issued, an instruction to open the first reheater heat storage medium side inlet isolation valve V34, the second reheater heat storage medium side inlet isolation valve V37, the third reheater heat storage medium side inlet isolation valve V40 and the fourth reheater heat storage medium side inlet isolation valve V43 fully is issued, an instruction to open the first reheater heat storage medium side inlet modulation valve V35, the second reheater heat storage medium side reheater heat storage medium inlet modulation valve V38, the third reheater heat storage medium inlet modulation valve V41 and the fourth reheater heat storage medium side reheater heat storage medium outlet isolation valve V43 fully open the third reheater heat storage medium pump outlet isolation valve V44 fully is issued, and the fourth reheater heat storage medium pump outlet isolation valve V36 fully opens. If both of the above conditions are satisfied, step 115 is performed.
In an example of an application of the method, the first predetermined opening may be 5%, and the implementation may be determined according to the actual situation.
And step 115, judging whether the first preset time is delayed or not, or receiving an instruction of manually confirming the emptying and preheating of the heat storage medium subsystem to be finished. If the first predetermined time has expired or an instruction has been received to manually confirm that the heat storage medium subsystem is empty and warm up is complete, proceed to step 116.
In an example of an application of the method, the first predetermined time may be 10 minutes, which may be determined according to the actual implementation.
Step 116, judging whether 1) the first high temperature heat storage medium pump inlet isolation valve V28 and the second high temperature heat storage medium pump inlet isolation valve V30 are fully opened; 2) The first high temperature heat storage medium pump outlet isolation valve V29 and the second high temperature heat storage medium pump outlet isolation valve V31 are fully closed; 3) A first inter-stage reheater heat storage medium side inlet isolation valve V34, a second inter-stage reheater heat storage medium side inlet isolation valve V37, a third inter-stage reheater heat storage medium side inlet isolation valve V40, and a fourth inter-stage reheater heat storage medium side inlet isolation valve V43, and a first inter-stage reheater heat storage medium side inlet adjustment valve V35, a second inter-stage reheater heat storage medium side inlet adjustment valve V38, a third inter-stage reheater heat storage medium side inlet adjustment valve V41, and a fourth inter-stage reheater heat storage medium side inlet adjustment valve V44, and a first inter-stage reheater heat storage medium side outlet isolation valve V36, a second inter-stage reheater heat storage medium side outlet isolation valve V39, a third inter-stage reheater heat storage medium side outlet isolation valve V42, and a fourth inter-stage reheater heat storage medium side outlet isolation valve V45 are fully closed. If any one of the above three conditions is not satisfied, or any more than one of the above three conditions is not satisfied, step 117 is performed to issue an instruction to fully open the first high-temperature heat storage medium pump inlet isolation valve V28 and the second high-temperature heat storage medium pump inlet isolation valve V30, an instruction to fully close the first high-temperature heat storage medium pump outlet isolation valve V29 and the second high-temperature heat storage medium pump outlet isolation valve V31, an instruction to fully close the first stage inter-stage reheater heat storage medium side inlet isolation valve V34, the second stage inter-stage reheater heat storage medium side inlet isolation valve V37, the third stage inter-stage reheater heat storage medium side inlet isolation valve V40, and the fourth stage reheater heat storage medium side inlet isolation valve V43, an instruction to fully close the first stage heat storage medium side inlet adjustment valve V35, the second stage inter-stage reheater heat storage medium side inlet adjustment valve V38, the third stage inter-reheater heat storage medium side inlet adjustment valve V41, the fourth stage reheater heat storage medium side inlet adjustment valve V44, and a third stage reheater heat storage medium outlet isolation valve V45. If both of the above conditions are met, step 118 is performed.
The purpose of steps 113 to 117 is to conduct the high-temperature heat storage medium flow path to prepare for starting the high-temperature heat storage medium pump, perform evacuation and preheating operations on the flow path, and stop evacuation and preheating operations by evacuation and preheating for 10 minutes or manually judging that evacuation and preheating are completed.
Step 118, it is determined whether the first high temperature heat storage medium pump 30 or the second high temperature heat storage medium pump 31 has been started. If the first high temperature heat storage medium pump 30 and the second high temperature heat storage medium pump 31 are not started, step 119 is performed, and an instruction to start the first high temperature heat storage medium pump 30 or the second high temperature heat storage medium pump 31 is issued. If the first high temperature heat storage medium pump 30 or the second high temperature heat storage medium pump 31 has been started, step 120 is performed.
And step 120, judging whether the outlet isolation valve of the started high-temperature heat storage medium pump is fully opened. If the outlet isolation valve of the started high-temperature heat storage medium pump is not fully opened, step 121 is carried out, and a command of fully opening the outlet isolation valve of the started high-temperature heat storage medium pump is sent out. If the high temperature heat storage medium pump outlet isolation valve has been activated fully opened, step 122 is performed.
And step 122, judging whether the high-temperature heat storage medium pump which is not started is put into starting standby pump interlocking. If the high-temperature heat storage medium pump which is not started is not put into the starting backup pump interlock, step 123 is performed, and an instruction for putting the high-temperature heat storage medium pump which is not started into the starting backup pump interlock is sent out. If the un-activated high temperature heat storage medium pump has been placed into the activated backup pump interlock, step 124 is performed.
And step 124, judging whether the outlet isolation valve of the high-temperature heat storage medium pump which is not started is fully opened. If the high temperature heat storage medium pump outlet isolation valve is not fully opened, step 125 is performed to issue a command to fully open the high temperature heat storage medium pump outlet isolation valve. If the un-activated high temperature heat storage medium pump outlet isolation valve is fully open, step 126 is performed.
Step 126, judging whether 1) the high-temperature heat storage medium pump recirculation regulating valve V33 is used for automatically controlling the flow rate F5 of the heat storage medium at the outlet of the first-stage inter-stage reheater, the flow rate F6 of the heat storage medium at the outlet of the second-stage inter-stage reheater, the flow rate F7 of the heat storage medium at the outlet of the third-stage inter-stage reheater, the flow rate F8 of the heat storage medium at the outlet of the fourth-stage inter-stage reheater and the recirculation flow rate F9 of the high-temperature heat storage medium pump; 2) The high-temperature heat storage medium pump frequency converter is started, and the outlet pressure of the high-temperature heat storage medium pump on the outlet pipeline of the frequency converter is automatically controlled. If either of the two conditions is not met or both conditions are not met, step 127 is performed, an instruction that the high-temperature heat storage medium pump recirculation regulating valve V33 is started to automatically control the flow rate F5 of the heat storage medium at the outlet of the first-stage inter-stage reheater, the flow rate F6 of the heat storage medium at the outlet of the second-stage inter-stage reheater, the flow rate F7 of the heat storage medium at the outlet of the third-stage inter-stage reheater, the flow rate F8 of the heat storage medium at the outlet of the fourth-stage inter-stage reheater and the recirculation flow rate F9 of the high-temperature heat storage medium pump is sent, and an instruction that the high-temperature heat storage medium pump frequency converter is started to automatically control the pump outlet pressure of the high-temperature heat storage medium pump on the outlet pipeline is sent. If both of the above conditions are satisfied, step 128 is performed.
The purpose of steps 118-127 is to complete the high temperature heat storage medium pump start-up and put into relevant interlocking and automation, and to prepare for the safe operation of the subsequent heat storage medium subsystem and the input of heat energy to the interstage reheat type air expansion generator set.
Steps 128 to 152 are described according to 4 operating conditions:
(1) The first-stage operation condition is as follows:
step 128, judging whether 1) the isolating valve V64 of the sealed air outlet of the air expander in the first-stage air storage chamber is fully opened; 2) The first stage air expander sealing air inlet isolation valve V17 is fully opened; 3) The second stage air expander sealed air inlet isolation valve V18, the third stage air expander sealed air inlet isolation valve V19 and the fourth stage air expander sealed air inlet isolation valve V20 are fully closed; 4) The first clutch 7 has been placed in the unlocked state. If any one of the four conditions is not met or any multiple of the four conditions are not met, step 129 is performed, a command of fully opening the first-stage air storage chamber for the air expander sealed air outlet isolation valve V64 is issued, a command of fully opening the first-stage air expander sealed air inlet isolation valve V17 is issued, a command of fully closing the second-stage air expander sealed air inlet isolation valve V18, the third-stage air expander sealed air inlet isolation valve V19 and the fourth-stage air expander sealed air inlet isolation valve V20 is issued, and a command of unlocking the first clutch 7 is issued. If the above conditions are all satisfied, proceed to step 130.
Step 130, judging whether 1) the air supply pressure P17 of the sealing air of the first-stage air expander is normal; 2) The air supply pressure P22 of the isolated air of the first-stage air expander is normal; 3) The lubricating oil supply pressure P32 is normal and the lubricating oil filter differential pressure PD1 is not alarmed; 4) The first stage air expander first end bearing temperature T21 and the first stage air expander second end bearing temperature T22 are normal; 5) The generator first end bearing temperature T17 and the generator second end bearing temperature T18, and the gearbox reducer first end bearing temperature T19 and the gearbox reducer second end bearing temperature T20 are normal; 6) The first stage air expander first end bearing lube oil return temperature T36 and the first stage air expander second end bearing lube oil return temperature T37, and the first clutch lube oil return temperature T38 are normal; 7) The temperature T29 of the three-phase coil of the generator is normal; 8) The first end shaft vibration V01 of the generator and the second end shaft vibration V02 of the generator, the first end shaft vibration V03 of the reducer of the gearbox and the second end shaft vibration V04 of the reducer of the gearbox, and the first end shaft vibration V05 of the first stage air expander and the second end shaft vibration V06 of the first stage air expander are normal; 9) The first stage air expander shaft displacement Z1 and the first clutch shaft displacement Z2 are normal; 10 The first clutch shaft misalignment amount M1 is normal. If the above conditions are all satisfied, step 131 is performed.
And 131, judging whether the first-stage air expander inlet cutoff valve V2 and the first-stage air expander inlet adjusting valve V3 are completely closed. If the first stage air expander inlet shutoff valve V2 or the first stage air expander inlet adjustment valve V3 is not fully closed, then step 132 is performed to issue a command to fully close the first stage air expander inlet shutoff valve V2 and the first stage air expander inlet adjustment valve V3. If the first stage air expander inlet shutoff valve V2 and the first stage air expander inlet trim valve V3 are fully closed, step 133 is performed.
Step 133, determining whether 1) the outlet air pressure P2 (the pressure set value automatically changes along with the system load) of the first-stage inter-stage reheater is automatically controlled by the outlet regulating valve V1 of the first-stage air storage chamber; 2) The bypass regulating valve V4 of the first-stage air expander is opened to a second preset opening degree; 3) The first inter-stage reheater heat storage medium side inlet isolation valve V34 and the first inter-stage reheater heat storage medium side outlet isolation valve V36 have been fully opened; 4) The first stage inter-stage reheater heat storage medium side inlet trim valve V35 has been placed into automatic control of the first stage inter-stage reheater outlet air temperature T2. If any one of the four conditions is not satisfied, or if any more conditions are not satisfied, then step 134 is performed: and sending an instruction of automatically controlling the pressure P2 of the outlet air of the first-stage inter-stage reheater by the first-stage air storage chamber outlet adjusting valve V1, sending an instruction of opening the first-stage air expander bypass adjusting valve V4 to a second preset opening degree, sending an instruction of fully opening the first-stage inter-stage reheater heat-storage medium side inlet isolating valve V34 and the first-stage inter-stage reheater heat-storage medium side outlet isolating valve V36, and sending an instruction of automatically controlling the temperature T2 of the outlet air of the first-stage inter-stage reheater heat-storage medium side inlet adjusting valve V35 in the first-stage inter-stage reheater. If both of the above conditions are met, step 135 is performed.
In an example of an application of the method, the second predetermined opening may be 50%, and the implementation may be determined according to the actual situation.
Step 135, judging whether 1) the outlet isolation valve V60 of the first-stage air storage chamber is fully opened; 2) The inlet cut-off valve V2 of the first-stage air expander is fully opened; 3) The first stage inter-stage reheater outlet air pressure P2 and the first stage inter-stage reheater outlet air temperature T2 already satisfy the start-up intake air requirement of the first stage air expander 1. If any one of the three conditions is not met, or if any plurality of conditions are not met, then step 136 is performed: and sending an instruction of fully opening an outlet isolation valve V60 of the first-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve V2 of the first-stage air expander, and waiting for the outlet air pressure P2 of the first-stage interstage reheater and the outlet air temperature T2 of the first-stage interstage reheater to meet the starting air intake requirement of the first-stage air expander 1. If the above conditions are all satisfied, proceed to step 137.
In step 137, it is determined whether the first stage air expander bypass trim valve V4 is fully closed. If the first stage air expander bypass trim valve V4 is not fully closed, then a step 138 is performed to command full closing of the first stage air expander bypass trim valve V4. If the first stage air expander bypass trim valve V4 is fully closed, step 139 is performed.
Steps 128-138 are performed to meet the interstage reheat air expansion genset start-up conditions.
Step 139, judging whether 1) the inlet regulating valve V3 of the first-stage air expander is put into automatic control of the rotor speed S2 of the first-stage air expander; 2) The rotating speed S2 of the rotor of the first-stage air expander is increased to a first preset rotating speed according to a first preset acceleration rate; 3) The first clutch 7 is already in a disengaged state. If any one of the three conditions is not met or any plurality of conditions are not met, step 140 is performed to send an instruction that the first-stage air expander inlet regulating valve V3 is used for automatically controlling the first-stage air expander rotor rotating speed S2, and the first-stage air expander rotor rotating speed S2 is increased to a first preset rotating speed according to a first preset acceleration rate and the first clutch 7 is in a disengaged state. If both of the above conditions are satisfied, step 141 is performed.
In one example of the method, the first predetermined acceleration rate may be 33000rpm/min, and the first predetermined rotational speed may be 2000rpm, depending on the actual implementation.
The purpose of steps 139-140 is to allow the unit to quickly increase in speed at the initial stage of start-up to meet the mechanical safety requirements.
Step 141, determining whether the rotor speed S2 of the first stage air expander has increased to a second preset speed according to a second preset acceleration rate. If the first stage air expander rotor speed S2 has increased to a second predetermined speed at a second predetermined acceleration rate, step 142 is performed.
In one example of the method, the second predetermined acceleration rate may be 12000rpm/min, and the second predetermined rotational speed may be 20000rpm, depending on the actual implementation.
Step 142, judging whether 1) the second preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 143 is performed.
In an embodiment of the method, the second predetermined time may be 6 minutes, which may be determined according to the actual situation.
The purpose of steps 141-142 is to raise the speed of the unit to a warm-up value and complete the warm-up process.
And step 143, judging whether the rotating speed S2 of the rotor of the first-stage air expander is increased to a third preset rotating speed according to a third preset acceleration rate. If the first stage air expander rotor speed S2 has increased to the third predetermined speed at the third predetermined acceleration rate, step 144 is performed.
In one example of the method, the third predetermined acceleration rate may be 33000rpm/min, and the third predetermined rotational speed may be 30000rpm, depending on the actual implementation.
Step 144, determining whether 1) the third predetermined time has been delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 145 is performed.
In an embodiment of the method, the third predetermined time may be 6 minutes, which may be determined according to the actual situation.
The purpose of steps 143 to 144 is to allow the unit speed to quickly cross the critical zone.
And step 145, judging whether the rotating speed S2 of the rotor of the first-stage air expander is increased to a fourth preset rotating speed according to a fourth preset acceleration rate. If the first stage air expander rotor speed S2 has increased to the fourth preset speed at the fourth preset acceleration rate, step 146 is performed.
In an example of an application of the method, the fourth preset acceleration rate may be 6000rpm/min, and the fourth preset rotation speed may be 35000rpm, which may be determined according to actual conditions.
Step 146, determining whether 1) the fourth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 147 is performed.
In an example of an application of the method, the fourth predetermined time may be 15 minutes, which may be determined according to the actual implementation.
The purpose of steps 145-146 is to bring the unit speed up to the rated value to complete the unit speed-up process.
Step 147, judging whether 1) the generator 6 is connected to the grid; 2) The inlet regulating valve V3 of the first stage air expander is put into the unit for automatic load control. If either or both of the above conditions are not satisfied, step 148 is performed to issue a command for grid connection of the generator 6 and a command for putting the first-stage air expander inlet control valve V3 into unit load automatic control. If both of the above conditions are satisfied, step 149 is performed.
And 149, judging whether the unit load is increased to a first preset load proportion. If the unit load has increased to the first predetermined load ratio, proceed to step 150.
In an example of an application of the method, the first predetermined load ratio may be 15%, and the implementation may be determined according to actual conditions.
Step 150, judging whether 1) the fifth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If the above conditions are all satisfied, proceed to step 151.
In an example of an application of the method, the fifth predetermined time may be 30 minutes, which may be determined according to the actual implementation.
And 151, judging whether the load of the unit is increased to a second preset load proportion. If the unit load has increased to the second predetermined load ratio, go to step 152.
In an example of an application of the method, the second predetermined load ratio may be 100%, and the specific implementation may be determined according to the actual situation.
Step 152, judging whether 1) the sixth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If the above conditions are all satisfied, the entire startup sequence of the expansion power generation system is ended.
In an embodiment of the method, the sixth predetermined time may be 60 minutes, which may be determined according to the actual implementation.
The purpose of steps 147-152 is to continue increasing the unit to the rated load after grid connection and warming up with the initial load, thereby finishing the whole starting step of the expansion power generation system.
(2) The second-stage operation condition is as follows:
step 128, judging whether 1) the isolating valve V65 of the sealed air outlet of the air expander in the second-stage air storage chamber is fully opened; 2) The first stage air expander sealing air inlet isolation valve V17 and the second stage air expander sealing air inlet isolation valve V18 are fully opened; 3) The third stage air expander sealing air inlet isolation valve V19 and the fourth stage air expander sealing air inlet isolation valve V20 are fully closed; 4) The first clutch 7 has been placed in the locked state; 5) The second clutch 8 has been placed in the unlocked state. If any one of the above five conditions is not satisfied, or any multiple of the above five conditions are not satisfied, then step 129 is performed, an instruction to fully open the second-stage air reservoir air expander seal air outlet isolation valve V65, an instruction to fully open the first-stage air expander seal air inlet isolation valve V17 and the second-stage air expander seal air inlet isolation valve V18, an instruction to fully close the third-stage air expander seal air inlet isolation valve V19 and the fourth-stage air expander seal air inlet isolation valve V20, an instruction to lock the first clutch 7, and an instruction to unlock the second clutch 8 are issued. If the above conditions are all satisfied, proceed to step 130.
Step 130, judging whether 1) the air supply pressure P17 of the sealing wind of the first-stage air expander and the air supply pressure P18 of the sealing wind of the second-stage air expander are normal; 2) The air supply pressure P22 of the isolation air of the first-stage air expansion machine and the air supply pressure P23 of the isolation air of the second-stage air expansion machine are normal; 3) The lubricating oil supply pressure P32 is normal and the lubricating oil filter differential pressure PD1 is not alarmed; 4) The generator first end bearing temperature T17 and the generator second end bearing temperature T18, and the gearbox reducer first end bearing temperature T19 and the gearbox reducer second end bearing temperature T20 are normal; 5) The first stage air expander first end bearing temperature T21 and the first stage air expander second end bearing temperature T22, and the second stage air expander first end bearing temperature T23 and the second stage air expander second end bearing temperature T24 are normal; 6) The temperature T29 of the three-phase coil of the generator is normal; 7) The first stage air expander first end bearing lube oil return temperature T36 and first stage air expander second end bearing lube oil return temperature T37, and the second stage air expander first end bearing lube oil return temperature T39 and second stage air expander second end bearing lube oil return temperature T40, and first clutch lube oil return temperature T38, and second clutch lube oil return temperature T41 are normal; 8) The first end shaft vibration V01 of the generator and the second end shaft vibration V02 of the generator, the first end shaft vibration V03 of the speed reducer of the gear box and the second end shaft vibration V04 of the speed reducer of the gear box, the first end shaft vibration V05 of the first stage air expander and the second end shaft vibration V06 of the first stage air expander, and the first end shaft vibration V07 of the second stage air expander and the second end shaft vibration V08 of the second stage air expander are normal; 9) The first stage air expander shaft displacement Z1 and the second stage air expander shaft displacement Z3, and the first clutch shaft displacement Z2, the second clutch shaft displacement Z4 are normal; 10 The first clutch shaft misalignment amount M1 and the second clutch shaft misalignment amount M2 are already normal. If the above conditions are all satisfied, step 131 is performed.
Step 131, judging whether 1) an inlet cutoff valve V2 and an inlet adjusting valve V3 of the first-stage air expander are fully opened; 2) The inlet cut-off valve V6 and the inlet adjusting valve V7 of the second-stage air expander are completely closed; 3) The first stage air expander bypass trim valve V4 is fully closed. If any one of the three conditions is not met or if any plurality of conditions are not met, step 132 is performed to issue a command to fully open the first stage air expander inlet shutoff valve V2 and the first stage air expander inlet adjustment valve V3, to fully close the second stage air expander inlet shutoff valve V6 and the second stage air expander inlet adjustment valve V7, and to fully close the first stage air expander bypass adjustment valve V4. If the above conditions are all satisfied, step 133 is performed.
Step 133, judging whether 1) the outlet air pressure P6 (the pressure set value automatically changes along with the unit load) of the second-stage reheater into which the outlet air regulating valve V5 of the second-stage air storage chamber is put is automatically controlled; 2) The bypass regulating valve V8 of the second-stage air expander is opened to a second preset opening degree; 3) The first-stage inter-stage reheater heat storage medium side inlet isolation valve V34 and the first-stage inter-stage reheater heat storage medium side outlet isolation valve V36, and the second-stage inter-stage reheater heat storage medium side inlet isolation valve V37 and the second-stage inter-stage reheater heat storage medium side outlet isolation valve V39 are fully opened; 4) The first-stage inter-stage reheater heat storage medium side inlet adjusting valve V35 and the second-stage inter-stage reheater heat storage medium side inlet adjusting valve V38 are respectively and automatically controlled to be in the first-stage inter-stage reheater outlet air temperature T2 and the second-stage inter-stage reheater outlet air temperature T6. If any one of the four conditions is not satisfied, or any multiple of the four conditions are not satisfied, step 134 is performed, a command for automatically controlling the input of the second-stage air storage chamber outlet damper V5 to the second-stage inter-stage reheater outlet air pressure P6 is issued, a command for opening the second-stage air expander bypass damper V8 to a second preset opening degree is issued, a command for fully opening the first-stage inter-stage reheater heat-storage medium side inlet isolation valve V34 and the first-stage inter-stage reheater heat-storage medium side outlet isolation valve V36 is issued, a command for fully opening the second-stage inter-stage reheater heat-storage medium side inlet isolation valve V37 and the second-stage inter-reheater heat-storage medium side outlet isolation valve V39 is issued, and a command for automatically controlling the input of the first-stage reheater heat-storage medium side inlet damper V35 and the second-stage reheater heat-storage medium side inlet damper V38 to the first-stage reheater outlet air temperature T2 and the second-stage inter-stage reheater outlet air temperature T6, respectively, is issued. If both of the above conditions are satisfied, step 135 is performed.
In an example of an application of the method, the second predetermined opening may be 50%, and the implementation may be determined according to the actual situation.
Step 135, judging whether 1) the second-stage air storage chamber outlet isolation valve V61 is fully opened; 2) The inlet cut-off valve V6 of the second-stage air expander is fully opened; 3) The second stage inter-stage reheater outlet air pressure P6 and the second stage inter-stage reheater outlet air temperature T6 already satisfy the start-up intake requirement of the second stage air expander 2. If any one of the three conditions is not met or any multiple conditions are not met, step 136 is performed, a command of fully opening the second-stage air storage chamber outlet isolation valve V61 is issued, a command of fully opening the second-stage air expander inlet shutoff valve V6 is issued, and the conditions that the second-stage inter-stage reheater outlet air pressure P6 and the second-stage inter-stage reheater outlet air temperature T6 meet the starting air intake requirement of the second-stage air expander 2 are waited to be met. If the above conditions are all satisfied, proceed to step 137.
And 137, judging whether the bypass adjusting valve V8 of the second-stage air expansion machine is completely closed. If the second stage air expander bypass trim valve V8 is not fully closed, then step 138 is performed to command full closing of the second stage air expander bypass trim valve V8. If the second stage air expander bypass trim valve V8 is fully closed, step 139 is performed.
Steps 128-138 are performed to meet the inter-stage reheat air expansion generator set start-up conditions.
Step 139, judging whether 1) an inlet regulating valve V7 of the second-stage air expander is put into automatic control of the rotor rotating speed S3 of the second-stage air expander; 2) The rotor speed S2 of the first-stage air expander and the rotor speed S3 of the second-stage air expander are increased to a first preset speed according to a first preset acceleration rate; 3) The first clutch 7 is already engaged and the second clutch 8 is already disengaged. If any one of the three conditions is not met or any plurality of conditions are not met, step 140 is performed, wherein a command of fully opening the inlet regulating valve V3 of the first-stage air expander is sent, a command of automatically controlling the rotor rotating speed S3 of the second-stage air expander is sent out by the inlet regulating valve V7 of the second-stage air expander, and the rotating speed S2 of the rotor of the first-stage air expander and the rotating speed S3 of the rotor of the second-stage air expander are increased to a first preset rotating speed according to a first preset acceleration rate, the first clutch 7 is in an engaged state, and the second clutch 8 is in a disengaged state. If both of the above conditions are satisfied, step 141 is performed.
In one example of the method, the first predetermined acceleration rate may be 33000rpm/min, and the first predetermined rotation speed may be 2000rpm, which may be determined according to practical situations.
The purpose of steps 139-140 is to enable the unit to be started quickly to meet the safety requirements.
Step 141, determining whether the rotor speed S2 of the first stage air expander and the rotor speed S3 of the second stage air expander have increased to a second preset speed according to a second preset acceleration rate. If the first stage air expander rotor speed S2 and the second stage air expander rotor speed S3 have increased to a second predetermined speed at a second predetermined acceleration rate, proceed to step 142.
In one example of the method, the second predetermined acceleration rate may be 12000rpm/min, and the second predetermined rotational speed may be 20000rpm, depending on the actual implementation.
Step 142, judging whether 1) the second preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 143 is performed.
In an example of an application of the method, the second predetermined time may be 6 minutes, which may be determined according to the actual implementation.
The purpose of steps 141-142 is to raise the speed of the unit to a warm-up value and complete the warm-up process.
And step 143, judging whether the rotor speed S2 of the first-stage air expander and the rotor speed S3 of the second-stage air expander are increased to a third preset speed according to a third preset acceleration rate. If the first stage air expander rotor speed S2 and the second stage air expander rotor speed S3 have increased to a third predetermined speed at a third predetermined acceleration rate, step 144 is performed.
In one example of the method, the third predetermined acceleration rate may be 33000rpm/min, and the third predetermined rotational speed may be 30000rpm, depending on the actual implementation.
Step 144, determining whether 1) the third predetermined time has been delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 145 is performed.
In an example of an application of the method, the third predetermined time may be 6 minutes, which may be determined according to the actual implementation.
The purpose of steps 143-144 is to allow the unit speed to quickly cross the critical zone.
Step 145, determining whether the rotor speed S2 of the first stage air expander and the rotor speed S3 of the second stage air expander have increased to a fourth preset speed according to a fourth preset acceleration rate. If the first stage air expander rotor speed S2 and the second stage air expander rotor speed S3 have increased to a fourth predetermined speed at a fourth predetermined acceleration rate, step 146 is performed.
In an example of an application of the method, the fourth preset acceleration rate may be 6000rpm/min, and the fourth preset rotation speed may be 35000rpm, which may be determined according to actual conditions.
Step 146, determining whether 1) the fourth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 147 is performed.
In an example of an application of the method, the fourth predetermined time may be 15 minutes, which may be determined according to the actual implementation.
The purpose of steps 145-146 is to bring the unit speed up to a rated value to complete the unit up-speed process.
Step 147, judging whether 1) the generator 6 is connected to the grid; 2) The inlet regulating valve V7 of the second-stage air expander is put into the unit for automatic load control. If either of the two conditions is not met or both conditions are not met, then step 148 is performed to send a command for grid connection of the generator 6 and a command for automatic control of the unit load by the second stage air expander inlet regulating valve V7. If both of the above conditions are satisfied, step 149 is performed.
Step 149, determine whether the load of the unit has increased to the first predetermined load ratio. If the unit load has risen to the first predetermined load proportion, proceed to step 150.
In an example of an application of the method, the first predetermined load ratio may be 15%, and the implementation may be determined according to actual conditions.
Step 150, judging whether 1) the fifth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, proceed to step 151.
In an example of an application of the method, the fifth predetermined time may be 30 minutes, which may be determined according to the actual implementation.
And 151, judging whether the load of the unit is increased to a second preset load proportion. If the unit load has increased to the second predetermined load ratio, go to step 152.
In an embodiment of the method, the second predetermined load ratio may be 100%, which may be determined according to actual conditions.
Step 152, judging whether 1) the sixth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If the above conditions are all satisfied, the entire startup sequence of the expansion power generation system is ended.
In an embodiment of the method, the sixth predetermined time may be 60 minutes, which may be determined according to the actual implementation.
The purpose of steps 147-152 is to continue increasing the unit to the rated load after grid connection and warming up with the initial load, thereby finishing the whole starting step of the expansion power generation system.
(3) Third-stage operation condition:
step 128, judging whether 1) the third-stage air storage chamber is provided with a sealed air outlet isolation valve V66 of the air expansion machine which is fully opened; 2) The first stage air expander sealed air inlet isolation valve V17, the second stage air expander sealed air inlet isolation valve V18 and the third stage air expander sealed air inlet isolation valve V19 are fully opened; 3) The fourth stage air expander sealing air inlet isolation valve V20 is fully closed; 4) The first clutch 7 and the second clutch 8 have been placed in the locked state; 5) The third clutch 9 has been placed in the unlocked state. If any one of the above five conditions is not satisfied, or any multiple of the above five conditions are not satisfied, then step 129 is performed, a command for fully opening the third-stage air storage chamber air expander sealing air outlet isolation valve V66 is issued, a command for fully opening the first-stage air expander sealing air inlet isolation valve V17, the second-stage air expander sealing air inlet isolation valve V18 and the third-stage air expander sealing air inlet isolation valve V19 is issued, a command for fully closing the fourth-stage air expander sealing air inlet isolation valve V20 is issued, a command for locking the first clutch 7 and the second clutch 8 is issued, and a command for unlocking the third clutch 9 is issued. If both of the above conditions are satisfied, step 130 is performed.
Step 130, judging whether 1) the air supply pressure P17 of the sealing air of the first-stage air expander, the air supply pressure P18 of the sealing air of the second-stage air expander and the air supply pressure P19 of the sealing air of the third-stage air expander are normal; 2) The air supply pressure P22 of the isolation air of the first-stage air expander, the air supply pressure P23 of the isolation air of the second-stage air expander and the air supply pressure P24 of the isolation air of the third-stage air expander are normal; 3) The lubricating oil supply pressure P32 is normal and the lubricating oil filter differential pressure PD1 is not alarmed; 4) The generator first end bearing temperature T17 and the generator second end bearing temperature T18, and the gearbox reducer first end bearing temperature T19 and the gearbox reducer second end bearing temperature T20 are normal; 5) The first stage air expander first end bearing temperature T21 and first stage air expander second end bearing temperature T22, and the second stage air expander first end bearing temperature T23 and second stage air expander second end bearing temperature T24, and the third stage air expander first end bearing temperature T25 and third stage air expander second end bearing temperature T26 are normal; 6) The temperature T29 of the three-phase coil of the generator is normal; 7) A first stage air expander first end bearing lube oil return temperature T36 and a first stage air expander second end bearing lube oil return temperature T37, and a second stage air expander first end bearing lube oil return temperature T39 and a second stage air expander second end bearing lube oil return temperature T40, and a third stage air expander first end bearing lube oil return temperature T42 and a third stage air expander second end bearing lube oil return temperature T43, and a first clutch lube oil return temperature T38, and a second clutch lube oil return temperature T41, and a third clutch lube oil return temperature T44 are normal; 8) A generator first end shaft vibration V01 and a generator second end shaft vibration V02, a gearbox reducer first end shaft vibration V03 and a gearbox reducer second end shaft vibration V04, a first stage air expander first end shaft vibration V05 and a first stage air expander second end shaft vibration V06, a second stage air expander first end shaft vibration V07 and a second stage air expander second end shaft vibration V08, a third stage air expander first end shaft vibration V09 and a third stage air expander second end shaft vibration V010 have been normal; 9) The first stage air expander shaft displacement Z1, the second stage air expander shaft displacement Z3, and the third stage air expander shaft displacement Z5, and the first clutch shaft displacement Z2, the second clutch shaft displacement Z4, and the third clutch shaft displacement Z6 are normal; 10 The first clutch shaft misalignment amount M1, the second clutch shaft misalignment amount M2, and the third clutch shaft misalignment amount M3 are already normal. If the above conditions are all satisfied, step 131 is performed.
Step 131, judging whether 1) the first stage air expander inlet cut-off valve V2 and the second stage air expander inlet cut-off valve V6, and the first stage air expander inlet regulating valve V3 and the second stage air expander inlet regulating valve V7 are fully opened; 2) The third-stage air expander inlet shut-off valve V10 and the third-stage air expander inlet adjusting valve V11 are completely closed; 3) The first stage air expander bypass trim valve V4 and the second stage air expander bypass trim valve V8 are fully closed. If any one of the three conditions is not satisfied, or if any of the three conditions are not satisfied, then step 132 is performed, wherein an instruction to fully open the first-stage air expander inlet cutoff valve V2 and the second-stage air expander inlet cutoff valve V6 is issued, an instruction to fully open the first-stage air expander inlet adjustment valve V3 and the second-stage air expander inlet adjustment valve V7 is issued, an instruction to fully close the third-stage air expander inlet cutoff valve V10 and the third-stage air expander inlet adjustment valve V11 is issued, and an instruction to fully close the first-stage air expander bypass adjustment valve V4 and the second-stage air expander bypass adjustment valve V8 is issued. If the above conditions are all satisfied, step 133 is performed.
Step 133, judging whether 1) the outlet air pressure P10 (the pressure set value automatically changes along with the load of the unit) of the reheater between the third-stage and the second-stage air storage chamber is automatically controlled by the outlet regulating valve V9 of the third-stage air storage chamber; 2) The bypass adjusting valve V12 of the third-stage air expander is opened to a second preset opening degree; 3) The first inter-stage reheater heat storage medium side inlet isolation valve V34 and the first inter-stage reheater heat storage medium side outlet isolation valve V36, and the second inter-stage reheater heat storage medium side inlet isolation valve V37 and the second inter-stage reheater heat storage medium side outlet isolation valve V39, and the third inter-stage reheater heat storage medium side inlet isolation valve V40 and the third inter-stage reheater heat storage medium side outlet isolation valve V42 have been fully opened; 4) The first, second and third inter-stage reheater heat storage medium side inlet trim valves V35, V38, and V41 have been automatically controlled to a first, second and third inter-stage reheater outlet air temperature T2, T6, and T10, respectively. If any one of the four conditions is not satisfied, or any multiple of the four conditions are not satisfied, step 134 is performed, a command for automatically controlling the input of the third-stage air storage chamber outlet damper V9 to the third-stage inter-stage reheater outlet air pressure P10 is issued, a command for opening the third-stage air expander bypass damper V12 to a second preset opening degree is issued, a command for fully opening the first-stage inter-stage reheater heat-storage medium side inlet isolation valve V34 and the first-stage inter-stage reheater heat-storage medium side outlet isolation valve V36 is issued, a command for fully opening the second-stage inter-stage reheater heat-storage medium side inlet isolation valve V37 and the second-stage inter-reheater heat-storage medium side outlet isolation valve V39 is issued, a command for fully opening the third-stage inter-stage reheater heat-storage medium side inlet isolation valve V40 and the third-stage inter-stage reheater heat-storage medium side outlet isolation valve V42 is issued, and a command for fully opening the first-stage inter-stage reheater heat-storage medium side inlet damper V35, the second-stage reheater heat-storage medium side inlet isolation valve V38, the third-stage reheater heat-storage medium side inlet isolation valve V41, and the third-stage reheater heat-storage medium side inlet damper V41 are respectively issued, and a third-stage reheater outlet air temperature T2, T6, and a third-stage reheater outlet air outlet temperature T6 are issued. If both of the above conditions are satisfied, step 135 is performed.
In an example of an application of the method, the second predetermined opening may be 50%, and the implementation may be determined according to the actual situation.
Step 135, judging whether 1) the outlet isolation valve V62 of the third-stage air storage chamber is fully opened; 2) The third-stage air expander inlet shut-off valve V10 is fully opened; 3) The third stage inter-stage reheater outlet air pressure P10 and the third stage inter-stage reheater outlet air temperature T10 have satisfied the third stage air expander 3 start-up intake air requirement. If any one of the three conditions is not met or any multiple conditions are not met, step 136 is performed, a command of fully opening the third-stage air storage chamber outlet isolation valve V62 is sent, a command of fully opening the third-stage air expander inlet shut-off valve V10 is sent, and the conditions that the third-stage interstage reheater outlet air pressure P10 and the third-stage interstage reheater outlet air temperature T10 meet the starting air intake requirement of the third-stage air expander 3 are waited. If the above conditions are all satisfied, proceed to step 137.
And 137, judging whether the third-stage air expander bypass adjusting valve V12 is completely closed. If the third stage air expander bypass damper V12 is not fully closed, a step 138 is provided for commanding full closing of the third stage air expander bypass damper V12. If the third stage air expander bypass trim valve V12 is fully closed, step 139 is performed.
Steps 128-138 are performed to meet the inter-stage reheat air expansion generator set start-up conditions.
Step 139, judging whether 1) an inlet regulating valve V11 of the third-stage air expander is put into automatic control of the rotor speed S4 of the third-stage air expander; 2) The rotor speed S2 of the first-stage air expander, the rotor speed S3 of the second-stage air expander and the rotor speed S4 of the third-stage air expander are increased to a first preset speed according to a first preset acceleration rate; 3) The first clutch 7 and the second clutch 8 have been engaged, and the third clutch 9 has been disengaged. If any one of the three conditions is not satisfied, or any more than one of the three conditions are not satisfied, step 140 is performed, an instruction is issued to automatically control the third stage air expander rotor rotation speed by the third stage air expander inlet adjustment valve V11, and the first stage air expander rotor rotation speed S2, the second stage air expander rotor rotation speed S3 and the third stage air expander rotor rotation speed S4 are waited to be increased to the first preset rotation speed according to the first preset acceleration rate, and the first clutch 7 and the second clutch 8 are in an engaged state, and the third clutch 9 is in a disengaged state. If both of the above conditions are satisfied, step 141 is performed.
In one example of the method, the first predetermined acceleration rate may be 33000rpm/min, and the first predetermined rotational speed may be 2000rpm, depending on the actual implementation.
The purpose of steps 139-140 is to enable the unit to start quickly to meet the safety requirements.
Step 141, determining whether the rotor speed S2 of the first stage air expander, the rotor speed S3 of the second stage air expander, and the rotor speed S4 of the third stage air expander have increased to a second preset speed according to a second preset acceleration rate. If the first stage air expander rotor speed S2, the second stage air expander rotor speed S3 and the third stage air expander rotor speed S4 have increased to a second predetermined speed according to a second predetermined acceleration rate, proceed to step 142.
In one example of the method, the second predetermined acceleration rate may be 12000rpm/min, and the second predetermined rotational speed may be 20000rpm, depending on the actual implementation.
Step 142, judging whether 1) the second preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 143 is performed.
In an example of an application of the method, the second predetermined time may be 6 minutes, which may be determined according to the actual implementation.
The purpose of steps 141-142 is to raise the speed of the unit to a warm-up value and complete the warm-up process.
And step 143, judging whether the rotor rotating speed S2 of the first-stage air expander, the rotor rotating speed S3 of the second-stage air expander and the rotor rotating speed S4 of the third-stage air expander are increased to a third preset rotating speed according to a third preset acceleration rate. If the first stage air expander rotor speed S2, the second stage air expander rotor speed S3 and the third stage air expander rotor speed S4 have increased to a third predetermined speed at a third predetermined acceleration rate, proceed to step 144.
In one example of the method, the third predetermined acceleration rate may be 33000rpm/min, and the third predetermined rotational speed may be 30000rpm, depending on the actual implementation.
Step 144, determining whether 1) the third predetermined time has been delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 145 is performed.
In an example of an application of the method, the third predetermined time may be 6 minutes, which may be determined according to the actual implementation.
The purpose of steps 143-144 is to allow the unit speed to quickly cross the critical zone.
And step 145, judging whether the rotor speed S2 of the first-stage air expander, the rotor speed S3 of the second-stage air expander and the rotor speed S4 of the third-stage air expander are increased to a fourth preset speed according to a fourth preset acceleration rate. If the first stage air expander rotor speed S2, the second stage air expander rotor speed S3, and the third stage air expander rotor speed S4 have increased to a fourth predetermined speed according to a fourth predetermined acceleration rate, proceed to step 146.
In an example of an application of the method, the fourth preset acceleration rate may be 6000rpm/min, and the fourth preset rotation speed may be 35000rpm, which may be determined according to actual conditions.
Step 146, determining whether 1) the fourth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 147 is performed.
In an embodiment of the method, the fourth predetermined time may be 15 minutes, which may be determined according to the actual situation.
The purpose of steps 145-146 is to bring the unit speed up to the rated value to complete the unit speed-up process.
Step 147, judging whether 1) the generator 6 is connected to the grid; 2) The inlet adjusting valve V11 of the third-stage air expander is put into automatic control of unit load. If either of the two conditions is not met or both of the two conditions are not met, the step 148 is carried out, a command of grid connection of the generator 6 is sent out, and a command of putting the third-stage air expander inlet regulating valve V11 into the unit load automatic control is sent out. If both of the above conditions are satisfied, step 149 is performed.
Step 149, determine whether the load of the unit has increased to the first predetermined load ratio. If the unit load has increased to the first predetermined load ratio, proceed to step 150.
In an embodiment of the method, the first predetermined load ratio may be 15%, which may be determined according to the actual situation.
Step 150, determining whether 1) the fifth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If the above conditions are all satisfied, proceed to step 151.
In an embodiment of the method, the fifth predetermined time may be 30 minutes, which may be determined according to the actual situation.
And 151, judging whether the load of the unit is increased to a second preset load proportion. If the unit load has increased to the second predetermined load ratio, go to step 152.
In an embodiment of the method, the second predetermined load ratio may be 100%, which may be determined according to actual conditions.
Step 152, judging whether 1) the sixth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If the above conditions are all satisfied, the entire startup sequence of the expansion power generation system is ended.
In an example of an application of the method, the sixth predetermined time may be 60 minutes, which may be determined according to the actual implementation.
The purpose of steps 147-152 is to continue increasing the unit to the rated load after grid connection and warming up with the initial load, thereby finishing the whole starting step of the expansion power generation system.
(4) Fourth-stage operating condition:
step 128, judging whether 1) the fourth-stage air storage chamber is provided with a sealed air outlet isolation valve V67 of the air expansion machine which is fully opened; 2) The first stage air expander sealed air inlet isolation valve V17, the second stage air expander sealed air inlet isolation valve V18, the third stage air expander sealed air inlet isolation valve V19 and the fourth stage air expander sealed air inlet isolation valve V20 are fully opened; 3) The first clutch 7, the second clutch 8 and the third clutch 9 have been placed in the locked state. If any one of the three conditions is not satisfied, or any more conditions are not satisfied, step 129 is performed, a command for fully opening the fourth-stage air storage chamber for the air expander sealed air outlet isolation valve V67 is issued, a command for fully opening the first-stage air expander sealed air inlet isolation valve V17, the second-stage air expander sealed air inlet isolation valve V18, the third-stage air expander sealed air inlet isolation valve V19 and the fourth-stage air expander sealed air inlet isolation valve V20 is issued, and a command for locking the first clutch 7, the second clutch 8 and the third clutch 9 is issued. If both of the above conditions are satisfied, step 130 is performed.
Step 130, judging whether 1) the air supply pressure P17 of the sealing air of the first-stage air expander, the air supply pressure P18 of the sealing air of the second-stage air expander, the air supply pressure P19 of the sealing air of the third-stage air expander and the air supply pressure P20 of the sealing air of the fourth-stage air expander are normal; 2) The first stage air expander isolation air supply pressure P22, the second stage air expander isolation air supply pressure P23, the third stage air expander isolation air supply pressure P24 and the fourth stage air expander isolation air supply pressure P25 are normal; 3) The lubricating oil supply pressure P32 is normal and the lubricating oil filter differential pressure PD1 is not alarmed; 4) The generator first end bearing temperature T17 and the generator second end bearing temperature T18, and the gearbox reducer first end bearing temperature T19 and the gearbox reducer second end bearing temperature T20 are normal; 5) The first stage air expander first end bearing temperature T21 and first stage air expander second end bearing temperature T22, and the second stage air expander first end bearing temperature T23 and second stage air expander second end bearing temperature T24, and the third stage air expander first end bearing temperature T25 and third stage air expander second end bearing temperature T26, and the fourth stage air expander first end bearing temperature T27 and fourth stage air expander second end bearing temperature T28 are normal; 6) The temperature T29 of the three-phase coil of the generator is normal; 7) A first stage air expander first end bearing lube oil return temperature T36 and a first stage air expander second end bearing lube oil return temperature T37, and a second stage air expander first end bearing lube oil return temperature T39 and a second stage air expander second end bearing lube oil return temperature T40, and a third stage air expander first end bearing lube oil return temperature T42 and a third stage air expander second end bearing lube oil return temperature T43, and a fourth stage air expander first end bearing lube oil return temperature T45 and a fourth stage air expander second end bearing lube oil return temperature T46, and a first clutch lube oil return temperature T38, and a second clutch lube oil return temperature T41, and a third clutch lube oil return temperature T44 are normal; 8) A first end shaft vibration V01 of the generator and a second end shaft vibration V02 of the generator, a first end shaft vibration V03 of the gearbox reducer and a second end shaft vibration V04 of the gearbox reducer, a first end shaft vibration V05 of the first-stage air expander and a second end shaft vibration V06 of the first-stage air expander, a first end shaft vibration V07 of the second-stage air expander and a second end shaft vibration V08 of the second-stage air expander, a first end shaft vibration V09 of the third-stage air expander and a second end shaft vibration V010 of the third-stage air expander, and a first end shaft vibration V011 of the fourth-stage air expander and a second end shaft vibration V012 of the fourth-stage air expander are normal; 9) First stage Z1, second stage Z3, third stage Z5 and fourth stage Z7 air expander shaft displacements, and first Z2, second Z4 and third Z6 clutch shaft displacements are normal; 10 The first clutch shaft misalignment amount M1, the second clutch shaft misalignment amount M2, and the third clutch shaft misalignment amount M3 are normal. If the above conditions are all satisfied, step 131 is performed.
Step 131, judging whether 1) the first stage air expander inlet cut-off valve V2, the second stage air expander inlet cut-off valve V6 and the third stage air expander inlet cut-off valve V10, and the first stage air expander inlet regulating valve V3, the second stage air expander inlet regulating valve V7 and the third stage air expander inlet regulating valve V11 are fully opened; 2) The fourth stage air expander inlet shut-off valve V14 and the fourth stage air expander inlet regulating valve V15 are completely closed; 3) The first stage air expander bypass damper V4, the second stage air expander bypass damper V8, and the third stage air expander bypass damper V12 are fully closed. If any one of the three conditions is not satisfied, or if any more than one of the three conditions is not satisfied, step 132 is performed to issue instructions to fully open the first stage air expander inlet cut-off valve V2, the second stage air expander inlet cut-off valve V6, and the third stage air expander inlet cut-off valve V10, to fully open the first stage air expander inlet adjustment valve V3, the second stage air expander inlet adjustment valve V7, and the third stage air expander inlet adjustment valve V11, to fully close the fourth stage air expander inlet cut-off valve V14, the fourth stage air expander inlet adjustment valve V15, and to fully close the first stage air expander bypass adjustment valve V4, the second stage air expander bypass adjustment valve V8, and the third stage air expander bypass adjustment valve V12. If the above conditions are all satisfied, step 133 is performed.
Step 133, judging whether 1) the outlet air pressure P14 (the pressure set value automatically changes along with the unit load) of the reheater between the fourth stage and the fourth stage is automatically controlled by the outlet air regulating valve V13 of the fourth stage air storage chamber; 2) The fourth-stage air expander bypass regulating valve V16 is opened to a second preset opening degree; 3) A first-stage inter-stage reheater heat-storage medium side inlet isolation valve V34 and a first-stage inter-stage reheater heat-storage medium side outlet isolation valve V36, a second-stage inter-stage reheater heat-storage medium side inlet isolation valve V37 and a second-stage reheater heat-storage medium side outlet isolation valve V39, a third-stage inter-stage reheater heat-storage medium side inlet isolation valve V40 and a third-stage inter-stage reheater heat-storage medium side outlet isolation valve V42, a fourth-stage inter-stage reheater heat-storage medium side inlet isolation valve V43 and a fourth-stage inter-stage reheater heat-storage medium side outlet isolation valve V45 are fully opened; 4) The first-stage inter-stage reheater heat-storage medium side inlet adjusting valve V35, the second-stage inter-stage reheater heat-storage medium side inlet adjusting valve V38, the third-stage inter-stage reheater heat-storage medium side inlet adjusting valve V41 and the fourth-stage inter-stage reheater heat-storage medium side inlet adjusting valve V44 are respectively subjected to automatic control over a first-stage inter-stage reheater outlet air temperature T2, a second-stage inter-stage reheater outlet air temperature T6, a third-stage inter-stage reheater outlet air temperature T10 and a fourth-stage inter-stage reheater outlet air temperature T14. If any one of the four conditions is not satisfied, or any plurality of conditions are not satisfied, then step 134 is performed, a command is issued to automatically control the fourth-stage air storage chamber outlet damper V13 to put in the fourth-stage inter-stage reheater outlet air pressure P14, a command is issued to open the fourth-stage air expander bypass damper V16 to a second preset opening degree, a command is issued to fully open the first-stage inter-stage reheater heat-storage medium side inlet isolation valve V34 and the first-stage inter-stage reheater heat-storage medium side outlet isolation valve V36, a command is issued to fully open the second-stage inter-stage reheater heat-storage medium side inlet isolation valve V37 and the second-stage inter-stage reheater heat-storage medium side outlet isolation valve V39, and a command is issued to fully open the third-stage inter-stage reheater heat-storage medium side inlet isolation valve V40 and the third-stage inter-stage reheater heat-storage medium side outlet isolation valve V42, and sending out an instruction of fully opening a fourth-stage inter-stage reheater heat storage medium side inlet isolation valve V43 and a fourth-stage reheater heat storage medium side outlet isolation valve V45, and sending out an instruction of automatically controlling a first-stage inter-stage reheater heat storage medium side inlet adjusting valve V35, a second-stage inter-stage reheater heat storage medium side inlet adjusting valve V38, a third-stage inter-stage reheater heat storage medium side inlet adjusting valve V41 and a fourth-stage inter-stage reheater heat storage medium side inlet adjusting valve V44 to respectively input a first-stage inter-stage reheater outlet air temperature T2, a second-stage inter-stage reheater outlet air temperature T6, a third-stage inter-stage reheater outlet air temperature T10 and a fourth-stage inter-stage reheater outlet air temperature T14. If both of the above conditions are met, step 135 is performed.
In an example of an application of the method, the second predetermined opening may be 50%, and the implementation may be determined according to the actual situation.
Step 135, judging whether 1) the outlet isolation valve V63 of the fourth-stage air storage chamber is fully opened; 2) The inlet cut-off valve V14 of the fourth-stage air expander is fully opened; 3) The fourth stage inter-stage reheater outlet air pressure P14 and the fourth stage inter-stage reheater outlet air temperature T14 have satisfied the fourth stage air expander 4 start-up intake air requirement. If any one of the three conditions is not met or any multiple conditions are not met, step 136 is performed, a command of fully opening the fourth stage air storage chamber outlet isolation valve V63 is sent out, a command of fully opening the fourth stage air expansion machine inlet cutoff valve V14 is sent out, and the condition that the fourth stage interstage reheater outlet air pressure P14 and the fourth stage interstage reheater outlet air temperature T14 meet the starting air intake requirement of the fourth stage air expansion machine 4 is waited. If the above conditions are all satisfied, proceed to step 137.
Step 137, determine if the fourth stage air expander bypass trim valve V16 is fully closed. If the fourth stage air expander bypass trim valve V16 is not fully closed, then step 138 is performed in which a command is issued to fully close the fourth stage air expander bypass trim valve V16. If the fourth stage air expander bypass trim valve V16 is fully closed, step 139 is performed.
Steps 128-138 are performed to meet the inter-stage reheat air expansion generator set start-up conditions.
Step 139, judging whether 1) the inlet regulating valve V15 of the fourth-stage air expander is automatically controlled by the rotating speed S5 of the rotor of the fourth-stage air expander; 2) The rotor rotating speed S2 of the first-stage air expander, the rotor rotating speed S3 of the second-stage air expander, the rotor rotating speed S4 of the third-stage air expander and the rotor rotating speed S5 of the fourth-stage air expander are increased to a first preset rotating speed according to a first preset acceleration rate; 3) The first clutch 7, the second clutch 8 and the third clutch 9 are already in an engaged state. If any one of the above three conditions is not satisfied, or any plurality of conditions are not satisfied, step 140 is performed to issue an instruction for automatically controlling the rotational speed S5 of the fourth stage air expander rotor by the fourth stage air expander inlet adjustment valve V15, and wait for the rotational speed S2 of the first stage air expander rotor, the rotational speed S3 of the second stage air expander rotor, the rotational speed S4 of the third stage air expander rotor, and the rotational speed S5 of the fourth stage air expander rotor to increase to a first preset rotational speed according to a first preset acceleration rate, and for the first clutch 7, the second clutch 8, and the third clutch 9 to be in an engaged state. If both of the above conditions are satisfied, step 141 is performed.
In one example of the method, the first predetermined acceleration rate may be 33000rpm/min, and the first predetermined rotation speed may be 2000rpm, which may be determined according to practical situations.
The purpose of steps 139-140 is to enable the unit to be started quickly to meet the safety requirements.
And step 141, judging whether the rotor speed S2 of the first-stage air expander, the rotor speed S3 of the second-stage air expander, the rotor speed S4 of the third-stage air expander and the rotor speed S5 of the fourth-stage air expander are increased to a second preset speed according to a second preset acceleration rate. And if the rotor speed S2 of the first stage air expander, the rotor speed S3 of the second stage air expander, the rotor speed S4 of the third stage air expander and the rotor speed S5 of the fourth stage air expander have increased to a second preset speed according to a second preset acceleration rate, performing step 142.
In one embodiment of the method, the second predetermined acceleration rate may be 12000rpm/min, and the second predetermined rotation speed may be 20000rpm, depending on the actual application.
Step 142, judging whether 1) the second preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 143 is performed.
In an example of an application of the method, the second predetermined time may be 6 minutes, which may be determined according to the actual implementation.
The purpose of steps 141-142 is to raise the speed of the unit to a warm-up value and complete the warm-up process.
And step 143, judging whether the rotor rotation speed S2 of the first-stage air expansion machine, the rotor rotation speed S3 of the second-stage air expansion machine, the rotor rotation speed S4 of the third-stage air expansion machine and the rotor rotation speed S5 of the fourth-stage air expansion machine are increased to a third preset rotation speed according to a third preset acceleration rate. If the first stage air expander rotor speed S2, the second stage air expander rotor speed S3, the third stage air expander rotor speed S4, and the fourth stage air expander rotor speed S5 have increased to a third predetermined speed according to a third predetermined acceleration rate, proceed to step 144.
In an example of an application of the method, the third predetermined acceleration rate may be 33000rpm/min, and the third predetermined rotation speed may be 30000rpm, which may be determined according to practical situations.
Step 144, determining whether 1) the third predetermined time has been delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 145 is performed.
In an example of an application of the method, the third predetermined time may be 6 minutes, which may be determined according to the actual implementation.
The purpose of steps 143 to 144 is to allow the unit speed to quickly cross the critical zone.
And step 145, judging whether the rotor speed S2 of the first-stage air expander, the rotor speed S3 of the second-stage air expander, the rotor speed S4 of the third-stage air expander and the rotor speed S5 of the fourth-stage air expander are increased to a fourth preset speed according to a fourth preset acceleration rate. If the first stage air expander rotor speed S2, the second stage air expander rotor speed S3, the third stage air expander rotor speed S4, and the fourth stage air expander rotor speed S5 have increased to a fourth predetermined speed according to a fourth predetermined acceleration rate, proceed to step 146.
In an example of an application of the method, the fourth predetermined acceleration rate may be 6000rpm/min, and the fourth predetermined rotation speed may be 35000rpm, which may be implemented as the case may be.
Step 146, determining whether 1) the fourth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If both of the above conditions are satisfied, step 147 is performed.
In an example of an application of the method, the fourth predetermined time may be 15 minutes, which may be determined according to the actual implementation.
The purpose of steps 145-146 is to bring the unit speed up to the rated value to complete the unit speed-up process.
Step 147, judging whether 1) the generator 6 is connected to the grid; 2) And the inlet regulating valve V15 of the fourth-stage air expansion machine is automatically controlled by the load of the unit. If either one of the two conditions is not met or both the two conditions are not met, the step 148 is carried out, a command of grid connection of the generator 6 is sent out, and a command of putting the inlet regulating valve V15 of the fourth-stage air expander into the automatic control of the unit load is sent out. If both of the above conditions are satisfied, step 149 is performed.
Step 149, determine whether the load of the unit has increased to the first predetermined load ratio. If the unit load has increased to the first predetermined load ratio, proceed to step 150.
In an embodiment of the method, the first predetermined load ratio may be 15%, which may be determined according to the actual situation.
Step 150, judging whether 1) the fifth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If the above conditions are all satisfied, proceed to step 151.
In an example of an application of the method, the fifth predetermined time may be 30 minutes, which may be determined according to the actual implementation.
And 151, judging whether the load of the unit is increased to a second preset load proportion. If the unit load has increased to the second predetermined load ratio, go to step 152.
In an example of an application of the method, the second predetermined load ratio may be 100%, and the specific implementation may be determined according to the actual situation.
Step 152, judging whether 1) the sixth preset time is delayed; 2) All relevant operation parameters of the unit are normal. If the above conditions are all satisfied, the entire startup sequence of the expansion power generation system is ended.
In an example of an application of the method, the sixth predetermined time may be 60 minutes, which may be determined according to the actual implementation.
The purpose of steps 147-152 is to continue increasing the unit to the rated load after grid connection and warming up with the initial load, thereby finishing the whole starting step of the expansion power generation system.
The application example of the method also provides an operation control method of the expansion power generation system, the execution main body of the operation control method can be a computer control system or a distributed control system, and the operation control method mainly comprises the following steps:
step 201, judging whether the load of the inter-stage reheating type air expansion generator set is reduced to a third preset load proportion. If the unit load has decreased to the third predetermined load ratio, proceed to step 202.
In an example of an application of the method, the third predetermined load ratio may be 3%, which may be determined according to actual conditions.
Step 202, judging whether 1) the first stage air expander inlet shut-off valve V2, the second stage air expander inlet shut-off valve V6, the third stage air expander inlet shut-off valve V10 and the fourth stage air expander inlet shut-off valve V14 are completely closed; 2) The first stage air expander inlet trim valve V3, the second stage air expander inlet trim valve V7, the third stage air expander inlet trim valve V11 and the fourth stage air expander inlet trim valve V15 are fully closed; 3) The first stage air reservoir outlet isolation valve V60, the second stage air reservoir outlet isolation valve V61, the third stage air reservoir outlet isolation valve V62 and the fourth stage air reservoir outlet isolation valve V63 are fully closed; 4) The first stage air reservoir outlet regulating valve V1, the second stage air reservoir outlet regulating valve V5, the third stage air reservoir outlet regulating valve V9 and the fourth stage air reservoir outlet regulating valve V13 are completely closed; 5) The first stage air expander bypass trim valve V4, the second stage air expander bypass trim valve V8, the third stage air expander bypass trim valve V12 and the fourth stage air expander bypass trim valve V16 have been fully opened; 6) A first inter-stage reheater heat storage medium side inlet isolation valve V34 and a first inter-stage reheater heat storage medium side outlet isolation valve V36, and a second inter-stage reheater heat storage medium side inlet isolation valve V37 and a second inter-stage reheater heat storage medium side outlet isolation valve V39, and a third inter-stage reheater heat storage medium side inlet isolation valve V40 and a third inter-stage reheater heat storage medium side outlet isolation valve V42, and a fourth inter-stage reheater heat storage medium side inlet isolation valve V43 and a fourth inter-stage reheater heat storage medium side outlet isolation valve V45 are fully closed; 7) The first inter-stage reheater heat storage medium side inlet trim valve V35, the second inter-stage reheater heat storage medium side inlet trim valve V38, the third inter-stage reheater heat storage medium side inlet trim valve V41, and the fourth inter-stage reheater heat storage medium side inlet trim valve V44 are fully closed; 8) The generator reverse power protection is triggered. If any one of the eight conditions is not satisfied, or any plurality of the conditions are not satisfied, step 203 is performed to give an instruction to fully close the first stage air expander inlet cutoff valve V2, the second stage air expander inlet cutoff valve V6, the third stage air expander inlet cutoff valve V10 and the fourth stage air expander inlet cutoff valve V14, an instruction to fully close the first stage air expander inlet adjustment valve V3, the second stage air expander inlet adjustment valve V7, the third stage air expander inlet adjustment valve V11 and the fourth stage air expander inlet adjustment valve V15, an instruction to fully close the first stage air storage chamber outlet isolation valve V60, the second stage air storage chamber outlet isolation valve V61, the third stage air storage chamber outlet isolation valve V62 and the fourth stage air storage chamber outlet isolation valve V63, and an instruction to fully close the first stage air storage chamber outlet adjustment valve V1, the second stage air storage chamber outlet adjustment valve V5, the third stage air storage chamber outlet adjustment valve V9 and the fourth stage air storage chamber outlet adjustment valve V13, issuing an instruction to fully open the first stage air expander bypass trim valve V4, the second stage air expander bypass trim valve V8, the third stage air expander bypass trim valve V12 and the fourth stage air expander bypass trim valve V16, issuing an instruction to fully close the first stage inter-stage reheater heat-storage medium side inlet isolation valve V34 and the first stage inter-stage reheater heat-storage medium side outlet isolation valve V36, issuing an instruction to fully close the second stage inter-stage reheater heat-storage medium side inlet isolation valve V37 and the second stage inter-stage reheater heat-storage medium side outlet isolation valve V39, issuing an instruction to fully close the third stage reheater heat-storage medium side inlet isolation valve V40 and the third stage reheater heat-storage medium side outlet isolation valve V42, issuing an instruction to fully close the fourth stage reheater heat-storage medium side inlet isolation valve V43 and the fourth stage reheater heat-storage medium side outlet isolation valve V45, and sending out instructions for fully closing the first-stage inter-stage reheater heat storage medium side inlet adjusting valve V35, the second-stage inter-stage reheater heat storage medium side inlet adjusting valve V38, the third-stage inter-stage reheater heat storage medium side inlet adjusting valve V41 and the fourth-stage inter-stage reheater heat storage medium side inlet adjusting valve V44, and waiting for triggering of generator reverse power protection. If both of the above conditions are satisfied, step 204 is performed.
The purpose of the steps 201-204 is to firstly reduce the load of the unit program to an extremely low value, then completely close the inlet cut-off valve and the inlet adjusting valve of each stage of air expansion machine and trigger the reverse power protection of the generator, and finally stop the inter-stage reheating type air expansion generator unit.
(1) A first parallel flow:
step 204, determining whether the frequency of the frequency converter of the operated high-temperature heat storage medium pump is reduced to a first preset frequency. If the frequency of the frequency converter of the operated high-temperature heat storage medium pump is not reduced to the first preset frequency, step 205 is performed to issue an instruction that the frequency of the frequency converter of the operated high-temperature heat storage medium pump is reduced to the first preset frequency. If the frequency of the inverter of the operated high temperature heat storage medium pump has decreased to the first predetermined frequency, proceed to step 206.
In an example of an application of the method, the first predetermined frequency may be 15Hz, which may be implemented according to the actual situation. The working frequency of the frequency converter of the operated high-temperature heat storage medium pump is reduced to below 15Hz (inclusive) and then the frequency converter is stopped, so that the impact on a pipeline when the pump is stopped can be reduced.
Step 206, determine if the high temperature heat storage medium pump that is not running has released the startup backup pump interlock. If the high-temperature heat storage medium pump which is not operated does not release the starting backup pump interlock, step 207 is performed, and an instruction for releasing the starting backup pump interlock of the high-temperature heat storage medium pump which is not operated is sent. If the non-operating high temperature heat storage medium pump has deactivated the backup pump interlock, step 208 is performed.
And step 208, judging whether the outlet isolation valve of the running high-temperature heat storage medium pump is completely closed. If the operated high temperature heat storage medium pump outlet isolation valve is not fully closed, step 209 is performed to issue a command to fully close the operated high temperature heat storage medium pump outlet isolation valve. If the already operating high temperature thermal storage medium pump outlet isolation valve is fully closed, step 210 is performed.
Step 210, judging whether the first high temperature heat storage medium pump 30 and the second high temperature heat storage medium pump 31 are stopped. If the first high temperature heat storage medium pump 30 or the second high temperature heat storage medium pump 31 is not shut down, step 211 is executed to issue an instruction to shut down the first high temperature heat storage medium pump 30 and the second high temperature heat storage medium pump 31. If the first high temperature heat storage medium pump 30 and the second high temperature heat storage medium pump 31 have been shut down, step 212 is performed.
Step 212, judging whether 1) the first high temperature heat storage medium pump inlet isolation valve V28 and the second high temperature heat storage medium pump inlet isolation valve V30 are completely closed; 2) The first conventional nitrogen seal inlet isolation valve V26 and the second conventional nitrogen seal inlet isolation valve V27 are fully closed. If either or both of the above conditions are not met, then step 213 is performed to issue a command to fully close the first high temperature heat storage medium pump inlet isolation valve V28 and the second high temperature heat storage medium pump inlet isolation valve V30, and to fully close the first conventional nitrogen seal inlet isolation valve V26 and the second conventional nitrogen seal inlet isolation valve V27. If both of the above conditions are met, step 214 is performed.
In step 214, it is determined whether the seventh preset time is delayed. If the seventh predetermined time has been delayed, go to step 215.
In an embodiment of the method, the seventh predetermined time may be 15 minutes, which may be determined according to the actual situation.
Step 215, judging whether 1) the first high temperature heat storage medium pump cooling water inlet isolation valve V50 and the first high temperature heat storage medium pump cooling water outlet isolation valve V51 are completely closed; 2) The second high temperature heat storage medium pump cooling water inlet isolation valve V52 and the second high temperature heat storage medium pump cooling water outlet isolation valve V53 are fully closed. If either of the two conditions is not satisfied, or both of the two conditions are not satisfied, step 216 is performed to issue a command to fully close the first high-temperature heat storage medium pump cooling water inlet isolation valve V50 and the first high-temperature heat storage medium pump cooling water outlet isolation valve V51, and to issue a command to fully close the second high-temperature heat storage medium pump cooling water inlet isolation valve V52 and the second high-temperature heat storage medium pump cooling water outlet isolation valve V53. If the above conditions are all satisfied, the first parallel flow ends.
The purpose of steps 204-216 is to shut down the heat storage medium subsystem.
(2) A second parallel flow:
and step 204, judging whether the rotor rotation speed S2 of the first-stage air expansion machine, the rotor rotation speed S3 of the second-stage air expansion machine, the rotor rotation speed S4 of the third-stage air expansion machine and the rotor rotation speed S5 of the fourth-stage air expansion machine are idle to 0rpm. If the first stage air expander rotor speed S2, the second stage air expander rotor speed S3, the third stage air expander rotor speed S4, and the fourth stage air expander rotor speed S5 have been idled to 0rpm, step 205 is performed.
Step 205, judging whether 1) the first stage air expander sealing air inlet isolation valve V17, the second stage air expander sealing air inlet isolation valve V18, the third stage air expander sealing air inlet isolation valve V19 and the fourth stage air expander sealing air inlet isolation valve V20 are completely closed; 2) The first stage air storage chamber air supply expander sealing air outlet isolation valve V64, the second stage air storage chamber air supply expander sealing air outlet isolation valve V65, the third stage air storage chamber air supply expander sealing air outlet isolation valve V63 and the fourth stage air storage chamber air supply expander sealing air outlet isolation valve V67 are completely closed. If either of the two conditions is not satisfied, or both of the two conditions are not satisfied, then step 206 is performed to issue an instruction to fully close the first stage air expander sealing air inlet isolation valve V17, the second stage air expander sealing air inlet isolation valve V18, the third stage air expander sealing air inlet isolation valve V19 and the fourth stage air expander sealing air inlet isolation valve V20, and to issue an instruction to fully close the first stage air storage chamber air expander sealing air outlet isolation valve V64, the second stage air storage chamber air expander sealing air outlet isolation valve V65, the third stage air storage chamber air expander sealing air outlet isolation valve V63 and the fourth stage air storage chamber air expander sealing air outlet isolation valve V67. If both of the above conditions are satisfied, proceed to step 207.
Step 207, determining whether the first stage air expander rotor speed S2, the second stage air expander rotor speed S3, the third stage air expander rotor speed S4, and the fourth stage air expander rotor speed S5 idle to 0rpm has been delayed for an eighth predetermined time, or whether the gearbox reducer first end bearing temperature T19 and the gearbox reducer second end bearing temperature T20, and the first stage air expander first end bearing temperature T21 and the first stage air expander second end bearing temperature T22, and the second stage air expander first end bearing temperature T23 and the second stage air expander second end bearing temperature T24, and the third stage air expander first end bearing temperature T25 and the third stage air expander second end bearing temperature T26, and the fourth stage air expander first end bearing temperature T27 and the fourth stage air expander second end bearing temperature T28, and the first clutch oil return temperature T38, and the second clutch oil return temperature T41, and the third clutch oil return temperature T44 have been less than the first predetermined temperature. If the first stage air expander rotor speed S2, the second stage air expander rotor speed S3, the third stage air expander rotor speed S4 and the fourth stage air expander rotor speed S5 coast to 0rpm for an eighth predetermined time, or the gearbox retarder first end bearing temperature T19 and the gearbox retarder second end bearing temperature T20, and the first stage air expander first end bearing temperature T21 and the first stage air expander second end bearing temperature T22, and the second stage air expander first end bearing temperature T23 and the second stage air expander second end bearing temperature T24, and the third stage air expander first end bearing temperature T25 and the third stage air expander second end bearing temperature T26, and the fourth stage air expander first end bearing temperature T27 and the fourth stage air expander second end bearing temperature T28, and the first clutch oil return temperature T38, and the second clutch oil return temperature T41, and the third clutch oil return temperature T44 have been less than the first predetermined temperature, step 208 is performed.
In an example of an application of the method, the eighth predetermined time may be 20 minutes, the first predetermined temperature may be 50 ℃, and the specific implementation may be determined according to actual conditions.
And step 208, judging whether the AC lubricating oil pump and the DC accident oil pump 21 which are not operated are unlocked or not. If the ac lube pump is not operated or the dc accident oil pump 21 does not release the start-up backup pump interlock, step 209 is performed to issue a command to the ac lube pump not operated and the dc accident oil pump 21 to release the start-up backup pump interlock. If the ac lube pump and dc fault pump 21 are not operating and the backup pump interlock is deactivated, step 210 is performed.
In step 210, it is determined whether the first ac lubricating oil pump 19 and the second ac lubricating oil pump 20 are stopped. If the first ac lubricating oil pump 19 or the second ac lubricating oil pump 20 is not stopped, step 211 is performed to issue a command to stop the first ac lubricating oil pump 19 and the second ac lubricating oil pump 20. If the first ac lube pump 19 and the second ac lube pump 20 are off, step 212 is performed.
Step 212, judging whether 1) the isolating main valve V21 of the isolating air inlet of each stage of air expander is completely closed; 2) The first stage air expander isolation air inlet isolation valve V22, the second stage air expander isolation air inlet isolation valve V23, the third stage air expander isolation air inlet isolation valve V24 and the fourth stage air expander isolation air inlet isolation valve V25 are fully closed; 3) First and second lubricating oil cooling water inlet isolation valves V46 and V48, and first and second lubricating oil cooling water outlet isolation valves V47 and V49 are fully closed. If any one of the above three conditions is not satisfied, or any plurality of conditions are not satisfied, step 213 is performed to issue a command to fully close the air expander isolation air inlet main isolation valve V21 at each stage, issue a command to fully close the first stage air expander isolation air inlet isolation valve V22, the second stage air expander isolation air inlet isolation valve V23, the third stage air expander isolation air inlet isolation valve V24, and the fourth stage air expander isolation air inlet isolation valve V25, issue a command to fully close the first lubricating oil cooling water inlet isolation valve V46 and the second lubricating oil cooling water inlet isolation valve V48, and issue a command to fully close the first lubricating oil cooling water outlet isolation valve V47 and the second lubricating oil cooling water outlet isolation valve V49. If the above conditions are all satisfied, the second parallel flow ends.
The purpose of steps 204-213 is to stop the supply of seal air, lubricating oil, isolation air and cooling water in sequence after the inter-stage reheating type air expansion generator set is deactivated.
And after the first parallel flow and the second parallel flow are finished, finishing the shutdown step of all the expansion power generation systems.
The application example of the method also provides a program control logic of the expansion power generation system in the energy release stage of the compressed air energy storage power station. The following functions can be realized by the program control logic:
the method has the advantages that firstly, the combined operation of the interstage reheating air expansion generating set, the heat storage medium subsystem, the conventional lubricating oil system, the conventional plant cooling water system, the conventional nitrogen making system and the conventional nitrogen sealing device is realized, and the stable operation of all stages of air expanders of the interstage reheating air expansion generating set of the energy release stage expansion generating system near a rated working point is realized when the air storage chamber is changed in the variable working condition operation of the energy storage stage through the clutch, so that the safe and stable operation of all relevant equipment is ensured while the operation efficiency of the set, the system and the whole compressed air energy storage power station is improved;
secondly, under the full stop state of the expansion power generation system in the energy release stage, the automatic start of the expansion power generation system is realized;
Thirdly, under the running state of the expansion power generation system in the energy release stage, the automatic shutdown of the expansion power generation system is realized;
fourthly, when the expansion power generation system in the energy release stage is started or the operation of the shutdown program reaches a certain step, if the condition is not met but the condition can be ignored by human judgment, the step jump action can be manually carried out to continue the operation of the start or shutdown program until the expansion power generation system is started or stopped.
Each step in the operation control method provided by the application example of the application program firstly judges whether the feedback is received, and if the feedback is received, the next step is continued; and if the feedback is not received, sending a corresponding instruction and waiting for feedback. When the due feedback signal is not received, the program control logic stays at the step and waits for the worker to operate. The power plant operating personnel can find out the feedback signals which are not received by the current operation step sequence and artificially judge whether the feedback signals which are not received influence the continuous execution of the program control logic. If the feedback signal does not influence the continuation of the current program control logic, the operator can operate the step jump action to continue the execution of the program control logic; if the feedback signal influences the continuation of the current program control logic, the operator can pertinently check the problem according to each found unsatisfied feedback signal until receiving the feedback signal and continuously executing the program control logic.
The operation control method provided by the application example can realize the automatic start of the expansion power generation system in the full stop state of the expansion power generation system in the energy release stage; and in the energy release stage, expansion is realized under the operation state of the expansion power generation system.
The expansion power generation system realizes the combined operation of an interstage reheating type air expansion power generation unit, a heat storage medium subsystem, a conventional lubricating oil system, a conventional plant cooling water system, a conventional nitrogen production system and a conventional nitrogen sealing device, and realizes that each stage of air expander of the interstage reheating type air expansion power generation unit of the energy release stage expansion power generation system stably operates near a rated working condition point when the grade of an air storage chamber is changed during the variable working condition operation of the energy storage stage through a clutch, so that the safe and stable operation of each related device is ensured while the operation efficiency of the unit, the system and the whole compressed air energy storage power station is improved. In addition, the expansion power generation system provided by the application example of the method can realize automatic starting in the full stop state of the energy release stage and automatic stop in the running state; and considering artificial judgment, the jumping operation of the program control logic of the expansion power generation system can be realized, when the operation condition of a certain step of the program control logic is not met, so that the step sequence cannot be carried out, whether the condition can be ignored and the jumping action can be operated or not can be artificially judged, and the operation of the program control logic is continued until the starting or the stopping is finished.
In terms of software, in order to effectively improve the operation stability of the expansion power generation process of the compressed air energy storage power station, and effectively improve the operation safety and stability of each relevant device while effectively improving the expansion power generation efficiency, the present application provides an embodiment of an operation control device of an expansion power generation system for executing all or part of the contents in an operation control method of the expansion power generation system, and referring to fig. 5, the operation control device of the expansion power generation system specifically includes the following contents:
a preprocessing module 10000, configured to perform start preprocessing on the heat storage medium subsystem and the inter-stage reheat air expansion generator set if it is determined that the inter-stage reheat air expansion generator set and the heat storage medium subsystem both operate normally;
the expansion power generation operation control module 20000 is used for selecting at least one corresponding interstage reheating type air expansion generator set as a current target control object according to a target operation condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that the single current control object meets the starting condition of the interstage reheating type air expansion generator set;
Wherein the start-up control procedure of the expansion power generation of the target control object includes: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; and controlling the target control object to execute a grid connection and initial load warming process, and controlling the target control object degree load to continuously increase to a rated load so as to complete the starting process of the expansion power generation corresponding to the target control object.
The embodiment of the operation control device for an expansion power generation system provided by the present application may be specifically used for executing the processing procedure of the embodiment of the operation control method for an expansion power generation system in the foregoing embodiment, and the function of the embodiment is not described herein again, and reference may be made to the detailed description of the embodiment of the method.
As can be seen from the above description, the operation control device of the expansion power generation system provided in the embodiment of the present application, on the basis of ensuring the operation efficiency of the whole compressed air energy storage power station by providing the inter-stage reheat type air expansion generator set and the heat storage medium subsystem, by controllably connecting the air expanders in series, each set of reheat air storage modules are connected in parallel, and each reheat air storage module includes an inter-stage reheater and an air storage chamber connected in sequence with the corresponding air expander; each air storage chamber is respectively connected with each air compressor in the compressed air energy storage power station in the energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem, so that when the air storage chamber is operated under variable working conditions in the energy storage stage to change the grade, each air expander of the inter-stage reheating type air expansion power generator set of the energy release stage expansion power generation system can stably operate near a rated working condition point, and the operation stability of the expansion power generation process of the compressed air energy storage power station can be effectively improved; the expansion power generation efficiency can be effectively improved, the operation efficiency of the whole compressed air energy storage power station can be effectively improved, the operation safety and stability of each relevant device can be effectively improved while the operation efficiency of a unit, a system and the whole compressed air energy storage power station is improved, and the safe and stable operation of each relevant device can be ensured; and the operation reliability of the expansion power generation process of the compressed air energy storage power station can be effectively improved, and the operation reliability of the whole compressed air energy storage power station can be further effectively improved.
In order to effectively improve the operation stability of the expansion power generation process of the compressed air energy storage power station and effectively improve the operation safety and stability of each relevant device while effectively improving the expansion power generation efficiency, the application provides an embodiment of an electronic device for realizing all or part of the contents in the operation control method of the expansion power generation system, and the electronic device specifically includes the following contents:
fig. 6 is a schematic block diagram of a system configuration of an electronic device 9600 according to the embodiment of the present application. As shown in fig. 6, the electronic device 9600 can include a central processor 9100 and a memory 9140; the memory 9140 is coupled to the central processor 9100. Notably, this FIG. 6 is exemplary; other types of structures may also be used in addition to or in place of the structures to implement telecommunications or other functions.
In one embodiment, the operation control functions of the expansion power generation system may be integrated into a central processor.
Wherein the central processor may be configured to control:
step 1000: and if it is determined that the inter-stage reheat air expansion generator set and the heat storage medium subsystem operate normally, performing starting pretreatment on the heat storage medium subsystem and the inter-stage reheat air expansion generator set.
Step 2000: selecting at least one corresponding interstage reheating type air expansion generator set as a current target control object according to a target operation condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that a single current control object meets a starting condition of the interstage reheating type air expansion generator set, wherein the starting control process of the expansion power generation of the target control object comprises the following steps: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; and controlling the target control object to execute a grid connection and initial load warming process, and controlling the target control object degree load to continuously increase to a rated load so as to complete the starting process of the expansion power generation corresponding to the target control object.
As can be seen from the foregoing description, in the electronic device provided in the embodiment of the present application, on the basis of ensuring the operation efficiency of the entire compressed air energy storage power plant by providing the inter-stage reheat type air expansion generator set and the heat storage medium subsystem, each set of reheat air storage modules are connected in parallel by being connected in series in a controllable manner between the respective air expansion machines, and each reheat air storage module includes an inter-stage reheater and an air storage chamber connected in sequence to the corresponding air expansion machine; each air storage chamber is respectively connected with each air compressor in the compressed air energy storage power station in the energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem, so that when the air storage chamber level is changed during variable working condition operation in the energy storage stage, each air expander of the inter-stage reheating type air expansion power generating unit of the energy release stage expansion power generation system can stably operate near a rated working condition point, and the operation stability of the expansion power generation process of the compressed air energy storage power station can be effectively improved; the expansion power generation efficiency can be effectively improved, the operation efficiency of the whole compressed air energy storage power station can be effectively improved, the operation safety and stability of each relevant device can be effectively improved while the operation efficiency of a unit, a system and the whole compressed air energy storage power station is improved, and the safe and stable operation of each relevant device can be ensured; and the operation reliability of the expansion power generation process of the compressed air energy storage power station can be effectively improved, and the operation reliability of the whole compressed air energy storage power station can be further effectively improved.
In another embodiment, the operation control device of the expansion power generation system may be configured separately from the central processor 9100, for example, the operation control device of the expansion power generation system may be configured as a chip connected to the central processor 9100, and the operation control function of the expansion power generation system may be realized by the control of the central processor.
As shown in fig. 6, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is noted that the electronic device 9600 also does not necessarily include all of the components shown in fig. 6; further, the electronic device 9600 may further include components not shown in fig. 6, which may be referred to in the art.
As shown in fig. 6, a central processor 9100, sometimes referred to as a controller or operational control, can include a microprocessor or other processor device and/or logic device, which central processor 9100 receives input and controls the operation of the various components of the electronic device 9600.
The memory 9140 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The information relating to the failure may be stored, and a program for executing the information may be stored. And the central processing unit 9100 can execute the program stored in the memory 9140 to realize information storage or processing, or the like.
The input unit 9120 provides input to the central processor 9100. The input unit 9120 is, for example, a key or a touch input device. Power supply 9170 is used to provide power to electronic device 9600. The display 9160 is used for displaying display objects such as images and characters. The display may be, for example, an LCD display, but is not limited thereto.
The memory 9140 can be a solid state memory, e.g., read Only Memory (ROM), random Access Memory (RAM), a SIM card, or the like. There may also be a memory that holds information even when power is off, can be selectively erased, and is provided with more data, an example of which is sometimes referred to as an EPROM or the like. The memory 9140 could also be some other type of device. Memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application/function storage portion 9142, the application/function storage portion 9142 being used for storing application programs and function programs or for executing a flow of operations of the electronic device 9600 by the central processor 9100.
The memory 9140 can also include a data store 9143, the data store 9143 being used to store data, such as contacts, digital data, pictures, sounds, and/or any other data used by an electronic device. The driver storage portion 9144 of the memory 9140 may include various drivers of the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging applications, contact book applications, etc.).
The communication module 9110 is a transmitter/receiver 9110 that transmits and receives signals via an antenna 9111. The communication module (transmitter/receiver) 9110 is coupled to the central processor 9100 to provide input signals and receive output signals, which may be the same as in the case of a conventional mobile communication terminal.
A plurality of communication modules 9110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, can be provided in the same electronic device based on different communication technologies. The communication module (transmitter/receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and receive audio input from the microphone 9132 to implement general telecommunications functions. The audio processor 9130 may include any suitable buffers, decoders, amplifiers and so forth. In addition, the audio processor 9130 is also coupled to the central processor 9100, thereby enabling recording locally through the microphone 9132 and enabling locally stored sounds to be played through the speaker 9131.
An embodiment of the present application further provides a computer-readable storage medium capable of implementing all the steps in the operation control method of the expansion power generation system in the above embodiment, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the computer program implements all the steps of the operation control method of the expansion power generation system, where an execution subject of the computer program is a server or a client, for example, when the processor executes the computer program, the processor implements the following steps:
Step 1000: and if it is determined that the inter-stage reheat air expansion generator set and the heat storage medium subsystem operate normally, performing starting pretreatment on the heat storage medium subsystem and the inter-stage reheat air expansion generator set.
Step 2000: selecting at least one corresponding inter-stage reheat type air expansion generator set as a current target control object according to a target operation condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that a single current control object meets the starting condition of the inter-stage reheat type air expansion generator set, wherein the starting control process of the expansion power generation of the target control object comprises the following steps: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; and controlling the target control object to execute a grid connection and initial load warming process, and controlling the target control object degree load to continuously increase to a rated load so as to complete the starting process of the expansion power generation corresponding to the target control object.
As can be seen from the above description, the computer-readable storage medium provided in the embodiments of the present application, on the basis of ensuring the operation efficiency of the entire compressed air energy storage power plant by providing the inter-stage reheat air expansion generator set and the heat storage medium subsystem, each set of the reheat air storage modules is connected in parallel by being controllably connected in series with each other, and each reheat air storage module includes an inter-stage reheater and an air storage chamber connection which are sequentially connected with the corresponding air expansion module; each air storage chamber is respectively connected with each air compressor in the compressed air energy storage power station in the energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem, so that when the air storage chamber level is changed during variable working condition operation in the energy storage stage, each air expander of the inter-stage reheating type air expansion power generating unit of the energy release stage expansion power generation system can stably operate near a rated working condition point, and the operation stability of the expansion power generation process of the compressed air energy storage power station can be effectively improved; the expansion power generation efficiency can be effectively improved, the operation efficiency of the whole compressed air energy storage power station can be effectively improved, the operation safety and stability of each relevant device can be effectively improved while the operation efficiency of a unit, a system and the whole compressed air energy storage power station is improved, and the safe and stable operation of each relevant device can be ensured; and the operation reliability of the expansion power generation process of the compressed air energy storage power station can be effectively improved, and the operation reliability of the whole compressed air energy storage power station can be further effectively improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (32)

1. An expansion power generation system for a compressed air energy storage power plant, comprising: the system comprises a plurality of inter-stage reheat type air expansion generator sets, a first conventional nitrogen sealing device, a second conventional nitrogen sealing device and a heat storage medium subsystem for performing high-temperature heat storage and low-temperature heat storage on each inter-stage reheat type air expansion generator set;
each of the inter-stage reheat air expansion generator sets includes: the system comprises an air expander and a group of reheated air storage components connected with the air expander; each air expander is connected in series in a controllable manner, and each group of reheating air storage components are connected in parallel;
each reheat gas storage subassembly all includes: the system comprises an interstage reheater and an air storage chamber which are sequentially connected with corresponding air expanders; each gas storage chamber is respectively connected with each air compressor in a compressed air energy storage power station in an energy storage stage in a one-to-one mode, and each inter-stage reheater is respectively connected to the heat storage medium subsystem;
the air compressor in the compressed air energy storage power station comprises: a first stage air compressor, a second stage air compressor, a third stage air compressor and a fourth stage air compressor;
Correspondingly, the interstage reheated air expansion generator set comprises: the system comprises a first inter-stage reheating type air expansion generator set, a second inter-stage reheating type air expansion generator set, a third inter-stage reheating type air expansion generator set and a fourth inter-stage reheating type air expansion generator set;
the first interstage reheat air expansion genset includes: a first stage air expander connected to the first stage air compressor via a first stage inter-stage reheater and a first stage air receiver connected in series;
the second interstage reheat air expansion genset includes: a second stage air expander connected to the second stage air compressor via a second stage inter-stage reheater and a second stage air receiver connected in series;
the inter-third stage reheat air expansion generator set includes: a third stage air expander connected to the third stage air compressor via a third stage interstage reheater and a third stage air receiver connected in series;
the fourth interstage reheat air expansion generator set includes: a fourth stage air expander connected to the fourth stage air compressor via a fourth stage inter-stage reheater and a fourth stage air receiver connected in series;
The first-stage air expander, the second-stage air expander, the third-stage air expander and the fourth-stage air expander are sequentially connected;
a first clutch is arranged between the first-stage air expander and the second-stage air expander; a second clutch is arranged between the second-stage air expander and the third-stage air expander; a third clutch is arranged between the third-stage air expander and the fourth-stage air expander;
the heat storage medium subsystem comprises a first high-temperature heat storage medium pump, a second high-temperature heat storage medium pump, a high-temperature heat storage medium tank and a low-temperature heat storage medium tank;
the first high-temperature heat storage medium pump is respectively connected to the inlet sides of the first stage inter-stage reheater, the second stage inter-stage reheater, the third stage inter-stage reheater and the fourth stage inter-stage reheater;
the second high-temperature heat storage medium pump is a spare medium pump of the first high-temperature heat storage medium pump and is also connected to the inlet sides of the first stage inter-stage reheater, the second stage inter-stage reheater, the third stage inter-stage reheater and the fourth stage inter-stage reheater respectively;
the high-temperature heat storage medium tank is respectively connected to the inlet sides of the first-stage inter-stage reheater, the second-stage inter-stage reheater, the third-stage inter-stage reheater and the fourth-stage inter-stage reheater;
The low-temperature heat storage medium tank is respectively connected to the outlet sides of the first-stage inter-stage reheater, the second-stage inter-stage reheater, the third-stage inter-stage reheater and the fourth-stage inter-stage reheater;
the first conventional nitrogen sealing device is connected to the high-temperature heat storage medium tank, the first conventional nitrogen sealing device is also connected to a first conventional nitrogen making system, and a first conventional nitrogen sealing device inlet isolation valve is arranged between the first conventional nitrogen sealing device and the first conventional nitrogen making system;
the second conventional nitrogen sealing device is connected to the low-temperature heat storage medium tank, the second conventional nitrogen sealing device is also connected to a second conventional nitrogen making system, and a second conventional nitrogen sealing device inlet isolation valve is arranged between the second conventional nitrogen sealing device and the second conventional nitrogen making system;
the first-stage air expander, the second-stage air expander, the third-stage air expander and the fourth-stage air expander are respectively connected to the isolation wind inlet isolation main valves of the air expanders of all stages, and the isolation wind inlet isolation main valves of the air expanders of all stages are connected with a third conventional nitrogen production system;
the first stage air compressor is connected to the first stage air receiver via a first stage air receiver inlet isolation valve; the first-stage air storage chamber is connected to the first-stage interstage reheater through a first-stage air storage chamber outlet isolation valve and a first-stage air storage chamber outlet adjusting valve which are sequentially connected; the first-stage interstage reheater is connected to the first-stage air expander through a first-stage air expander inlet cut-off valve and a first-stage air expander inlet adjusting valve which are connected in sequence;
The first-stage inter-stage reheater is further connected to the heat storage medium subsystem through a first-stage inter-stage reheater heat storage medium side inlet adjusting valve and a first-stage inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence;
the first-stage air expander is connected with a silencer, a first-stage air expander bypass adjusting valve is arranged between the first-stage inter-stage reheater and the first-stage inter-stage reheater heat storage medium side inlet adjusting valve, and the first-stage air expander bypass adjusting valve is connected to the silencer corresponding to the first-stage air expander;
the second stage air compressor is connected to the second stage air reservoir via a second stage air reservoir inlet isolation valve; the second-stage air storage chamber is connected to the second-stage inter-stage reheater through a second-stage air storage chamber outlet isolation valve and a second-stage air storage chamber outlet adjusting valve which are sequentially connected; the second-stage inter-stage reheater is connected to a second-stage air expander through a second-stage air expander inlet cutoff valve and a second-stage air expander inlet adjusting valve which are connected in sequence;
the second-stage inter-stage reheater is further connected to the heat storage medium subsystem through a second-stage inter-stage reheater heat storage medium side inlet adjusting valve and a second-stage inter-stage reheater heat storage medium side inlet isolation valve which are sequentially connected;
The second-stage air expander is connected with a silencer, a second-stage air expander bypass adjusting valve is arranged between the second-stage inter-stage reheater and the second-stage inter-stage reheater heat storage medium side inlet adjusting valve, and the second-stage air expander bypass adjusting valve is connected to the silencer corresponding to the second-stage air expander;
the third stage air compressor is connected to the third stage air reservoir via a third stage air reservoir inlet isolation valve; the third-stage air storage chamber is connected to the third-stage interstage reheater through a third-stage air storage chamber outlet isolation valve and a third-stage air storage chamber outlet adjusting valve which are sequentially connected; the third-stage interstage reheater is connected to a third-stage air expansion machine through a third-stage air expansion machine inlet cut-off valve and a third-stage air expansion machine inlet adjusting valve which are connected in sequence;
the third-stage inter-stage reheater is also connected to the heat storage medium subsystem through a third-stage inter-stage reheater heat storage medium side inlet adjusting valve and a third-stage inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence;
the third-stage air expander is connected with a silencer, a third-stage air expander bypass adjusting valve is arranged between the third-stage interstage reheater and the third-stage interstage reheater heat storage medium side inlet adjusting valve, and the third-stage air expander bypass adjusting valve is connected to the silencer corresponding to the third-stage air expander;
Said fourth stage air compressor connected to said fourth stage air reservoir via a fourth stage air reservoir inlet isolation valve; the fourth air storage chamber is connected to the fourth interstage reheater through a fourth air storage chamber outlet isolation valve and a fourth air storage chamber outlet adjusting valve which are connected in sequence; the fourth-stage interstage reheater is connected to the fourth-stage air expander through a fourth-stage air expander inlet cutoff valve and a fourth-stage air expander inlet adjusting valve which are connected in sequence;
the fourth-stage inter-stage reheater is further connected to the heat storage medium subsystem through a fourth-stage inter-stage reheater heat storage medium side inlet adjusting valve and a fourth-stage inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence;
the fourth-stage air expander is connected with a silencer, and a fourth-stage air expander bypass adjusting valve is arranged between the fourth-stage inter-stage reheater and the heat storage medium side inlet adjusting valve of the fourth-stage inter-stage reheater and connected to the silencer corresponding to the fourth-stage air expander;
the expansion power generation system for the compressed air energy storage power station further comprises: the first stage air expander isolation air inlet isolation valve, the second stage air expander isolation air inlet isolation valve, the third stage air expander isolation air inlet isolation valve and the fourth stage air expander isolation air inlet isolation valve are respectively connected with the isolation air inlet isolation main valve of each stage of air expander in parallel;
The first stage air expander isolation wind inlet isolation valve is connected to a conduit between the first clutch and the first stage air expander;
the second stage air expander isolation wind inlet isolation valve is connected to a conduit between the first clutch and the second stage air expander;
the third stage air expander isolation wind inlet isolation valve is connected to a conduit between the third clutch and the third stage air expander;
the fourth stage air expander isolation wind inlet isolation valve is connected to the conduit between the third clutch and the fourth stage air expander;
the expansion power generation system for the compressed air energy storage power station further comprises: the heat storage medium side outlet isolation valve of the first-stage interstage reheater, the heat storage medium side outlet isolation valve of the second-stage interstage reheater, the heat storage medium side outlet isolation valve of the third-stage interstage reheater and the heat storage medium side outlet isolation valve of the fourth-stage interstage reheater are connected in parallel;
the first-stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the first-stage inter-stage reheater;
the second-stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the second-stage inter-stage reheater;
The third stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the third stage inter-stage reheater;
the fourth inter-stage reheater heat storage medium side outlet isolation valve is connected with the fourth inter-stage reheater;
a first high-temperature heat storage medium pump inlet isolating valve is arranged between the first high-temperature heat storage medium pump and the high-temperature heat storage medium tank, and a second high-temperature heat storage medium pump inlet isolating valve is arranged between the second high-temperature heat storage medium pump and the high-temperature heat storage medium tank;
the first high-temperature heat storage medium pump is connected to the inlet sides of the first stage inter-stage reheater, the second stage inter-stage reheater, the third stage inter-stage reheater and the fourth stage inter-stage reheater through a first high-temperature heat storage medium pump outlet isolation valve;
the second high-temperature heat storage medium pump is connected to the inlet sides of the first-stage inter-stage reheater, the second-stage inter-stage reheater, the third-stage inter-stage reheater and the fourth-stage inter-stage reheater through a second high-temperature heat storage medium pump outlet isolation valve;
and a high-temperature heat storage medium pump recirculation regulating valve and a high-temperature heat storage medium pump recirculation isolating valve are sequentially connected between the high-temperature heat storage medium tank and the first high-temperature heat storage medium pump outlet isolating valve.
2. An expansion power generation system for a compressed air energy storage power plant according to claim 1 wherein the first stage air expander is connected to one end of a gearbox reducer and the other end of the gearbox reducer is connected to a generator.
3. An expansion power generation system for a compressed air energy storage power plant according to claim 1 further comprising: a conventional lubricating oil system;
the conventional lubricating oil system is used for providing lubricating and cooling oil for the first-stage air expander, the second-stage air expander, the third-stage air expander, the fourth-stage air expander, the first clutch, the second clutch, the third clutch and the gearbox reducer.
4. The expansion power generation system for a compressed air energy storage power plant of claim 3 wherein the conventional lubricating oil system comprises: the lubricating oil tank comprises a lubricating oil tank, a first alternating-current lubricating oil pump, a second alternating-current lubricating oil pump, a direct-current accident oil pump and an oil tank electric heater, wherein the first alternating-current lubricating oil pump, the second alternating-current lubricating oil pump and the direct-current accident oil pump are respectively arranged in the lubricating oil tank;
the first alternating-current lubricating oil pump, the second alternating-current lubricating oil pump and the direct-current accident oil pump are connected to a first-stage air expander, a second-stage air expander, a third-stage air expander, a fourth-stage air expander, a first clutch, a second clutch, a third clutch and a gear box reducer.
5. The expansion power generation system for a compressed air energy storage power plant of claim 4 wherein the conventional lubricating oil system further comprises: the lubricating oil purifying device is connected with the lubricating oil tank and used for purifying lubricating oil in the lubricating oil tank, and the first oil fume exhaust fan and the second oil fume exhaust fan are respectively connected with the lubricating oil tank;
the conventional lubricating oil system further comprises: the lubricating oil filter, the lubricating oil cooler and the energy accumulator are respectively connected with the lubricating oil tank;
the lubricating oil filter is connected with the lubricating oil cooler, and the lubricating oil cooler is respectively connected to the first-stage air expander, the second-stage air expander, the third-stage air expander, the fourth-stage air expander, the first clutch, the second clutch, the third clutch and the gearbox reducer through a lubricating oil pressure regulating valve;
the lubricating oil pressure regulating valve, the lubricating oil tank and the lubricating oil cooler are all connected to a lubricating oil temperature regulating valve.
6. An expansion power generation system for a compressed air energy storage power plant of claim 5 further comprising: a conventional factory cooling water system;
The conventional factory cooling water system is respectively connected with the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump;
a first lubricating oil cooling water inlet isolating valve is arranged on a connecting pipeline between the conventional factory cooling water system and a first cooling water inlet of the lubricating oil cooler, and a first lubricating oil cooling water outlet isolating valve is arranged on a connecting pipeline between the conventional factory cooling water system and a first cooling water outlet of the lubricating oil cooler;
and a second lubricating oil cooling water inlet isolating valve is arranged on a connecting pipeline between the conventional factory cooling water system and a second cooling water inlet of the lubricating oil cooler, and a second lubricating oil cooling water outlet isolating valve is arranged on a connecting pipeline between the conventional factory cooling water system and a second cooling water outlet of the lubricating oil cooler.
7. An expansion power generation system for a compressed air energy storage power plant according to claim 1 further comprising: the first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are connected in parallel;
The first stage air expander seal wind inlet isolation valve is connected to a conduit between the first clutch and the first stage air expander;
the second stage air expander seal wind inlet isolation valve is connected to a conduit between the first clutch and the second stage air expander;
the third stage air expander seal wind inlet isolation valve is connected to a conduit between the third clutch and the third stage air expander;
the fourth stage air expander seal wind inlet isolation valve is connected to a conduit between the third clutch and the fourth stage air expander.
8. An expansion power generation system for a compressed air energy storage power plant according to claim 1 further comprising: the first-stage air storage chamber air supply expander sealing air outlet isolation valve, the second-stage air storage chamber air supply expander sealing air outlet isolation valve, the third-stage air storage chamber air supply expander sealing air outlet isolation valve and the fourth-stage air storage chamber air supply expander sealing air outlet isolation valve are connected in parallel;
the first-stage air storage chamber is connected with the air expander sealing air outlet isolation valve;
the second-stage air storage chamber is used for connecting the air expander sealing air outlet isolation valve with the second-stage air storage chamber;
The third-stage air storage chamber is used for connecting the air expander sealing air outlet isolation valve with the third-stage air storage chamber;
and the fourth-stage air storage chamber is connected with the air expander sealing air outlet isolation valve.
9. The expansion power generation system for a compressed air energy storage power plant of claim 6, wherein a first high temperature heat storage medium pump cooling water inlet isolation valve is connected between the conventional plant cooling water system and the inlet side of the first high temperature heat storage medium pump, and a second high temperature heat storage medium pump cooling water inlet isolation valve is connected between the conventional plant cooling water system and the inlet side of the second high temperature heat storage medium pump;
and a first high-temperature heat storage medium pump cooling water outlet isolation valve is connected between the conventional factory cooling water system and the outlet side of the first high-temperature heat storage medium pump, and a second high-temperature heat storage medium pump cooling water outlet isolation valve is connected between the conventional factory cooling water system and the outlet side of the second high-temperature heat storage medium pump.
10. An operation control method of an expansion power generation system for a compressed air energy storage power plant according to any one of claims 1 to 9, the operation control method comprising:
If it is determined that the inter-stage reheating type air expansion generator set and the heat storage medium subsystem operate normally, performing starting pretreatment on the heat storage medium subsystem and the inter-stage reheating type air expansion generator set;
selecting at least one corresponding interstage reheating type air expansion generator set as a current target control object according to a target operation condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that the single current control object meets a starting condition of the interstage reheating type air expansion generator set;
wherein the start-up control process of the expansion power generation of the target control object includes: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; and controlling the target control object to execute a grid connection and initial load warming process, and controlling the target control object degree load to continuously increase to a rated load so as to complete the starting process of the expansion power generation corresponding to the target control object.
11. The expansion power generation system operation control method according to claim 10, wherein the air compressor in the compressed air energy storage power plant comprises: a first stage air compressor, a second stage air compressor, a third stage air compressor and a fourth stage air compressor; correspondingly, the interstage reheated air expansion generator set comprises: the system comprises a first inter-stage reheating type air expansion generator set, a second inter-stage reheating type air expansion generator set, a third inter-stage reheating type air expansion generator set and a fourth inter-stage reheating type air expansion generator set; the first interstage reheat air expansion genset includes: a first stage air expander connected to the first stage air compressor via a first stage inter-stage reheater and a first stage air receiver connected in series; the second interstage reheat air expansion genset includes: a second stage air expander connected to the second stage air compressor via a second stage inter-stage reheater and a second stage air receiver connected in series; the inter-third stage reheat air expansion generator set includes: a third stage air expander connected to the third stage air compressor via a third stage interstage reheater and a third stage air receiver connected in series; the fourth interstage reheat air expansion generator set includes: a fourth stage air expander connected to the fourth stage air compressor via a fourth stage inter-stage reheater and a fourth stage air receiver connected in series; the first-stage air expander, the second-stage air expander, the third-stage air expander and the fourth-stage air expander are connected in sequence; a first clutch is arranged between the first-stage air expander and the second-stage air expander; a second clutch is arranged between the second-stage air expander and the third-stage air expander; a third clutch is arranged between the third-stage air expander and the fourth-stage air expander; the first-stage air expander is connected with one end of a gear box reducer, and the other end of the gear box reducer is connected to a generator; the heat storage medium subsystem comprises a first high-temperature heat storage medium pump, a second high-temperature heat storage medium pump, a high-temperature heat storage medium tank and a low-temperature heat storage medium tank; the expansion power generation system further includes: a conventional lubricating oil system and a conventional service cooling water system; the conventional lubricating oil system includes: the lubricating oil system comprises a lubricating oil tank, a first alternating-current lubricating oil pump, a second alternating-current lubricating oil pump, a direct-current emergency oil pump and an oil tank electric heater, wherein the first alternating-current lubricating oil pump, the second alternating-current lubricating oil pump and the direct-current emergency oil pump are respectively arranged in the lubricating oil tank; the conventional lubricating oil system further includes: the lubricating oil purifying device is connected with the lubricating oil tank and used for purifying lubricating oil in the lubricating oil tank, and the first oil fume exhaust fan and the second oil fume exhaust fan are respectively connected with the lubricating oil tank; the conventional lubricating oil system further comprises: the lubricating oil filter, the lubricating oil cooler and the energy accumulator are respectively connected with the lubricating oil tank; the lubricating oil filter is connected with the lubricating oil cooler, and the lubricating oil cooler is respectively connected to the first-stage air expander, the second-stage air expander, the third-stage air expander, the fourth-stage air expander, the first clutch, the second clutch, the third clutch and the gearbox reducer through a lubricating oil pressure regulating valve; the lubricating oil pressure regulating valve, the lubricating oil tank and the lubricating oil cooler are all connected to a lubricating oil temperature regulating valve; the conventional factory cooling water system is respectively connected with the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump; a first lubricating oil cooling water inlet isolating valve is arranged on a connecting pipeline between the conventional factory cooling water system and a first cooling water inlet of the lubricating oil cooler, and a first lubricating oil cooling water outlet isolating valve is arranged on a connecting pipeline between the conventional factory cooling water system and a first cooling water outlet of the lubricating oil cooler; a second lubricating oil cooling water inlet isolation valve is arranged on a connecting pipeline between the conventional plant cooling water system and a second cooling water inlet of the lubricating oil cooler, and a second lubricating oil cooling water outlet isolation valve is arranged on a connecting pipeline between the conventional plant cooling water system and a second cooling water outlet of the lubricating oil cooler;
The first stage air compressor is connected to the first stage air receiver via a first stage air receiver inlet isolation valve; the first-stage air storage chamber is connected to the first-stage inter-stage reheater through a first-stage air storage chamber outlet isolation valve and a first-stage air storage chamber outlet adjusting valve which are sequentially connected; the first-stage inter-stage reheater is connected to the first-stage air expander through a first-stage air expander inlet cut-off valve and a first-stage air expander inlet adjusting valve which are connected in sequence; the first-stage inter-stage reheater is further connected to the heat storage medium subsystem through a first-stage inter-stage reheater heat storage medium side inlet adjusting valve and a first-stage inter-stage reheater heat storage medium side inlet isolation valve which are sequentially connected; the first-stage air expander is connected with a silencer, and a first-stage air expander bypass adjusting valve is arranged between the first-stage inter-stage reheater and the first-stage inter-stage reheater heat storage medium side inlet adjusting valve and is connected to the silencer corresponding to the first-stage air expander; the second stage air compressor is connected to the second stage air reservoir via a second stage air reservoir inlet isolation valve; the second-stage air storage chamber is connected to the second-stage inter-stage reheater through a second-stage air storage chamber outlet isolation valve and a second-stage air storage chamber outlet adjusting valve which are sequentially connected; the second-stage interstage reheater is connected to the second-stage air expander through a second-stage air expander inlet cutoff valve and a second-stage air expander inlet adjusting valve which are connected in sequence; the second-stage inter-stage reheater is further connected to the heat storage medium subsystem via a second-stage inter-stage reheater heat storage medium side inlet adjusting valve and a second-stage inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence; the second-stage air expander is connected with a silencer, and a second-stage air expander bypass adjusting valve is arranged between the second-stage inter-stage reheater and the second-stage inter-stage reheater heat storage medium side inlet adjusting valve and is connected to the silencer corresponding to the second-stage air expander; the third stage air compressor is connected to the third stage reservoir via a third stage reservoir inlet isolation valve; the third-stage air storage chamber is connected to the third-stage interstage reheater through a third-stage air storage chamber outlet isolation valve and a third-stage air storage chamber outlet adjusting valve which are sequentially connected; the third-stage interstage reheater is connected to a third-stage air expansion machine through a third-stage air expansion machine inlet cut-off valve and a third-stage air expansion machine inlet adjusting valve which are connected in sequence; the third-stage inter-stage reheater is further connected to the heat storage medium subsystem through a third-stage inter-stage reheater heat storage medium side inlet adjusting valve and a third-stage inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence; the third-stage air expander is connected with a silencer, and a third-stage air expander bypass adjusting valve is arranged between the third-stage interstage reheater and the third-stage interstage reheater heat storage medium side inlet adjusting valve and connected to the silencer corresponding to the third-stage air expander; said fourth stage air compressor connected to said fourth stage air reservoir via a fourth stage air reservoir inlet isolation valve; the fourth air storage chamber is connected to the fourth interstage reheater through a fourth air storage chamber outlet isolation valve and a fourth air storage chamber outlet adjusting valve which are connected in sequence; the fourth-stage interstage reheater is connected to the fourth-stage air expander through a fourth-stage air expander inlet cutoff valve and a fourth-stage air expander inlet adjusting valve which are connected in sequence; the fourth inter-stage reheater is further connected to the heat storage medium subsystem via a fourth inter-stage reheater heat storage medium side inlet trim valve and a fourth inter-stage reheater heat storage medium side inlet isolation valve which are connected in sequence; the fourth-stage air expander is connected with a silencer, and a fourth-stage air expander bypass adjusting valve is arranged between the fourth-stage inter-stage reheater and the heat storage medium side inlet adjusting valve of the fourth-stage inter-stage reheater and connected to the silencer corresponding to the fourth-stage air expander; the expansion power generation system for a compressed air energy storage power station further comprises: the first stage air expander isolation air inlet isolation valve, the second stage air expander isolation air inlet isolation valve, the third stage air expander isolation air inlet isolation valve and the fourth stage air expander isolation air inlet isolation valve are respectively connected with the isolation air inlet isolation main valve of each stage of air expander in parallel; the first stage air expander isolation wind inlet isolation valve is connected to a conduit between the first clutch and the first stage air expander; the second stage air expander isolation wind inlet isolation valve is connected to a conduit between the first clutch and the second stage air expander; the third stage air expander isolation wind inlet isolation valve is connected to a conduit between the third clutch and the third stage air expander; the fourth stage air expander isolation wind inlet isolation valve is connected to the conduit between the third clutch and the fourth stage air expander; the expansion power generation system for a compressed air energy storage power station further comprises: the first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are connected in parallel; the first stage air expander seal wind inlet isolation valve is connected to a conduit between the first clutch and the first stage air expander; the second stage air expander seal air inlet isolation valve is connected to the conduit between the first clutch and the second stage air expander; the third stage air expander seal air inlet isolation valve is connected to a conduit between the third clutch and the third stage air expander; the fourth stage air expander seal wind inlet isolation valve is connected to the conduit between the third clutch and the fourth stage air expander; the expansion power generation system for a compressed air energy storage power station further comprises: the first-stage air storage chamber air supply expander sealing air outlet isolation valve, the second-stage air storage chamber air supply expander sealing air outlet isolation valve, the third-stage air storage chamber air supply expander sealing air outlet isolation valve and the fourth-stage air storage chamber air supply expander sealing air outlet isolation valve are connected in parallel; the first-stage air storage chamber is connected with the air expander sealing air outlet isolation valve; the second-stage air storage chamber is used for connecting the air outlet isolating valve of the air expansion machine with the second-stage air storage chamber; the third-stage air storage chamber is used for connecting the air expander sealing air outlet isolation valve with the third-stage air storage chamber; the fourth-stage air storage chamber is used for connecting the air expander sealing air outlet isolation valve with the fourth-stage air storage chamber; the expansion power generation system for a compressed air energy storage power station further comprises: a first-stage inter-stage reheater heat storage medium side outlet isolation valve, a second-stage inter-stage reheater heat storage medium side outlet isolation valve, a third-stage inter-stage reheater heat storage medium side outlet isolation valve and a fourth-stage inter-stage reheater heat storage medium side outlet isolation valve are connected in parallel; the first stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the first stage inter-stage reheater; the second-stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the second-stage inter-stage reheater; the third stage inter-stage reheater heat storage medium side outlet isolation valve is connected with the third stage inter-stage reheater; the fourth inter-stage reheater heat storage medium side outlet isolation valve is connected with the fourth inter-stage reheater; a first high-temperature heat storage medium pump inlet isolation valve is arranged between the first high-temperature heat storage medium pump and the high-temperature heat storage medium tank, and a second high-temperature heat storage medium pump inlet isolation valve is arranged between the second high-temperature heat storage medium pump and the high-temperature heat storage medium tank; the first high-temperature heat storage medium pump is connected to the inlet sides of the first stage inter-stage reheater, the second stage inter-stage reheater, the third stage inter-stage reheater and the fourth stage inter-stage reheater through a first high-temperature heat storage medium pump outlet isolation valve; the second high-temperature heat storage medium pump is connected to the inlet sides of the first-stage inter-stage reheater, the second-stage inter-stage reheater, the third-stage inter-stage reheater and the fourth-stage inter-stage reheater through a second high-temperature heat storage medium pump outlet isolation valve; a high-temperature heat storage medium pump recirculation regulating valve and a high-temperature heat storage medium pump recirculation isolating valve are sequentially connected between the high-temperature heat storage medium tank and the first high-temperature heat storage medium pump outlet isolating valve; a first high-temperature heat storage medium pump cooling water inlet isolation valve is connected between the conventional plant cooling water system and the inlet side of the first high-temperature heat storage medium pump, and a second high-temperature heat storage medium pump cooling water inlet isolation valve is connected between the conventional plant cooling water system and the inlet side of the second high-temperature heat storage medium pump; and a first high-temperature heat storage medium pump cooling water outlet isolation valve is connected between the conventional factory cooling water system and the outlet side of the first high-temperature heat storage medium pump, and a second high-temperature heat storage medium pump cooling water outlet isolation valve is connected between the conventional factory cooling water system and the outlet side of the second high-temperature heat storage medium pump.
12. The method of controlling the operation of an expansion power generation system of claim 11, further comprising, prior to the pre-conditioning the heat storage medium subsystem and the inter-stage reheat air expansion generator set for startup:
step 101, judging whether the current state of the expansion power generation system completely meets all conditions in a first condition group, and if not, executing step 102;
wherein each condition in the first set of conditions comprises:
1) The first stage air compressor, the second stage air compressor, the third stage air compressor and the fourth stage air compressor are shut down;
2) The first stage air storage chamber outlet regulating valve, the second stage air storage chamber outlet regulating valve, the third stage air storage chamber outlet regulating valve, the fourth stage air storage chamber outlet regulating valve, the first stage air expander sealing air inlet isolating valve, the second stage air expander sealing air inlet isolating valve, the third stage air expander sealing air inlet isolating valve, the fourth stage air expander sealing air inlet isolating valve, the first stage air storage chamber inlet isolating valve, the second stage air storage chamber inlet isolating valve, the third stage air storage chamber inlet isolating valve, the fourth stage air storage chamber inlet isolating valve, the first stage air storage chamber outlet isolating valve, the second stage air storage chamber outlet isolating valve, the third stage air storage chamber outlet isolating valve, the fourth stage air storage chamber outlet isolating valve, the first stage air storage chamber air expander sealing air outlet isolating valve, the second stage air storage chamber air expander sealing air outlet isolating valve, the third stage air storage chamber air expander sealing air outlet isolating valve and the fourth stage air storage chamber air expander sealing air outlet isolating valve are all in a closed state;
3) The pressure of the first-stage gas storage chamber, the pressure of the second-stage gas storage chamber, the pressure of the third-stage gas storage chamber, the pressure of the fourth-stage gas storage chamber, the gas storage temperature of the first-stage gas storage chamber, the gas storage temperature of the second-stage gas storage chamber, the gas storage temperature of the third-stage gas storage chamber and the gas storage temperature of the fourth-stage gas storage chamber all meet the requirements of respective corresponding preset normal states;
4) The liquid level of the lubricating oil tank meets the corresponding preset normal state requirement;
5) The air supply pressure of the conventional nitrogen making system meets the corresponding preset normal state requirement;
6) The main isolating valve of the isolating air inlet of each stage of air expander, the isolating valve of the isolating air inlet of the first stage of air expander, the isolating valve of the isolating air inlet of the second stage of air expander, the isolating valve of the isolating air inlet of the third stage of air expander and the isolating valve of the isolating air inlet of the fourth stage of air expander are all in an open state;
7) The first conventional nitrogen sealing device inlet isolation valve and the second conventional nitrogen sealing device inlet isolation valve are both in an open state;
8) The air supply pressure of the isolated air of the first-stage air expander, the air supply pressure of the isolated air of the second-stage air expander, the air supply pressure of the isolated air of the third-stage air expander and the air supply pressure of the isolated air of the fourth-stage air expander all meet the corresponding preset normal state requirements;
9) The liquid level of the high-temperature heat storage medium tank, the liquid level of the low-temperature heat storage medium tank, the pressure of the high-temperature heat storage medium tank and the pressure of the low-temperature heat storage medium tank meet the corresponding preset normal state requirements;
10 The water supply pressure and the water supply temperature of the conventional factory cooling water system meet the corresponding preset normal state requirements;
11 A first lubricating oil cooling water inlet isolation valve, a second lubricating oil cooling water inlet isolation valve, a first lubricating oil cooling water outlet isolation valve, a second lubricating oil cooling water outlet isolation valve, a first high-temperature heat storage medium pump cooling water inlet isolation valve, a first high-temperature heat storage medium pump cooling water outlet isolation valve, a second high-temperature heat storage medium pump cooling water inlet isolation valve and a second high-temperature heat storage medium pump cooling water outlet isolation valve are all in an open state;
102, sending out an instruction for stopping the operation of the first-stage air compressor, the second-stage air compressor, the third-stage air compressor and the fourth-stage air compressor, sending out an instruction for fully closing the first-stage air storage chamber outlet regulating valve, the second-stage air storage chamber outlet regulating valve, the third-stage air storage chamber outlet regulating valve and the fourth-stage air storage chamber outlet regulating valve, sending out an instruction for fully closing the first-stage air expander sealing air inlet isolating valve, the second-stage air expander sealing air inlet isolating valve, the third-stage air expander sealing air inlet isolating valve and the fourth-stage air expander sealing air inlet isolating valve, sending out an instruction for fully closing the first-stage air storage chamber inlet isolating valve, the second-stage air storage chamber inlet isolating valve, the third-stage air storage chamber inlet isolating valve and the fourth-stage air storage chamber inlet isolating valve, and sending out an instruction for fully closing the first-stage air storage chamber outlet isolating valve, the second-stage air storage chamber outlet isolating valve, the third-stage air storage chamber outlet isolating valve and the fourth-stage air storage chamber outlet isolating valve, sending an instruction for fully closing a first-stage air storage chamber air expander sealing air outlet isolation valve, a second-stage air storage chamber air expander sealing air outlet isolation valve, a third-stage air storage chamber air expander sealing air outlet isolation valve and a fourth-stage air storage chamber air expander sealing air outlet isolation valve, sending an instruction for opening all stages of air expander isolation air inlet isolation main valves, sending an instruction for fully opening a first-stage air expander isolation air inlet isolation valve, a second-stage air expander isolation air inlet isolation valve, a third-stage air expander isolation air inlet isolation valve and a fourth-stage air expander isolation air inlet isolation valve, sending an instruction for fully opening a first conventional nitrogen sealing device inlet isolation valve and a second conventional nitrogen sealing device inlet isolation valve, and sending an instruction for fully opening a first lubricating oil cooling water cooling oil inlet isolation valve and a second lubricating oil cooling water inlet isolation valve The method comprises the steps of starting an instruction of fully opening a first lubricating oil cooling water outlet isolation valve and a second lubricating oil cooling water outlet isolation valve, starting an instruction of fully opening a first high-temperature heat storage medium pump cooling water inlet isolation valve and a first high-temperature heat storage medium pump cooling water outlet isolation valve, starting an instruction of fully opening a second high-temperature heat storage medium pump cooling water inlet isolation valve and a second high-temperature heat storage medium pump cooling water outlet isolation valve, and waiting for the values of all state data in a first state data set to accord with respective corresponding preset normal values;
Wherein the first state data set comprises: the system comprises a first-stage gas storage chamber pressure, a second-stage gas storage chamber pressure, a third-stage gas storage chamber pressure, a fourth-stage gas storage chamber pressure, a first-stage gas storage chamber gas storage temperature, a second-stage gas storage chamber gas storage temperature, a third-stage gas storage chamber gas storage temperature, a fourth-stage gas storage chamber gas storage temperature, a lubricating oil tank liquid level, a conventional nitrogen production system gas supply pressure, a first-stage air expander isolated wind gas supply pressure, a second-stage air expander isolated wind gas supply pressure, a third-stage air expander isolated wind gas supply pressure, a fourth-stage air expander isolated wind gas supply pressure, a high-temperature heat storage medium tank liquid level, a low-temperature heat storage medium tank liquid level, a high-temperature heat storage medium tank pressure, a low-temperature heat storage medium tank pressure, a conventional plant cooling water system water supply pressure and a conventional plant cooling water supply temperature.
13. The method of controlling the operation of an expansion power generation system of claim 12, further comprising, prior to the pre-conditioning the heat storage medium subsystem and the inter-stage reheat air expansion generator set for startup:
if the current state of the expansion power generation system completely meets all the conditions in the first condition group through the step 101, executing a step 103;
103, judging whether the current state of the alternating-current lubricating oil pump completely meets all conditions in the second condition group, if not, executing step 104, and if so, executing step 105;
wherein each condition in the second condition group includes:
1) The first oil smoke exhaust fan or the second oil smoke exhaust fan is started;
2) The temperature of the oil tank electric heater which is put into the lubricating oil tank is automatically controlled;
3) The lubricating oil purification device is started;
104, sending an instruction for starting the first oil fume exhaust fan or the second oil fume exhaust fan, sending an instruction for automatically controlling the temperature of the oil tank electric heater in the lubricating oil tank, and sending an instruction for starting the lubricating oil purification device;
105, judging whether the un-started fume exhaust fan is put into the startup standby fan interlocking, if not, executing 106;
and step 106, sending an instruction of putting the un-started lampblack exhaust fan into the interlocking of the started standby fan.
14. The method of controlling the operation of an expansion power generation system of claim 13, further comprising, prior to the pre-conditioning the heat storage medium subsystem and the inter-stage reheat air expansion generator set for startup:
if the situation that the oil fume exhaust fan which is not started is put into the starting standby fan interlocking mode is judged in the step 105, the step 107 is executed;
Step 107, judging whether at least one of the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump is started, if not, executing step 108; if yes, go to step 109;
108, sending a command for starting the first alternating-current lubricating oil pump or the second alternating-current lubricating oil pump;
step 109, judging whether the un-started alternating-current lubricating oil pump and the direct-current accident oil pump are both put into the starting standby pump interlocking, if not, executing step 110, and if so, executing step 111;
step 110, sending an instruction that the AC lubricating oil pump is not started and the DC accident oil pump is put into operation to start the backup pump interlock;
step 111, judging whether the current state of the lubricating oil pressure regulating valve completely meets all conditions in the third condition group, if not, executing step 112;
wherein each condition in the third condition group includes:
1) The pressure of the lubricating oil fed into the lubricating oil pressure regulating valve is automatically controlled;
2) The temperature of the fed lubricating oil is automatically controlled by the lubricating oil temperature regulating valve;
and step 112, sending an instruction for automatically controlling the input lubricating oil supply pressure of the lubricating oil pressure regulating valve and sending an instruction for automatically controlling the input lubricating oil supply temperature of the lubricating oil temperature regulating valve.
15. The method of controlling the operation of an expansion power generation system of claim 14, wherein the pre-conditioning the heat storage medium subsystem and the inter-stage reheat air expansion generator set for startup comprises:
if the judgment in step 111 indicates that the current state of the lubricating oil pressure regulating valve completely meets all the conditions in the third component group, step 113 is executed;
step 113, judging whether the current state of the high-temperature heat storage medium pump completely meets all conditions in the fourth set, if not, executing step 114, and if so, executing step 115;
wherein each condition in the fourth condition group includes:
1) The first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve are opened to a first preset opening degree;
2) The first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve are both in an open state;
3) The high-temperature heat storage medium pump recirculation isolation valve and the high-temperature heat storage medium pump recirculation regulating valve are both in an open state;
4) The first-stage interstage reheater heat storage medium side inlet isolation valve, the second-stage interstage reheater heat storage medium side inlet isolation valve, the third-stage interstage reheater heat storage medium side inlet isolation valve and the fourth-stage interstage reheater heat storage medium side inlet isolation valve are all in an open state;
5) The first-stage interstage reheater heat storage medium side inlet adjusting valve, the second-stage interstage reheater heat storage medium side inlet adjusting valve, the third-stage interstage reheater heat storage medium side inlet adjusting valve and the fourth-stage interstage reheater heat storage medium side inlet adjusting valve are all in an open state;
6) The first-stage interstage reheater heat storage medium side outlet isolation valve, the second-stage interstage reheater heat storage medium side outlet isolation valve, the third-stage interstage reheater heat storage medium side outlet isolation valve and the fourth-stage interstage reheater heat storage medium side outlet isolation valve are all in an open state;
step 114, issuing an instruction to open the first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve to a first preset opening degree, issuing an instruction to fully open the first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve, issuing an instruction to fully open the high-temperature heat storage medium pump recirculation isolation valve and the high-temperature heat storage medium pump recirculation regulating valve, issuing an instruction to fully open the first-stage inter-stage reheater heat storage medium side inlet isolation valve, the second-stage inter-stage reheater heat storage medium side inlet isolation valve, the third-stage inter-stage reheater heat storage medium side inlet isolation valve and the fourth-stage reheater heat storage medium side inlet isolation valve, issuing an instruction to fully open the first-stage reheater heat storage medium side inlet regulating valve, the second-stage reheater heat storage medium side inlet regulating valve, the third-stage inter-stage reheater heat storage medium side inlet regulating valve and the fourth-stage reheater heat storage medium side inlet regulating valve, and issuing a fourth-stage reheater heat storage medium outlet regulating valve;
Step 115, judging whether the duration time of the current state of the high-temperature heat storage medium pump completely meeting all conditions in the fourth condition group is delayed for a first preset time or whether an instruction for manually confirming the emptying and preheating completion of the heat storage medium subsystem is received; if yes, go to step 116;
step 116, judging whether the current state of the high-temperature heat storage medium pump completely meets all conditions in a fifth condition group, and if not, executing step 117;
wherein each condition in the fifth condition group includes:
1) The first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve are both in an open state;
2) The first high-temperature heat storage medium pump outlet isolation valve and the second high-temperature heat storage medium pump outlet isolation valve are both in a closed state;
3) The system comprises a first-stage interstage reheater heat storage medium side inlet isolation valve, a second-stage interstage reheater heat storage medium side inlet isolation valve, a third-stage interstage reheater heat storage medium side inlet isolation valve, a fourth-stage interstage reheater heat storage medium side inlet isolation valve, a first-stage interstage reheater heat storage medium side inlet adjusting valve, a second-stage interstage reheater heat storage medium side inlet adjusting valve, a third-stage interstage reheater heat storage medium side inlet adjusting valve, a fourth-stage interstage reheater heat storage medium side inlet adjusting valve, a first-stage interstage reheater heat storage medium side outlet isolation valve, a second-stage interstage reheater heat storage medium side outlet isolation valve, a third-stage interstage reheater heat storage medium side outlet isolation valve and a fourth-stage reheater heat storage medium side outlet isolation valve, wherein the first-stage interstage reheater heat storage medium side inlet isolation valve, the second-stage reheater heat storage medium side outlet isolation valve and the fourth-stage reheater heat storage medium side outlet isolation valve are all in a closed state;
Step 117, issuing an instruction to fully open the first high temperature heat storage medium pump inlet isolation valve and the second high temperature heat storage medium pump inlet isolation valve, issuing an instruction to fully close the first high temperature heat storage medium pump outlet isolation valve and the second high temperature heat storage medium pump outlet isolation valve, issuing an instruction to fully close the first stage inter-stage reheater heat storage medium side inlet isolation valve, the second stage inter-stage reheater heat storage medium side inlet isolation valve, the third stage inter-stage reheater heat storage medium side inlet isolation valve and the fourth stage inter-stage reheater heat storage medium side inlet isolation valve, issuing an instruction to fully close the first stage inter-stage reheater heat storage medium side inlet adjustment valve, the second stage inter-stage reheater heat storage medium side inlet adjustment valve, the third stage reheater heat storage medium side inlet adjustment valve and the fourth stage inter-stage reheater heat storage medium side inlet adjustment valve, issuing an instruction to fully close the first stage inter-stage reheater heat storage medium side outlet isolation valve, the second stage reheater heat storage medium side outlet isolation valve and the fourth stage reheater heat storage medium side inlet adjustment valve.
16. The method of controlling the operation of an expansion power generation system of claim 15, wherein the pre-conditioning the heat storage medium subsystem and the inter-stage reheat air expansion genset for startup comprises:
If the judgment in step 116 indicates that the current state of the lubricating oil pressure regulating valve completely meets all the conditions in the fifth condition group, step 118 is executed;
step 118, judging whether the first high-temperature heat storage medium pump or the second high-temperature heat storage medium pump is started, if not, executing step 119; if yes, go to step 120;
step 119, issuing an instruction to start the first high-temperature heat storage medium pump or the second high-temperature heat storage medium pump 31;
step 120, judging whether the outlet isolation valves of the started high-temperature heat storage medium pump are all in an open state, if not, executing step 121; if yes, go to step 122;
step 121, sending an instruction of fully opening an outlet isolation valve of the started high-temperature heat storage medium pump;
step 122, judging whether the high-temperature heat storage medium pump which is not started is put into starting of the standby pump interlocking, if not, executing step 123; if yes, go to step 124;
step 123, sending an instruction of putting the high-temperature heat storage medium pump which is not started into starting the backup pump interlock;
step 124, judging whether the outlet isolation valves of the high-temperature heat storage medium pumps are all in an open state or not; if not, go to step 125; if yes, go to step 126;
step 125, sending an instruction of fully opening an outlet isolation valve of the high-temperature heat storage medium pump which is not started;
Step 126, judging whether the current state of the high-temperature heat storage medium pump completely meets all conditions in the sixth condition group, if not, executing step 127; if so, acquiring the current target operation condition of the compressed air energy storage power station;
wherein each condition in the sixth condition group includes:
1) The high-temperature heat storage medium pump recirculation regulating valve is used for automatically controlling the flow of the heat storage medium at the outlet of the first-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the second-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the third-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the fourth-stage inter-stage reheater and the recirculation flow of the high-temperature heat storage medium pump;
2) The pressure of the outlet of the high-temperature heat storage medium pump on the outlet pipeline of the started high-temperature heat storage medium pump frequency converter is automatically controlled;
and 127, sending an instruction for automatically controlling the flow of the heat storage medium thrown into the outlet of the first-stage inter-stage reheater by the high-temperature heat storage medium pump recirculation regulating valve, the flow of the heat storage medium at the outlet of the second-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the third-stage inter-stage reheater, the flow of the heat storage medium at the outlet of the fourth-stage inter-stage reheater and the recirculation flow of the high-temperature heat storage medium pump, and sending an instruction for automatically controlling the outlet pressure of the high-temperature heat storage medium pump thrown into the outlet pipeline of the high-temperature heat storage medium pump after starting the frequency converter of the high-temperature heat storage medium pump.
17. The operation control method of an expansion power generation system according to claim 16, wherein the selecting, according to the target operation condition, the corresponding at least one inter-stage reheat air expansion genset as the current target control object, and performing a start-up control process of expansion power generation for the target control object after determining that the single current control object satisfies the inter-stage reheat air expansion genset start-up condition, includes:
if the target operation condition is a first-stage operation condition, selecting a first inter-stage reheating type air expansion generator set as a current target control object;
if the current state of the high-temperature heat storage medium pump is judged to completely meet all the conditions in the sixth condition group through the step 126, executing a step A128;
step A128, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the seventh condition group, if not, executing step A129, and if so, executing step A130;
wherein each condition in the seventh condition group includes:
1) The first-stage air storage chamber is used for enabling the air expander to seal the air outlet isolation valves to be in an open state;
2) The sealing air inlet isolation valves of the first-stage air expander are all in an open state;
3) The second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are all in a closed state;
4) The first clutch has been placed in an unlocked state;
step A129, sending an instruction of fully opening a first-stage air storage chamber to seal an air outlet isolation valve of the air expansion machine, sending an instruction of fully opening a first-stage air expansion machine to seal an air inlet isolation valve, sending an instruction of fully closing a second-stage air expansion machine to seal an air inlet isolation valve, a third-stage air expansion machine to seal an air inlet isolation valve and a fourth-stage air expansion machine to seal an air inlet isolation valve, and sending an instruction of unlocking a first clutch;
step A130, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the eighth condition group, if not, executing step A131, and if so, executing step A133;
wherein each condition in the eighth condition group includes:
1) The air supply pressure of the sealing air of the first-stage air expander meets the corresponding preset normal state requirement;
2) The air supply pressure of the isolated air of the first-stage air expander meets the corresponding preset normal state requirement;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a first end bearing of the first-stage air expander and the temperature of a second end bearing of the first-stage air expander meet the corresponding preset normal state requirements;
5) The temperature of a bearing at the first end of the generator and the temperature of a bearing at the second end of the generator, and the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
6) The first-stage air expander first end bearing lubricating oil return temperature, the first-stage air expander second end bearing lubricating oil return temperature and the first clutch lubricating oil return temperature meet corresponding preset normal state requirements;
7) The temperature of the three-phase coil of the generator meets the corresponding preset normal state requirement;
8) The shaft vibration of the first end of the generator, the shaft vibration of the second end of the generator, the shaft vibration of the first end of the speed reducer of the gear box, the shaft vibration of the second end of the speed reducer of the gear box, the shaft vibration of the first end of the first stage air expander and the shaft vibration of the second end of the first stage air expander meet the corresponding requirements of a preset normal state;
9) The first stage air expander shaft displacement and the first clutch shaft displacement meet corresponding preset normal state requirements;
10 The misalignment amount of the first clutch shaft meets the corresponding preset normal state requirement;
step A131, judging whether an inlet shut-off valve and an inlet regulating valve of a first-stage air expander are both in a closed state; if not, go to step A132; if yes, executing step A133;
step A132, sending an instruction for fully closing the first-stage air expander inlet shut-off valve and the first-stage air expander inlet regulating valve;
step A133, judging whether the current state of the first inter-stage reheat air expansion generator set completely meets all conditions in the ninth condition group, if not, executing step A134, and if so, executing step A135;
wherein each condition in the ninth condition group includes:
1) The outlet regulating valve of the first-stage air storage chamber is automatically controlled by the air pressure of the outlet of the first-stage interstage reheater;
2) The bypass adjusting valve of the first-stage air expander is opened to a second preset opening degree;
3) The first-stage interstage reheater heat storage medium side inlet isolation valve and the first-stage interstage reheater heat storage medium side outlet isolation valve are both in an open state;
4) A first-stage inter-stage reheater heat storage medium side inlet adjusting valve is used for automatically controlling the temperature of outlet air of the first-stage inter-stage reheater;
step A134, sending an instruction of automatically controlling the air pressure of an outlet of a first-stage air storage chamber when an outlet regulating valve is thrown into a first-stage inter-stage reheater, sending an instruction of opening a bypass regulating valve of a first-stage air expander to a second preset opening degree, sending an instruction of fully opening a heat storage medium side inlet isolation valve of the first-stage inter-stage reheater and a heat storage medium side outlet isolation valve of the first-stage inter-stage reheater, and sending an instruction of automatically controlling the air temperature of an outlet of the first-stage inter-stage reheater when the heat storage medium side inlet regulating valve of the first-stage inter-stage reheater is thrown into the first-stage inter-stage reheater;
step A135, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the tenth condition group, if not, executing step A136, and if so, executing step A137;
wherein each condition in the tenth condition group includes:
1) The outlet isolation valves of the first-stage air storage chamber are all in an open state;
2) The inlet cut-off valves of the first-stage air expander are all in an open state;
3) The outlet air pressure and the outlet air temperature of the first-stage inter-stage reheater meet the starting air intake requirement of the first-stage air expansion machine;
Step A136, sending an instruction of fully opening an outlet isolation valve of the first-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the first-stage air expansion machine, and sending a command of waiting for the outlet air pressure of the first-stage interstage reheater and the outlet air temperature of the first-stage interstage reheater to meet the starting air intake requirement of the first-stage air expansion machine;
step A137, judging whether the bypass regulating valve of the first-stage air expander is in a closed state, if not, executing the step A138;
step a138, a command is issued to fully close the first stage air expander bypass trim valve.
18. The operation control method of the expansion power generation system according to claim 17, wherein the selecting, as the current target control object, the corresponding at least one inter-stage reheat air expansion genset according to the target operation condition, and performing a start-up control process of the expansion power generation for the target control object after determining that a single current control object satisfies the inter-stage reheat air expansion genset start-up condition, further comprises:
if the bypass adjusting valve of the first-stage air expander is judged and known to be in a closed state through the step A137, the step A139 is executed;
step A139, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the tenth condition group, if not, executing step A140;
Wherein each condition in the tenth condition group includes:
1) The inlet regulating valve of the first-stage air expander is automatically controlled by the rotating speed of the rotor of the first-stage air expander;
2) The rotating speed of the rotor of the first-stage air expander is increased to a first preset rotating speed according to a first preset acceleration rate;
3) The first clutch has been in a disengaged state;
step A140, sending an instruction of automatically controlling the rotor speed of the first-stage air expander by the inlet regulating valve of the first-stage air expander, and waiting for the rotor speed of the first-stage air expander to rise to a first preset speed according to a first preset acceleration rate, wherein the first clutch is in a disengaged state.
19. The operation control method of the expansion power generation system according to claim 18, wherein the selecting, as the current target control object, the corresponding at least one inter-stage reheat air expansion genset according to the target operation condition, and performing a start-up control process of the expansion power generation for the target control object after determining that a single current control object satisfies the inter-stage reheat air expansion genset start-up condition, further comprises:
if the current state of the first inter-stage reheating type air expansion generator set completely meets all the conditions in the tenth condition group, the step A141 is executed;
Step A141, judging whether the rotating speed of the rotor of the first-stage air expander is increased to a second preset rotating speed according to a second preset acceleration rate, if so, executing step A142;
step A142, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the twelfth condition group, if not, executing step A143; if yes, go to step A144;
wherein each condition in the twelfth condition group includes:
1) The duration of the rotating speed of the rotor of the first-stage air expander rising to a second preset rotating speed is delayed for a second preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A143, judging whether the rotating speed of the rotor of the first-stage air expander is increased to a third preset rotating speed according to a third preset acceleration rate, if so, executing step A144;
step A144, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the thirteenth condition group, if not, executing step A145; if yes, executing step A146;
wherein each condition in the thirteenth set of conditions comprises:
1) The duration that the first inter-stage reheating air expansion generator set completely meets all the conditions in the twelfth condition group is delayed by a third preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A145, judging whether the rotating speed of the rotor of the first-stage air expander is increased to a fourth preset rotating speed according to a fourth preset acceleration rate, if so, executing step A146;
step A146, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the tenth four-bar set, if not, executing step A147; if yes, go to step A148;
wherein each condition in the fourteenth condition group includes:
1) The duration that the first inter-stage reheat air expansion generator set completely meets all the conditions in the thirteenth condition group is delayed by a fourth preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A147, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the fifteenth condition group, if not, executing step A148; if yes, go to step A149;
Wherein each condition in the fifteenth condition group includes:
1) The generator is already connected to the grid;
2) The load of the unit is automatically controlled after the inlet adjusting valve of the first-stage air expander is put into the unit;
step A148, sending a generator grid-connection instruction, and sending an instruction for putting the first-stage air expander inlet valve adjusting into unit load automatic control;
step A149, judging whether the load of the unit is increased to a first preset load proportion, if so, executing step A150;
step A150, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in the sixteenth condition group, and if not, executing step A151; if yes, go to step A152;
wherein each condition in the sixteenth condition group includes:
1) The duration that the first inter-stage reheat air expansion genset fully meets all conditions in the fifteenth condition group is delayed by a fifth preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements;
step A151, judging whether the load of the unit is increased to a second preset load proportion, if so, executing step A152;
Step A152, judging whether the current state of the first inter-stage reheating type air expansion generator set completely meets all conditions in a seventeenth condition group, if so, finishing all starting steps of the expansion power generation system;
wherein each condition in the seventeenth set of conditions includes:
1) The duration that the first inter-stage reheat air expansion generator set completely meets all the conditions in the sixteenth condition group is delayed by a sixth preset time;
2) All relevant operating parameters of the first inter-stage reheating type air expansion generator set meet the corresponding preset normal state requirements.
20. The operation control method of an expansion power generation system according to claim 16, wherein the selecting, according to the target operation condition, the corresponding at least one inter-stage reheat air expansion genset as the current target control object, and performing a start-up control process of expansion power generation for the target control object after determining that the single current control object satisfies the inter-stage reheat air expansion genset start-up condition, includes:
if the target operation condition is a second-stage operation condition, selecting a first inter-stage reheating type air expansion generator set, a second inter-stage reheating type air expansion generator set and a third inter-stage reheating type air expansion generator set as current target control objects;
If it is determined in step 126 that the current state of the high-temperature heat storage medium pump completely meets all the conditions in the sixth condition group, performing step B128;
step B128, determining whether the current state of the current target control object completely satisfies all the conditions in the eighteenth condition group, if not, executing step B129; if yes, go to step B130;
wherein each condition in the eighteenth condition group includes:
1) The second-stage air storage chamber is used for enabling the air expander to seal the air outlet isolation valves to be in an open state;
2) The first stage air expander sealing air inlet isolation valve and the second stage air expander sealing air inlet isolation valve are both in an open state;
3) The third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are both in a closed state;
4) The first clutch has been placed in a locked state;
5) The second clutch has been placed in an unlocked state;
step B129, sending an instruction for fully opening a sealing air outlet isolation valve of the air expander in the second-stage air storage chamber, sending an instruction for fully opening a sealing air inlet isolation valve of the first-stage air expander and a sealing air inlet isolation valve of the second-stage air expander, sending an instruction for fully closing a sealing air inlet isolation valve of the third-stage air expander and a sealing air inlet isolation valve of the fourth-stage air expander, sending an instruction for locking the first clutch 7, and sending an instruction for unlocking the second clutch;
Step B130, judging whether the current state of the current target control object completely meets all the conditions in the nineteenth condition group, if so, executing step B131;
wherein each condition in the nineteenth condition group includes:
1) The air supply pressure of the sealing air of the first-stage air expander and the air supply pressure of the sealing air of the second-stage air expander meet the corresponding preset normal state requirements;
2) The air supply pressure of the isolation air of the first-stage air expander and the air supply pressure of the isolation air of the second-stage air expander meet the corresponding preset normal state requirements;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a bearing at the first end of the generator, the temperature of a bearing at the second end of the generator, the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
5) The temperature of a first end bearing of the first-stage air expander, the temperature of a second end bearing of the first-stage air expander, the temperature of a first end bearing of the second-stage air expander and the temperature of a second end bearing of the second-stage air expander meet the corresponding requirements of a preset normal state;
6) The temperature of the three-phase coil of the generator meets the corresponding preset normal state requirement;
7) The first end bearing lubricating oil return temperature of the first-stage air expander, the second end bearing lubricating oil return temperature of the first-stage air expander, the first end bearing lubricating oil return temperature of the second-stage air expander, the second end bearing lubricating oil return temperature of the second-stage air expander, the first clutch lubricating oil return temperature and the second clutch lubricating oil return temperature meet the corresponding preset normal state requirements;
8) The first end shaft vibration of the generator, the second end shaft vibration of the generator, the first end shaft vibration of the speed reducer of the gear box, the second end shaft vibration of the speed reducer of the gear box, the first end shaft vibration of the first-stage air expander, the second end shaft vibration of the first-stage air expander, the first end shaft vibration of the second-stage air expander and the second end shaft vibration of the second-stage air expander meet the corresponding preset normal state requirements;
9) The first stage air expander shaft displacement, the second stage air expander shaft displacement, the first clutch shaft displacement and the second clutch shaft displacement meet corresponding preset normal state requirements;
10 The first clutch shaft misalignment magnitude and the second clutch shaft misalignment magnitude meet the corresponding preset normal state requirements;
Step B131, judging whether the current state of the current target control object completely meets all the conditions in the twenty-th condition group, if not, executing step B132; if yes, go to step B133;
wherein each condition in the twenty-fourth condition group includes:
1) The first stage air expander inlet shut-off valve and the first stage air expander inlet regulating valve are both in an open state;
2) The second-stage air expander inlet shut-off valve and the second-stage air expander inlet adjusting valve are both in a closed state;
3) The bypass regulating valves of the first-stage air expander are all in a closed state;
step B132, sending an instruction for fully opening the inlet cutoff valve of the first-stage air expansion machine and the inlet regulating valve of the first-stage air expansion machine, sending an instruction for fully closing the inlet cutoff valve of the second-stage air expansion machine and the inlet regulating valve of the second-stage air expansion machine, and sending an instruction for fully closing the bypass regulating valve of the first-stage air expansion machine;
step B133, determining whether the current state of the current target control object completely satisfies all conditions in the twentieth condition group, if not, executing step B134;
wherein each condition in the twenty-second set of conditions includes:
1) The outlet regulating valve of the second-stage air storage chamber is put into the outlet air pressure automatic control of the second-stage interstage reheater;
2) The bypass adjusting valve of the second-stage air expander is opened to a second preset opening degree;
3) The first-stage inter-stage reheater heat storage medium side inlet isolation valve, the first-stage inter-stage reheater heat storage medium side outlet isolation valve, the second-stage inter-stage reheater heat storage medium side inlet isolation valve and the second-stage inter-stage reheater heat storage medium side outlet isolation valve are all in an open state;
4) A first-stage inter-stage reheater heat storage medium side inlet adjusting valve and a second-stage inter-stage reheater heat storage medium side inlet adjusting valve are respectively used for automatically controlling the outlet air temperature of the first-stage inter-stage reheater and the outlet air temperature of the second-stage inter-stage reheater;
and step B134, sending an instruction that a second-stage air storage chamber outlet regulating valve is thrown into outlet air pressure automatic control of a second-stage inter-stage reheater, sending an instruction that a second-stage air expander bypass regulating valve is opened to a second preset opening degree, sending an instruction that a first-stage inter-stage reheater heat storage medium side inlet isolating valve and a first-stage inter-stage reheater heat storage medium side outlet isolating valve are fully opened, sending an instruction that a second-stage inter-stage reheater heat storage medium side inlet isolating valve and a second-stage inter-stage reheater heat storage medium side outlet isolating valve are fully opened, and sending an instruction that a first-stage inter-stage reheater heat storage medium side inlet regulating valve and a second-stage inter-stage reheater heat storage medium side inlet regulating valve are respectively thrown into outlet air temperature of the first-stage inter-stage reheater and outlet air temperature automatic control of the second-stage inter-stage reheater.
21. The operation control method of the expansion power generation system according to claim 20, wherein the selecting, according to the target operation condition, the corresponding at least one inter-stage reheat air expansion genset as the current target control object, and performing a start-up control process of the expansion power generation for the target control object after determining that the single current control object satisfies the inter-stage reheat air expansion genset start-up condition includes:
if the current state of the current target control object is judged and known to completely meet all the conditions in the twentieth condition group through the step B133, executing the step B135;
step B135, determining whether the current state of the current target control object completely satisfies all the conditions in the twentieth condition group, if not, executing step B136; if yes, go to step B137;
wherein each condition in the twenty-second condition group includes:
1) The second-stage air storage chamber outlet isolation valves are all in an open state;
2) The inlet cut-off valves of the second-stage air expander are all in an open state;
3) The second stage inter-stage reheater outlet air pressure and the second stage inter-stage reheater outlet air temperature meet the starting air intake requirement of the second stage air expansion machine;
Step B136, sending an instruction of fully opening an outlet isolation valve of the second-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the second-stage air expansion machine, and waiting for the outlet air pressure of the second-stage inter-stage reheater and the outlet air temperature of the second-stage inter-stage reheater to meet the starting air intake requirement of the second-stage air expansion machine;
step B137, judging whether the bypass regulating valves of the second-stage air expander are all in a closed state, and if not, executing the step B138; if yes, go to step B139;
step B138, sending a command of fully closing a bypass adjusting valve of the second-stage air expander;
step B139, judging whether the current state of the current target control object completely meets all the conditions in the twenty-third component group, if not, executing step B140; if yes, go to step B141;
wherein each condition in the twenty-third group includes:
1) The inlet regulating valve of the second-stage air expander is automatically controlled by the rotating speed of the rotor of the second-stage air expander;
2) The rotor speed of the first-stage air expander and the rotor speed of the second-stage air expander are increased to a first preset speed according to a first preset acceleration rate;
3) The first clutch is already in an engaged state, and the second clutch is already in a disengaged state;
Step B140, sending an instruction for fully opening the inlet regulating valve of the first-stage air expander, sending an instruction for automatically controlling the rotor speed of the second-stage air expander when the inlet regulating valve of the second-stage air expander is put into the second-stage air expander, and waiting for the rotor speed of the first-stage air expander and the rotor speed of the second-stage air expander to rise to a first preset speed according to a first preset acceleration rate, the first clutch is in a meshed state, and the second clutch is in a disconnected state;
step B141, judging whether the rotor rotating speed of the first-stage air expander and the rotor rotating speed S3 of the second-stage air expander are increased to a second preset rotating speed according to a second preset acceleration rate, if so, executing step B142;
step B142, determining whether the current state of the current target control object completely satisfies all conditions in the twenty-fourth condition group, if yes, executing step B143;
wherein each condition in the twenty-fourth group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the twenty-third group is delayed by a second preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
Step B143, judging whether the rotating speed of the rotor of the first-stage air expander and the rotating speed of the rotor of the second-stage air expander are increased to a third preset rotating speed according to a third preset acceleration rate, if so, executing step B144;
step B144, determining whether the current state of the current target control object completely satisfies all conditions in the second fifteen condition group, if yes, executing step B145;
wherein each condition in the second fifteen condition group comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the twenty-fourth group is delayed by a third preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step B145, judging whether the rotating speed of the rotor of the first-stage air expander and the rotating speed of the rotor of the second-stage air expander are increased to a fourth preset rotating speed according to a fourth preset acceleration rate; if yes, go to step B146;
step B146, determining whether the current state of the current target control object completely satisfies all conditions in the twenty-sixth condition group, if yes, executing step B147;
wherein each condition in the twenty-sixth condition group includes:
1) The duration that the current state of the current target control object fully satisfies all the conditions in the second fifteen condition group has been delayed by a fourth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step B147, determining whether the current state of the current target control object completely meets all the conditions in the twenty-seventh condition group, if not, executing step B148; if yes, go to step B149;
wherein each condition in the twenty-seventh condition group includes:
1) The generator is connected to the grid;
2) The inlet regulating valve of the second stage air expander is put into the unit for automatic control;
step B148, sending a generator grid-connection instruction, and sending an instruction for automatically controlling the load of the second-stage air expander when the inlet regulating valve is put into the unit;
step B149, judging whether the load of the unit is increased to a first preset load proportion, if so, executing step B150;
step B150, judging whether the current state of the current target control object completely meets all the conditions in the twenty-eighth condition group, if so, executing step B151;
wherein each condition in the twenty-eighth condition group comprises:
1) Delaying the duration of the unit load increasing to the first preset load proportion by a fifth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step B151, judging whether the load of the unit is increased to a second preset load proportion, if so, executing step B152;
step B152, judging whether the current state of the current target control object completely meets all the conditions in the second nineteen condition group, if so, finishing all the starting steps of the expansion power generation system;
wherein each condition in the second nineteen condition group comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the twenty-eighth condition group is delayed by a sixth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements.
22. The operation control method of an expansion power generation system according to claim 16, wherein the selecting, according to the target operation condition, the corresponding at least one inter-stage reheat air expansion genset as the current target control object, and performing a start-up control process of expansion power generation for the target control object after determining that the single current control object satisfies the inter-stage reheat air expansion genset start-up condition, includes:
If the target operation condition is a third-stage operation condition, selecting a first inter-stage reheating air expansion generator set, a second inter-stage reheating air expansion generator set and a third inter-stage reheating air expansion generator set as current target control objects;
if the current state of the high-temperature heat storage medium pump is judged to completely meet all the conditions in the sixth condition group through the step 126, executing a step C128;
step C128, determining whether the current state of the current target control object completely satisfies all the conditions in the thirty-third condition groups, if not, executing step C129; if yes, go to step C130;
wherein each condition in the thirty-third set of conditions comprises:
1) The third-stage air storage chamber is used for opening the air outlet isolating valves of the air expansion machine;
2) The first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve and the third stage air expander sealing air inlet isolation valve are all in an open state;
3) The fourth-stage air expander sealing air inlet isolation valves are all in a closed state;
4) The first clutch and the second clutch have been placed in a locked state;
5) The third clutch has been placed in an unlocked state;
Step C129, sending an instruction of fully opening a third-stage air storage chamber for sealing an air outlet isolation valve of the air expansion machine, sending an instruction of fully opening a first-stage air expansion machine sealing air inlet isolation valve, a second-stage air expansion machine sealing air inlet isolation valve and a third-stage air expansion machine sealing air inlet isolation valve, sending an instruction of fully closing a fourth-stage air expansion machine sealing air inlet isolation valve, sending an instruction of locking a first clutch and a second clutch, and sending an instruction of unlocking a third clutch;
step C130, determining whether the current state of the current target control object completely satisfies all conditions in the thirtieth condition group, if yes, executing step C131;
wherein each condition in the thirty-first set of conditions comprises:
1) The air supply pressure of the sealing air of the first-stage air expander, the air supply pressure of the sealing air of the second-stage air expander and the air supply pressure of the sealing air of the third-stage air expander meet the corresponding requirements of a preset normal state;
2) The air supply pressure of the isolated air of the first-stage air expander, the air supply pressure of the isolated air of the second-stage air expander and the air supply pressure of the isolated air of the third-stage air expander meet the corresponding preset normal state requirements;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a bearing at the first end of the generator, the temperature of a bearing at the second end of the generator, the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
5) The temperature of a first end bearing of the first stage air expander, the temperature of a second end bearing of the first stage air expander, the temperature of a first end bearing of the second stage air expander, the temperature of a second end bearing of the second stage air expander, the temperature of a first end bearing of the third stage air expander and the temperature of a second end bearing of the third stage air expander meet corresponding preset normal state requirements;
6) The temperature of the three-phase coil of the generator meets the corresponding preset normal state requirement;
7) The first-stage air expander first end bearing lubricating oil return temperature, the first-stage air expander second end bearing lubricating oil return temperature, the second-stage air expander first end bearing lubricating oil return temperature, the second-stage air expander second end bearing lubricating oil return temperature, the third-stage air expander first end bearing lubricating oil return temperature, the third-stage air expander second end bearing lubricating oil return temperature, the first clutch lubricating oil return temperature, the second clutch lubricating oil return temperature and the third clutch lubricating oil return temperature meet corresponding preset normal state requirements;
8) The shaft vibration of a first end of the generator, the shaft vibration of a second end of the generator, the shaft vibration of a first end of a speed reducer of a gear box, the shaft vibration of a second end of the speed reducer of the gear box, the shaft vibration of a first end of a first-stage air expander, the shaft vibration of a second end of the first-stage air expander, the shaft vibration of a first end of a second-stage air expander, the shaft vibration of a second end of the second-stage air expander, the shaft vibration of a first end of a third-stage air expander and the shaft vibration of a second end of the third-stage air expander meet the corresponding requirements of a preset normal state;
9) The first stage air expander shaft displacement, the second stage air expander shaft displacement, the third stage air expander shaft displacement, the first clutch shaft displacement, the second clutch shaft displacement and the third clutch shaft displacement meet corresponding preset normal state requirements;
10 The first clutch shaft misalignment amount, the second clutch shaft misalignment amount and the third clutch shaft misalignment amount meet the corresponding preset normal state requirements;
step C131, determining whether the current state of the current target control object completely satisfies all the conditions in the thirty-second condition group, if not, executing step C132; if yes, go to step C133;
wherein each condition in the thirty-second condition group includes:
1) The first-stage air expander inlet shut-off valve, the second-stage air expander inlet shut-off valve, the first-stage air expander inlet regulating valve and the second-stage air expander inlet regulating valve are all in an open state;
2) The third-stage air expander inlet shut-off valve and the third-stage air expander inlet adjusting valve are both in a closed state;
3) The first stage air expander bypass regulating valve and the second stage air expander bypass regulating valve are both in a closed state;
step C132, sending out an instruction for fully opening the inlet cutoff valve of the first-stage air expansion machine and the inlet cutoff valve of the second-stage air expansion machine, sending out an instruction for fully opening the inlet regulating valve of the first-stage air expansion machine and the inlet regulating valve of the second-stage air expansion machine, sending out an instruction for fully closing the inlet cutoff valve of the third-stage air expansion machine and the inlet regulating valve of the third-stage air expansion machine, and sending out an instruction for fully closing the bypass regulating valve of the first-stage air expansion machine and the bypass regulating valve of the second-stage air expansion machine;
step C133, determining whether the current state of the current target control object completely satisfies all conditions in the thirty-third component group, if not, executing step C134; if yes, go to step C135;
wherein each condition in the thirty-third group includes:
1) The outlet regulating valve of the third-stage air storage chamber is automatically controlled by the outlet air pressure of the reheater in the third-stage air storage chamber;
2) The bypass adjusting valve of the third-stage air expander is opened to a second preset opening degree;
3) The heat storage medium side inlet isolation valve of the first-stage interstage reheater, the heat storage medium side outlet isolation valve of the first-stage interstage reheater, the heat storage medium side inlet isolation valve of the second-stage interstage reheater, the heat storage medium side outlet isolation valve of the second-stage interstage reheater, the heat storage medium side inlet isolation valve of the third-stage interstage reheater and the heat storage medium side outlet isolation valve of the third-stage interstage reheater are all in an open state;
4) A first-stage inter-stage reheater heat storage medium side inlet adjusting valve, a second-stage inter-stage reheater heat storage medium side inlet adjusting valve and a third-stage inter-stage reheater heat storage medium side inlet adjusting valve are respectively used for automatically controlling the outlet air temperature of the first-stage inter-stage reheater, the outlet air temperature of the second-stage inter-stage reheater and the outlet air temperature of the third-stage inter-stage reheater;
step C134, sending an instruction for automatically controlling the pressure of the outlet air of the third-stage inter-stage reheater by a third-stage air storage chamber outlet adjusting valve, sending an instruction for opening a third-stage air expander bypass adjusting valve to a second preset opening degree, sending an instruction for fully opening a first-stage inter-stage reheater heat-storage medium side inlet isolating valve and a first-stage inter-stage reheater heat-storage medium side outlet isolating valve, sending an instruction for fully opening a second-stage inter-stage reheater heat-storage medium side inlet isolating valve and a second-stage inter-reheater heat-storage medium side outlet isolating valve, sending an instruction for fully opening a third-stage inter-reheater heat-storage medium side inlet isolating valve and a third-stage inter-reheater heat-storage medium side outlet isolating valve, and sending an instruction for automatically controlling the temperature of the outlet air of the first-stage reheater heat-storage medium side inlet adjusting valve, the second-stage inter-reheater heat-storage medium side inlet adjusting valve and the third-stage inter-reheater heat-storage medium side inlet adjusting valve respectively;
Step C135, judging whether the current state of the current target control object completely meets all the conditions in the thirty-fourth group, if not, executing step C136; if yes, go to step C137;
wherein each condition in the thirty-fourth group comprises:
1) The outlet isolation valves of the third-stage air storage chamber are all in an open state;
2) The inlet cut-off valves of the third-stage air expander are all in an open state;
3) The air pressure and the air temperature of the outlet of the third-stage inter-stage reheater meet the starting air inlet requirement of the third-stage air expander;
step C136, sending an instruction of fully opening an outlet isolation valve of the third-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the third-stage air expansion machine, and waiting for the outlet air pressure of the third-stage interstage reheater and the outlet air temperature of the third-stage interstage reheater to meet the starting air inlet requirement of the third-stage air expansion machine;
step C137, judging whether the bypass regulating valve of the third-stage air expander is in a closed state, if not, executing the step C138;
step C138, a command is issued to fully close the third stage air expander bypass trim valve.
23. The operation control method of an expansion power generation system according to claim 22, wherein the selecting, according to the target operation condition, the corresponding at least one inter-stage reheat air expansion genset as the current target control object, and performing a start-up control process of expansion power generation for the target control object after determining that the single current control object satisfies the inter-stage reheat air expansion genset start-up condition, further comprises:
If the third-stage air expander bypass regulating valve is judged and known to be in the closed state through the step C137, the step C139 is executed;
step C139, judging whether the current state of the current target control object completely meets all the conditions in the thirty-fifth condition group, if not, executing step C140; if yes, go to step C141;
wherein each condition in the thirty-fifth set of conditions comprises:
1) The inlet regulating valve of the third-stage air expander is already put into the third-stage air expander for automatically controlling the rotating speed of the rotor of the third-stage air expander;
2) The rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander and the rotor speed of the third-stage air expander are increased to a first preset speed according to a first preset acceleration rate;
3) The first clutch and the second clutch are already in an engaged state, and the third clutch is already in a disengaged state;
step C140, sending an instruction of automatically controlling the rotor speed of the third-stage air expander by switching an inlet regulating valve of the third-stage air expander, and waiting for the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander and the rotor speed of the third-stage air expander to rise to a first preset speed and a first clutch according to a first preset acceleration rate, wherein the second clutch is in a meshed state, and the third clutch is in a disengaged state;
Step C141, judging whether the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander and the rotor speed of the third-stage air expander are increased to a second preset speed according to a second preset acceleration rate, if so, executing step C142;
step C142, determining whether the current state of the current target control object completely meets all the conditions in the thirty-sixth condition group, if yes, executing step C143;
wherein each condition in the thirty-sixth set of conditions comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the thirty-fifth condition group is delayed by a second preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C143, judging whether the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander and the rotor speed of the third-stage air expander are increased to a third preset speed according to a third preset acceleration rate, and if yes, executing step C144;
step C144, determining whether the current state of the current target control object completely meets all the conditions in the thirty-seventh condition group, if yes, executing step C145;
Wherein each condition in the thirty-seventh set of conditions comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the thirty-sixth condition group is delayed by a third preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C145, judging whether the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander and the rotating speed of the rotor of the third-stage air expander are increased to a fourth preset rotating speed according to a fourth preset acceleration rate, if yes, executing the step C146;
step C146, determining whether the current state of the current target control object completely satisfies all conditions in the thirty-eighth condition group, if yes, executing step C147;
wherein each condition in the thirty-eighth set of conditions comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the thirty-seventh condition group is delayed by a fourth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C147, determining whether the current state of the current target control object completely satisfies all the conditions in the thirty-ninth condition group, if not, executing step C148; if yes, go to step C149;
Wherein each condition in the thirty-ninth set of conditions comprises:
1) The generator is connected to the grid;
2) The load of the third stage air expander is automatically controlled after the inlet adjusting valve is put into the unit;
step C148, sending a generator grid connection instruction, and sending an instruction for putting the third-stage air expander inlet valve regulation into unit load automatic control;
step C149, judging whether the unit load is increased to a first preset load proportion, if so, executing step C150;
step C150, judging whether the current state of the current target control object completely meets all the conditions in the forty-fourth condition group, if so, executing step C151;
wherein each condition in the forty-fourth condition set comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the thirty-ninth condition group is delayed by a fifth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step C151, judging whether the load of the unit is increased to a second preset load proportion, if so, executing step C152;
step C152, judging whether the current state of the current target control object completely meets all the conditions in the fortieth condition group, if so, finishing all the starting steps of the expansion power generation system;
Wherein each condition in the fortieth set of conditions includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the forty-fourth condition group is delayed by a sixth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements.
24. The operation control method of an expansion power generation system according to claim 16, wherein the selecting, according to the target operation condition, the corresponding at least one inter-stage reheat air expansion genset as the current target control object, and performing a start-up control process of expansion power generation for the target control object after determining that the single current control object satisfies the inter-stage reheat air expansion genset start-up condition, includes:
if the target operation condition is a fourth-stage operation condition, selecting a first inter-stage reheating type air expansion generator set, a second inter-stage reheating type air expansion generator set, a third inter-stage reheating type air expansion generator set and a fourth inter-stage reheating type air expansion generator set as current target control objects;
if the current state of the high-temperature heat storage medium pump is judged to completely meet all the conditions in the sixth condition group through the step 126, executing a step D128;
Step D128, judging whether the current state of the current target control object completely meets all the conditions in the fortieth two-condition group, if not, executing the step D129; if yes, go to step D130;
wherein each condition in the forty-second condition group includes:
1) The fourth-stage air storage chamber is used for enabling the air expander to seal the air outlet isolation valves to be in an open state;
2) The first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are all in an open state;
3) The first clutch, the second clutch and the third clutch have been placed in a locked state;
step D129, sending an instruction for fully opening a fourth-stage air storage chamber to seal an air outlet isolation valve of the air expansion machine, sending an instruction for fully opening a first-stage air expansion machine sealing air inlet isolation valve, a second-stage air expansion machine sealing air inlet isolation valve, a third-stage air expansion machine sealing air inlet isolation valve and a fourth-stage air expansion machine sealing air inlet isolation valve, and sending an instruction for locking a first clutch, a second clutch and a third clutch;
Step D130, judging whether the current state of the current target control object completely meets all the conditions in the forty-third group, if so, executing step D131;
wherein each condition in the forty-third group includes:
1) The air supply pressure of the sealing air of the first-stage air expander, the air supply pressure of the sealing air of the second-stage air expander, the air supply pressure of the sealing air of the third-stage air expander and the air supply pressure of the sealing air of the fourth-stage air expander meet the corresponding requirements of a preset normal state;
2) The air supply pressure of the isolation air of the first-stage air expander, the air supply pressure of the isolation air of the second-stage air expander, the air supply pressure of the isolation air of the third-stage air expander and the air supply pressure of the isolation air of the fourth-stage air expander meet the corresponding preset normal state requirements;
3) The lubricating oil supply pressure meets the corresponding preset normal state requirement, and the differential pressure of the lubricating oil filter is not alarmed;
4) The temperature of a bearing at the first end of the generator, the temperature of a bearing at the second end of the generator, the temperature of a bearing at the first end of the speed reducer of the gear box and the temperature of a bearing at the second end of the speed reducer of the gear box meet the corresponding requirements of a preset normal state;
5) The temperature of a first end bearing of a first stage air expander, the temperature of a second end bearing of the first stage air expander, the temperature of a first end bearing of a second stage air expander, the temperature of a second end bearing of the second stage air expander, the temperature of a first end bearing of a third stage air expander, the temperature of a second end bearing of the third stage air expander, the temperature of a first end bearing of a fourth stage air expander and the temperature of a second end bearing of the fourth stage air expander meet corresponding preset normal state requirements;
6) The temperature of the three-phase coil of the generator meets the corresponding preset normal state requirement;
7) The first end bearing lubricating oil return temperature of the first-stage air expander, the second end bearing lubricating oil return temperature of the first-stage air expander, the first end bearing lubricating oil return temperature of the second-stage air expander, the second end bearing lubricating oil return temperature of the second-stage air expander, the first end bearing lubricating oil return temperature of the third-stage air expander, the second end bearing lubricating oil return temperature of the third-stage air expander, the first end bearing lubricating oil return temperature of the fourth-stage air expander, the second end bearing lubricating oil return temperature of the fourth-stage air expander, the first clutch lubricating oil return temperature, the second clutch lubricating oil return temperature and the third clutch lubricating oil return temperature meet corresponding preset normal state requirements;
8) The first end shaft vibration of the generator, the second end shaft vibration of the generator, the first end shaft vibration of the speed reducer of the gear box, the second end shaft vibration of the speed reducer of the gear box, the first end shaft vibration of the first air expander, the second end shaft vibration of the first air expander, the first end shaft vibration of the second air expander, the second end shaft vibration of the second air expander, the first end shaft vibration of the third air expander, the second end shaft vibration of the third air expander, the first end shaft vibration of the fourth air expander and the second end shaft vibration of the fourth air expander meet the corresponding preset normal state requirements;
9) The first stage air expander shaft displacement, the second stage air expander shaft displacement, the third stage air expander shaft displacement, the fourth stage air expander shaft displacement, the first clutch shaft displacement, the second clutch shaft displacement and the third clutch shaft displacement meet corresponding preset normal state requirements;
10 The first clutch shaft misalignment amount, the second clutch shaft misalignment amount and the third clutch shaft misalignment amount meet the corresponding preset normal state requirements;
step D131, judging whether the current state of the current target control object completely meets all the conditions in the forty-fourth condition group, if not, executing step D132; if yes, go to step D133;
wherein each condition in the forty-fourth group includes:
1) The first stage air expander inlet cut-off valve, the second stage air expander inlet cut-off valve, the third stage air expander inlet cut-off valve, the first stage air expander inlet regulating valve, the second stage air expander inlet regulating valve and the third stage air expander inlet regulating valve are all in an open state;
2) The fourth-stage air expander inlet shut-off valve and the fourth-stage air expander inlet regulating valve are both in a closed state;
3) The first stage air expander bypass regulating valve, the second stage air expander bypass regulating valve and the third stage air expander bypass regulating valve are all in a closed state;
step D132, sending an instruction for fully opening the first-stage air expander inlet cutoff valve, the second-stage air expander inlet cutoff valve and the third-stage air expander inlet cutoff valve, sending an instruction for fully opening the first-stage air expander inlet regulating valve, the second-stage air expander inlet regulating valve and the third-stage air expander inlet regulating valve, sending an instruction for fully closing the fourth-stage air expander inlet cutoff valve and the fourth-stage air expander inlet regulating valve, and sending an instruction for fully closing the first-stage air expander bypass regulating valve, the second-stage air expander bypass regulating valve and the third-stage air expander bypass regulating valve;
step D133, determining whether the current state of the current target control object completely satisfies all the conditions in the forty-fifth condition group, and if not, executing step D134; if yes, go to step D135;
wherein each condition in the forty-fifth set of conditions comprises:
1) An outlet adjusting valve of the fourth-stage air storage chamber is automatically controlled by the outlet air pressure of the reheater in the fourth-stage air storage chamber;
2) The fourth-stage air expander bypass regulating valve is opened to a second preset opening degree;
3) The heat storage medium side inlet isolation valve of the first-stage interstage reheater, the heat storage medium side outlet isolation valve of the first-stage interstage reheater, the heat storage medium side inlet isolation valve of the second-stage interstage reheater, the heat storage medium side outlet isolation valve of the second-stage interstage reheater, the heat storage medium side inlet isolation valve of the third-stage interstage reheater, the heat storage medium side outlet isolation valve of the third-stage interstage reheater, the heat storage medium side inlet isolation valve of the fourth-stage interstage reheater and the heat storage medium side outlet isolation valve of the fourth-stage interstage reheater are all in an open state;
4) A first-stage inter-stage reheater heat storage medium side inlet adjusting valve, a second-stage inter-stage reheater heat storage medium side inlet adjusting valve, a third-stage inter-stage reheater heat storage medium side inlet adjusting valve and a fourth-stage inter-stage reheater heat storage medium side inlet adjusting valve are respectively used for automatically controlling the first-stage inter-stage reheater outlet air temperature, the second-stage inter-stage reheater outlet air temperature, the third-stage inter-stage reheater outlet air temperature and the fourth-stage inter-stage reheater outlet air temperature;
step D134, sending an instruction of automatically controlling the pressure of the outlet air of the fourth-stage inter-stage reheater when the outlet adjusting valve of the fourth-stage air storage chamber is switched into the outlet air of the fourth-stage reheater, sending an instruction of opening the bypass adjusting valve of the fourth-stage air expander to a second preset opening degree, sending an instruction of fully opening the heat-storage medium side inlet isolating valve of the first-stage inter-stage reheater and the heat-storage medium side outlet isolating valve of the first-stage inter-stage reheater, sending an instruction of fully opening the heat-storage medium side inlet isolating valve of the second-stage inter-stage reheater and the heat-storage medium side outlet isolating valve of the second-stage inter-stage reheater, sending an instruction of fully opening the heat-storage medium side inlet isolating valve of the third-stage reheater and the heat-storage medium side outlet isolating valve of the third-stage reheater, sending out an instruction of fully opening a fourth-stage inter-stage reheater heat storage medium side inlet isolation valve and a fourth-stage reheater heat storage medium side outlet isolation valve, and sending out an instruction of automatically controlling a first-stage inter-stage reheater heat storage medium side inlet adjusting valve, a second-stage inter-stage reheater heat storage medium side inlet adjusting valve, a third-stage inter-stage reheater heat storage medium side inlet adjusting valve and a fourth-stage reheater heat storage medium side inlet adjusting valve to respectively input a first-stage inter-stage reheater outlet air temperature, a second-stage inter-reheater outlet air temperature, a third-stage inter-stage reheater outlet air temperature and a fourth-stage inter-stage reheater outlet air temperature;
Step D135, judging whether the current state of the current target control object completely meets all the conditions in the forty-sixth condition group, if not, executing step D136; if yes, go to step D137;
wherein each condition in the forty-sixth condition group includes:
1) The outlet isolation valves of the fourth-stage air storage chamber are all in an open state;
2) The inlet cut-off valves of the fourth-stage air expander are all in an open state;
3) The fourth stage inter-stage reheater outlet air pressure and the fourth stage inter-stage reheater outlet air temperature meet the starting air inlet requirement of the fourth stage air expander;
step D136, sending an instruction of fully opening an outlet isolation valve of the fourth-stage air storage chamber, sending an instruction of fully opening an inlet cut-off valve of the fourth-stage air expansion machine, and waiting for the outlet air pressure of the fourth-stage inter-stage reheater and the outlet air temperature of the fourth-stage inter-stage reheater to meet the starting air intake requirement of the fourth-stage air expansion machine;
step D137, judging whether the bypass regulating valves of the fourth-stage air expander are all in a closed state, and if not, executing step D138; if yes, go to step D139;
step D138, sending a command of fully closing the bypass adjusting valve of the fourth-stage air expander;
Step D139, judging whether the current state of the current target control object completely meets all the conditions in the forty-seventh condition group, if not, executing step D140;
wherein each condition in the forty-seventh condition group comprises:
1) The inlet regulating valve of the fourth-stage air expander is automatically controlled by the rotating speed of the rotor of the fourth-stage air expander;
2) The rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are increased to a first preset speed according to a first preset acceleration rate;
3) The first clutch, the second clutch and the third clutch are already in an engaged state;
and D140, sending an instruction of automatically controlling the rotating speed of the rotor of the fourth-stage air expander by switching the inlet regulating valve of the fourth-stage air expander, and waiting for the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander, the rotating speed of the rotor of the third-stage air expander and the rotating speed of the rotor of the fourth-stage air expander to be increased to a first preset rotating speed according to a first preset acceleration rate, wherein the first clutch, the second clutch and the third clutch are in a meshed state.
25. The operation control method of an expansion power generation system according to claim 24, wherein the selecting, according to the target operation condition, the corresponding at least one inter-stage reheat air expansion genset as the current target control object, and performing a start-up control process of expansion power generation for the target control object after determining that the single current control object satisfies the inter-stage reheat air expansion genset start-up condition, further comprises:
if the current state of the current target control object is judged and obtained to completely meet all the conditions in the forty-seventh condition group through the step D139, executing a step D141;
step D141, judging whether the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander, the rotating speed of the rotor of the third-stage air expander and the rotating speed of the rotor of the fourth-stage air expander are increased to a second preset rotating speed according to a second preset acceleration rate, and if yes, executing step D142;
step D142, determining whether the current state of the current target control object completely satisfies all the conditions in the forty-eighth condition group, if yes, executing step D143;
wherein each condition in the forty-eighth condition group includes:
1) The duration in which the current state of the current target control object completely satisfies all the conditions in the forty-seventh condition group has been delayed by a second preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D143, judging whether the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are increased to a third preset speed according to a third preset acceleration rate, if so, executing step D144;
step D144, judging whether the current state of the current target control object completely meets all the conditions in the forty-ninth condition group, if so, executing step D145;
wherein each condition in the forty-ninth condition group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the forty-eighth condition group is delayed by a third preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D145, judging whether the rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are increased to a fourth preset speed according to a fourth preset acceleration rate, and if yes, executing the step D146;
Step D146, determining whether the current state of the current target control object completely satisfies all conditions in the fifteenth condition group, if yes, executing step D147;
wherein each condition in the fifty-fifth condition group comprises:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the forty-ninth condition group is delayed by a fourth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D147, judging whether the current state of the current target control object completely meets all the conditions in the fifty-th condition group, if not, executing step D148; if yes, go to step D149;
wherein each condition in the fifty-th condition group includes:
1) The generator is already connected to the grid;
2) The inlet regulating valve of the fourth-stage air expansion machine is put into the machine set for automatic load control;
step D148, sending a generator grid-connection instruction, and sending an instruction for putting an inlet regulating valve of a fourth-stage air expander into unit load automatic control;
step D149, judging whether the load of the unit is increased to a first preset load proportion, if so, executing the step D150;
Step D150, judging whether the current state of the current target control object completely meets all the conditions in the fifty-second condition group, if so, executing step D151;
wherein each condition in the fifty-second condition group includes:
1) The duration in which the current state of the current target control object completely satisfies all the conditions in the fifty-th condition group has been delayed by a fifth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements;
step D151, judging whether the load of the unit is increased to a second preset load proportion, if so, executing step D152;
step D152, judging whether the current state of the current target control object completely meets all the conditions in the fifty-third group, if so, ending all the starting steps of the expansion power generation system;
wherein each condition in the fifty-third condition group includes:
1) The duration that the current state of the current target control object completely satisfies all the conditions in the fifty-th condition group is delayed by a sixth preset time;
2) All relevant operation parameters of the current target control object meet the corresponding preset normal state requirements.
26. The operation control method of the expansion power generation system according to claim 11, further comprising, after the executing of the start-up control process of the expansion power generation for the target control object:
controlling the load of the target control object to be reduced to a preset extremely low value, fully closing an inlet cut-off valve and an inlet adjusting valve of each level of air expander and triggering generator reverse power protection;
and stopping the target control object.
27. The operation control method of an expansion power generation system according to claim 26, wherein the controlling of the load of the target control object to a preset extremely low value, fully closing the air expander inlet shutoff valve and the inlet regulating valve at each stage and triggering generator reverse power protection, comprises:
step 201, judging whether the load of the current target control object is reduced to a third preset load proportion, if so, executing step 202;
step 202, judging whether the current state of the current target control object completely meets all conditions in the fifty-fourth group, if not, executing step 203;
wherein each condition in the fifty-fourth group of conditions includes:
1) The first stage air expander inlet cut-off valve, the second stage air expander inlet cut-off valve, the third stage air expander inlet cut-off valve and the fourth stage air expander inlet cut-off valve are all in a closed state;
2) The inlet regulating valve of the first-stage air expander, the inlet regulating valve of the second-stage air expander, the inlet regulating valve of the third-stage air expander and the inlet regulating valve of the fourth-stage air expander are all in a closed state;
3) The outlet isolation valve of the first-stage air storage chamber, the outlet isolation valve of the second-stage air storage chamber, the outlet isolation valve of the third-stage air storage chamber and the outlet isolation valve of the fourth-stage air storage chamber are all in a closed state;
4) The outlet regulating valve of the first-stage air storage chamber, the outlet regulating valve of the second-stage air storage chamber, the outlet regulating valve of the third-stage air storage chamber and the outlet regulating valve of the fourth-stage air storage chamber are all in a closed state;
5) The first stage air expander bypass regulating valve, the second stage air expander bypass regulating valve, the third stage air expander bypass regulating valve and the fourth stage air expander bypass regulating valve are all in an open state;
6) The system comprises a first-stage inter-stage reheater heat storage medium side inlet isolation valve, a first-stage inter-stage reheater heat storage medium side outlet isolation valve, a second-stage inter-stage reheater heat storage medium side inlet isolation valve, a second-stage inter-stage reheater heat storage medium side outlet isolation valve, a third-stage inter-stage reheater heat storage medium side inlet isolation valve, a third-stage inter-stage reheater heat storage medium side outlet isolation valve, a fourth-stage inter-stage reheater heat storage medium side inlet isolation valve and a fourth-stage inter-stage reheater heat storage medium side outlet isolation valve, which are all in a closed state;
7) The first-stage interstage reheater heat storage medium side inlet adjusting valve, the second-stage interstage reheater heat storage medium side inlet adjusting valve, the third-stage interstage reheater heat storage medium side inlet adjusting valve and the fourth-stage interstage reheater heat storage medium side inlet adjusting valve are all in a closed state;
8) The generator reverse power protection is triggered;
step 203, sending out an instruction of fully closing the first-stage air expander inlet cut-off valve, the second-stage air expander inlet cut-off valve, the third-stage air expander inlet cut-off valve and the fourth-stage air expander inlet cut-off valve, sending out an instruction of fully closing the first-stage air expander inlet regulating valve, the second-stage air expander inlet regulating valve, the third-stage air expander inlet regulating valve and the fourth-stage air expander inlet regulating valve, sending out an instruction of fully closing the first-stage air storage chamber outlet isolating valve, the second-stage air storage chamber outlet isolating valve, the third-stage air storage chamber outlet isolating valve and the fourth-stage air storage chamber outlet regulating valve, sending out an instruction of fully closing the first-stage air storage chamber outlet regulating valve, the second-stage air expander bypass regulating valve, the third-stage air expander bypass regulating valve and the fourth-stage air expander bypass regulating valve, sending out an instruction for fully closing the first-stage inter-stage reheater heat-storage medium side inlet isolation valve and the first-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction for fully closing the second-stage inter-stage reheater heat-storage medium side inlet isolation valve and the second-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction for fully closing the third-stage inter-stage reheater heat-storage medium side inlet isolation valve and the third-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction for fully closing the fourth-stage reheater heat-storage medium side inlet isolation valve and the fourth-stage reheater heat-storage medium side outlet isolation valve, sending out an instruction for fully closing the first-stage inter-stage reheater heat-storage medium side inlet adjustment valve, the second-stage reheater heat-storage medium side inlet adjustment valve, the third-stage reheater heat-storage medium side inlet adjustment valve and the fourth-stage reheater heat-storage medium side inlet adjustment valve Commanding the valve and waiting for generator reverse power protection to trigger.
28. The operation control method of an expansion power generation system according to claim 27, wherein the shutting down the target control object includes:
if the current state of the current target control object completely meets all the conditions in the fifty-fourth group is judged and known in step 202, executing step a204;
step A204, judging whether the frequency of the frequency converter of the operated high-temperature heat storage medium pump is reduced to a first preset frequency, if not, executing step A205; if yes, execute step A206;
step A205, sending an instruction that the frequency of a frequency converter of an operated high-temperature heat storage medium pump is reduced to a first preset frequency;
step A206, judging whether the high-temperature heat storage medium pump which is not operated releases the starting of the standby pump interlocking, if not, executing the step A207; if yes, go to step A208;
step A207, sending an instruction for releasing the interlock of the starting standby pump when the high-temperature heat storage medium pump is not operated;
step A208, judging whether the running high-temperature heat storage medium pump outlet isolation valves are all in a closed state, if not, executing step A209; if yes, go to step A210;
step A209, sending an instruction of fully closing an outlet isolation valve of the running high-temperature heat storage medium pump;
Step A210, judging whether the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump are stopped, if not, executing step A211; if yes, go to step A212;
step A211 of sending an instruction for stopping the first high-temperature heat storage medium pump and the second high-temperature heat storage medium pump;
step a212, determining whether the current state of the current target control object completely meets all the conditions in the fifty-fifth condition group, if not, executing step a213; if yes, go to step A214;
wherein each condition in the fifty-fifth set of conditions comprises:
1) The first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve are both in a closed state;
2) The first conventional nitrogen sealing device inlet isolation valve and the second conventional nitrogen sealing device inlet isolation valve are both in a closed state;
step A213, sending out an instruction of fully closing the first high-temperature heat storage medium pump inlet isolation valve and the second high-temperature heat storage medium pump inlet isolation valve, and sending out an instruction of fully closing the first conventional nitrogen sealing device inlet isolation valve and the second conventional nitrogen sealing device inlet isolation valve;
step a214, determining whether the duration of the current state of the current target control object completely satisfying all the conditions in the fifty-fifth condition group has been delayed by a seventh preset time, if yes, performing step a215;
Step A215, judging whether the current state of the current target control object completely meets all the conditions in the fifty-sixth condition group, if not, executing step A216; if yes, ending the first parallel flow;
wherein each condition in the fifty-sixth set of conditions comprises:
1) The cooling water inlet isolation valve of the first high-temperature heat storage medium pump and the cooling water outlet isolation valve of the first high-temperature heat storage medium pump are both in a closed state;
2) The cooling water inlet isolation valve of the second high-temperature heat storage medium pump and the cooling water outlet isolation valve of the second high-temperature heat storage medium pump are both in a closed state;
step A216, sending an instruction of fully closing the cooling water inlet isolation valve and the cooling water outlet isolation valve of the first high-temperature heat storage medium pump, and sending an instruction of fully closing the cooling water inlet isolation valve and the cooling water outlet isolation valve of the second high-temperature heat storage medium pump.
29. The operation control method of an expansion power generation system according to claim 27, wherein the shutting down the target control object includes:
if the current state of the current target control object is judged and known to completely meet all the conditions in the fifty-fourth condition group through the step 202, executing a step B204;
Step B204, judging whether the rotating speed of the rotor of the first-stage air expander, the rotating speed of the rotor of the second-stage air expander, the rotating speed of the rotor of the third-stage air expander and the rotating speed of the rotor of the fourth-stage air expander are idled to 0rpm, if so, executing step B205;
step B205, judging whether the current state of the current target control object completely meets all the conditions in the fifty-seventh condition group, if not, executing step B206; if yes, go to step B207;
wherein each condition in the fifty-seventh condition group comprises:
1) The first stage air expander sealing air inlet isolation valve, the second stage air expander sealing air inlet isolation valve, the third stage air expander sealing air inlet isolation valve and the fourth stage air expander sealing air inlet isolation valve are all in a closed state;
2) The first-stage air storage chamber air expander sealing air outlet isolation valve, the second-stage air storage chamber air expander sealing air outlet isolation valve, the third-stage air storage chamber air expander sealing air outlet isolation valve and the fourth-stage air storage chamber air expander sealing air outlet isolation valve are all in a closed state;
step B206, sending an instruction for fully closing the first-stage air expander sealing air inlet isolation valve, the second-stage air expander sealing air inlet isolation valve, the third-stage air expander sealing air inlet isolation valve and the fourth-stage air expander sealing air inlet isolation valve, and sending an instruction for fully closing the first-stage air storage chamber sealing air outlet isolation valve, the second-stage air storage chamber sealing air expander sealing air outlet isolation valve, the third-stage air storage chamber sealing air expander sealing air outlet isolation valve and the fourth-stage air storage chamber sealing air expander sealing air outlet isolation valve;
Step B207, determining whether the current state of the current target control object meets at least one condition in the fifty-eighth condition group, if yes, executing step B208;
wherein each condition in the fifty-eighth condition group comprises:
1) The rotor speed of the first-stage air expander, the rotor speed of the second-stage air expander, the rotor speed of the third-stage air expander and the rotor speed of the fourth-stage air expander are delayed for the duration of the idling to 0rpm by the eighth preset time;
2) The bearing temperature of the first end of the gear box reducer, the bearing temperature of the second end of the gear box reducer, the bearing temperature of the first end of the first air expander, the bearing temperature of the second end of the first air expander, the bearing temperature of the first end of the second air expander, the bearing temperature of the second end of the second air expander, the bearing temperature of the first end of the third air expander, the bearing temperature of the second end of the third air expander, the bearing temperature of the first end of the fourth air expander, the bearing temperature of the second end of the fourth air expander, the oil return temperature of the first clutch lubricating oil, the oil return temperature of the second clutch lubricating oil and the oil return temperature of the third clutch lubricating oil are all smaller than a first preset temperature;
Step B208, judging whether the AC lubricating oil pump and the DC accident oil pump which are not operated have released the starting of the standby pump interlocking, if not, executing step B209; if yes, go to step B210;
step B209, sending an instruction for unlocking the standby pump interlock when the AC lubricating oil pump and the DC accident oil pump are not operated;
step B210, judging whether the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump are stopped, if not, executing step B211; if yes, go to step B212;
step B211, sending out an instruction for stopping the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump;
step B212, judging whether the current state of the current target control object completely meets all the conditions in the fifty-ninth condition group, if not, executing the step B213; if yes, the second parallel flow is ended;
wherein each condition in the fifty-ninth condition group comprises:
1) The isolation main valve of the isolation air inlet of each stage of air expander is in a closed state;
2) The first stage air expander isolation air inlet isolation valve, the second stage air expander isolation air inlet isolation valve, the third stage air expander isolation air inlet isolation valve and the fourth stage air expander isolation air inlet isolation valve are all in a closed state;
3) The first lubricating oil cooling water inlet isolating valve, the second lubricating oil cooling water inlet isolating valve, the first lubricating oil cooling water outlet isolating valve and the second lubricating oil cooling water outlet isolating valve are all in a closed state;
and step B213, sending out an instruction of fully closing the isolating air inlet main valve of each stage of air expander, sending out an instruction of fully closing the isolating air inlet isolating valve of the first stage of air expander, the isolating air inlet isolating valve of the second stage of air expander, the isolating air inlet isolating valve of the third stage of air expander and the isolating air inlet isolating valve of the fourth stage of air expander, sending out an instruction of fully closing the isolating valve of the first lubricating oil cooling water inlet and the isolating valve of the second lubricating oil cooling water inlet, and sending out an instruction of fully closing the isolating valve of the first lubricating oil cooling water outlet and the isolating valve of the second lubricating oil cooling water outlet.
30. An operation control device of an expansion power generation system for controlling an expansion power generation system for a compressed air energy storage power plant according to any one of claims 1 to 9, the operation control device comprising:
the pretreatment module is used for carrying out starting pretreatment on the heat storage medium subsystem and the inter-stage reheat air expansion generator set if the fact that the inter-stage reheat air expansion generator set and the heat storage medium subsystem operate normally is determined;
The expansion power generation operation control module is used for selecting at least one corresponding interstage reheating type air expansion generator set as a current target control object according to a target operation working condition, and executing a starting control process of expansion power generation aiming at the target control object after determining that the single current control object meets a starting condition of the interstage reheating type air expansion generator set;
wherein the start-up control procedure of the expansion power generation of the target control object includes: controlling the target control object to increase in speed to meet a preset mechanical safety requirement; controlling the rotating speed of the target control object to rise to a preset warming value and finishing a warming process; controlling the rotating speed of the target control object to cross a corresponding critical zone within preset time; controlling the rotating speed of the target control object to rise to a rated value so as to complete a speed rising process; and controlling the target control object to execute a grid connection and initial load warming process, and controlling the target control object degree load to continuously increase to a rated load so as to complete the starting process of the expansion power generation corresponding to the target control object.
31. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the operation control method of the expansion power generation system according to any one of claims 10 to 29 when executing the program.
32. A computer-readable storage medium on which a computer program is stored, the computer program being adapted to implement, when executed by a processor, a method of controlling operation of an expansion power generation system according to any one of claims 10 to 29.
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