CN117307277A - APS self-adaptive start-stop control method for two-to-one gas turbine combined cycle unit - Google Patents

APS self-adaptive start-stop control method for two-to-one gas turbine combined cycle unit Download PDF

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Publication number
CN117307277A
CN117307277A CN202311231299.7A CN202311231299A CN117307277A CN 117307277 A CN117307277 A CN 117307277A CN 202311231299 A CN202311231299 A CN 202311231299A CN 117307277 A CN117307277 A CN 117307277A
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China
Prior art keywords
gas turbine
load
starting
combustion engine
aps
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CN202311231299.7A
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Chinese (zh)
Inventor
赵楠
王家东
王亚平
张明
李金峰
闫振东
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Guoneng Guohua Beijing Gas Thermal Power Co ltd
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Guoneng Guohua Beijing Gas Thermal Power Co ltd
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Priority to CN202311231299.7A priority Critical patent/CN117307277A/en
Publication of CN117307277A publication Critical patent/CN117307277A/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
    • 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
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • 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
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/26—Starting; Ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
    • 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
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention discloses an APS self-adaptive start-stop control method of a two-to-one combined cycle unit, which comprises an automatic control module of a first gas turbine, a second gas turbine and an APS system, wherein the automatic control module is used for realizing automatic control of preparation, starting and stopping before starting of the first gas turbine and the second gas turbine; the starting process corresponds to a one-to-one starting mode and a two-to-one starting mode, and according to the selected starting mode of the two-to-one combined cycle unit and the lifting load condition signal of the combustion engine, the lifting load of the corresponding combustion engine in the starting process is controlled to be raised to a unit starting target value; the load is reduced to the lower limit value of AGC, each combustion engine extinguishes fire, the waste heat boiler is stopped for supplying water at high, medium and low pressure, each steam bypass is closed, the condensation water heater is stopped, the condensation water is stopped, the APS stopping step is completed, automatic start-stop is realized through lifting load control in the unit start-stop process, the unit start-stop efficiency is improved, and the automatic control system optimization is facilitated.

Description

APS self-adaptive start-stop control method for two-to-one gas turbine combined cycle unit
Technical Field
The invention relates to a start-stop control method for a gas turbine unit, in particular to an APS self-adaptive start-stop control method for a two-to-one gas turbine combined cycle unit, and belongs to the field of power plants.
Background
In order to ensure the running stability and safety of the two-to-one combined cycle unit, more and more power plants have used an APS unit start-stop control method as a main operation tool for unit running. The unit start-stop control method (Automatic Plant Start-up and Shutdown System, APS for short) is a system for realizing automation of the unit start-up and stop process. However, in the APS implementation process, the process conditions and the flow sequence need to be met in the process of starting, stopping or lifting the load of the unit, the process conditions and the load setting are all completed manually, excessive conditions need to be confirmed to cause more operation of operators, the starting and stopping efficiency of the unit is reduced, meanwhile, misoperation is easily caused during the period, and a certain hidden danger exists in the safety of the unit.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the APS self-adaptive start-stop control method for the two-to-one combined cycle unit, which has the technical characteristics of realizing automatic start-stop, high efficiency, safety and the like through the control of lifting load in the start-stop process of the unit.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the invention relates to an APS self-adaptive start-stop control method of a two-to-one gas turbine combined cycle unit, which comprises a first gas turbine, a second gas turbine and an automatic control module of an APS system, wherein the automatic control module is used for realizing automatic control of preparation, starting and stopping before starting of the first gas turbine and the second gas turbine;
the control method comprises cold start, warm start and hot start, wherein a first gas turbine and/or a second gas turbine start condition signal and a gas turbine lifting load condition signal are obtained before the cold start, the warm start and the hot start; each start corresponds to a one-drag-one start mode and a two-drag-one start mode,
firstly, according to a selected starting mode of the two-to-one combined cycle unit and a lifting load condition signal of a combustion engine, controlling a corresponding combustion engine to lift load in a starting process to a unit starting target value;
then, according to the lifting load condition signals of the gas turbine, the automatic control module controls the first gas turbine and/or the second gas turbine to reduce the load to the AGC lower limit value, the first gas turbine and/or the second gas turbine is/are subjected to primary frequency modulation and exit, the auxiliary gas source is switched, the gas turbine is subjected to load reduction to the stop load, the gas turbines are used for extinguishing fire, the waste heat boiler is stopped for supplying water at high, medium and low pressure, the steam bypasses are closed for 15min, the condensate water heater is stopped, the condensate water is stopped, the waste heat boiler outlet flue gas baffle is closed, and the APS stop step sequence is completed.
Preferably, the start-up procedure comprises:
step 1) acquiring a fuel engine starting condition signal and a load rising condition signal of each fuel engine;
step 2) obtaining automatic switching condition signals according to lifting load condition signals of a first gas turbine and a second gas turbine, wherein the automatic switching condition signals comprise automatic state switching condition signals and automatic state exiting condition signals, lifting loads of the first gas turbine and the second gas turbine are controlled in a starting and stopping process according to the lifting load condition signals and the automatic switching condition signals of the first gas turbine, and the lifting load condition signals of the first gas turbine comprise a starting load increasing condition signal and a lifting load condition signal so as to control lifting loads of the first gas turbine and the second gas turbine in the starting and stopping process;
step 3) according to the selected starting mode of the two-to-one combined cycle unit, the lifting load condition signal of the gas turbine, the automatic state input condition signal of the first gas turbine and/or the second gas turbine, and the lifting load of the corresponding gas turbine in the starting process is controlled: if the selected starting mode of the two-to-one combined cycle unit is a one-to-one starting mode, controlling the load of the corresponding combustion engine to rise to a one-to-one unit starting target value in the starting process according to the automatic state input condition signal of the corresponding combustion engine and the initial load increasing condition signal of the corresponding combustion engine serving as a first starting stage; if the selected starting mode of the two-to-one combined cycle unit is a two-to-one starting mode, according to the automatic state input condition signals of the first gas turbine and the second gas turbine, the first gas turbine is used as a first starting initial load increasing condition signal and the second gas turbine is used as a second starting initial load increasing condition signal, and the loads of the first gas turbine and the second gas turbine are controlled to rise to the two-to-one unit starting target value in the starting process.
Preferably, the cold start comprises: after the corresponding combustion engine to be started is fixed in speed, grid connection is carried out, and at least 10MW load is maintained; when the load of the combustion engine is stable, the high-pressure bypass is fully opened, the control pressure of the medium-pressure bypass is 0.6-1.0MPa, after the lower wall temperature of the high-pressure steam drum is more than 120 ℃, the high-pressure bypass is cut to control pressure of 7MPa, the pressure of the medium-pressure bypass is controlled to 1.5MPa, and the temperature of the main steam is controlled to 400-500 ℃; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; matching loads of the corresponding combustion engine and the steam turbine: when the gas turbine load is locked, after the gas turbine load is locked, the gas turbine load is continuously increased, after the gas turbine load is increased to 80MW, the gas turbine load is finally increased to 420MW, and then the gas turbine total load is controlled by the coordination and AGC.
Preferably, the warm start-up includes: after the corresponding combustion engine to be started is fixed in speed, grid connection is performed, at least 35MW load is maintained, and the load of the combustion engine is stable; in the starting process of the combustion engine, the boiler automatically drains water, the high-pressure bypass control pressure is 8.0MPa, and the medium-pressure bypass pressure is controlled to be 1.5MPa; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; and after the load of the gas turbine is increased to 80MW, the load of the gas turbine is increased to 420MW, and then the coordination and AGC control are put into.
Preferably, the hot start comprises: after the corresponding combustion engine to be started is fixed in speed, grid connection is carried out, and 60MW load is maintained; in the starting process of the combustion engine, the boiler automatically drains water, the high-pressure bypass control pressure is 8.0MPa, and the medium-pressure bypass pressure is controlled to be 1.6MPa; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; and (3) performing load matching control on the gas turbine and the steam turbine, and after the gas turbine is up to 80MW, finally, putting into coordination and AGC control after the gas turbine is up to 420MW of total load of the gas turbine.
Preferably, the two-to-one gas turbine combined cycle unit comprises a first gas turbine and a second gas turbine, and further comprises 2 waste heat boilers and 1 steam turbine generator unit, wherein the start and stop processes of the units are executed according to the sequential control logic requirements of APS self-adaptive start and stop.
Preferably, the automatic control module of the APS system comprises bypass full-automatic control, drainage full-automatic control, start steam exhaust automatic control, start and load lifting automatic control of each combustion engine, start and load lifting automatic control of the steam engine.
Preferably, the lifting loads of the first combustion engine in the cold start, the warm start and the hot start in the step 1) are not lower than 10MW, 35MW and 60MW respectively.
Preferably, the lifting loads of the second combustion engine in the step 1) for cold start, warm start and hot start are not lower than 10MW, 35MW and 60MW respectively.
Preferably, each combustion engine extinguishes after the combustion engine is down loaded to a shutdown load of <15 MW.
The beneficial effects are that: the automatic function of periodic rotation work of different units in the group operation process can be realized; the optimization of an automatic control system of the unit is realized, and the automatic adjustment of the automatic control system is improved; the two gas generator sets are completed without manual operation, and only the lifting load of the gas engine is controlled in the starting and stopping process according to the signal met by the lifting load condition of the gas engine, so that the efficiency is improved, the misoperation is reduced, and the lifting load control efficiency is improved.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the present invention is not limited to the following examples.
The invention relates to an APS self-adaptive start-stop control method of a two-to-one gas turbine combined cycle unit, which comprises a first gas turbine, a second gas turbine and an automatic control module of an APS system, wherein the automatic control module is used for realizing automatic control of preparation, starting and stopping before starting of the first gas turbine and the second gas turbine;
the control method comprises cold start, warm start and hot start, wherein a first gas turbine and/or a second gas turbine start condition signal and a gas turbine lifting load condition signal are obtained before the cold start, the warm start and the hot start; each start corresponds to a one-drag-one start mode and a two-drag-one start mode,
firstly, according to a selected starting mode of the two-to-one combined cycle unit and a lifting load condition signal of a combustion engine, controlling a corresponding combustion engine to lift load in a starting process to a unit starting target value;
then, according to the lifting load condition signals of the combustion engine, the automatic control module controls the first combustion engine and/or the second combustion engine to reduce the load to the AGC lower limit value, the first combustion engine and/or the second combustion engine is/are subjected to primary frequency modulation and exit, the auxiliary steam source is switched, the combustion engine is subjected to load reduction to the shutdown load, the load is less than 15MW, the combustion engines are used for extinguishing fire, the waste heat boiler is stopped for supplying water at high, medium and low pressure, the steam bypasses are closed for 15min, the condensing water heater is stopped, the condensing water is stopped, the waste heat boiler outlet flue gas baffle is closed, and the APS shutdown step sequence is completed.
In a preferred embodiment, the start-up procedure comprises:
step 1) acquiring a fuel engine starting condition signal and a load rising condition signal of each fuel engine; the lifting loads of the first combustion engine with cold start, warm start and hot start are respectively not lower than 10MW, 35MW and 60MW; the lifting loads of the second combustion engine with cold start, warm start and hot start are respectively not lower than 10MW, 35MW and 60MW;
step 2) obtaining automatic switching condition signals according to lifting load condition signals of a first gas turbine and a second gas turbine, wherein the automatic switching condition signals comprise automatic state switching condition signals and automatic state exiting condition signals, lifting loads of the first gas turbine and the second gas turbine are controlled in a starting and stopping process according to the lifting load condition signals and the automatic switching condition signals of the first gas turbine, and the lifting load condition signals of the first gas turbine comprise a starting load increasing condition signal and a lifting load condition signal so as to control lifting loads of the first gas turbine and the second gas turbine in the starting and stopping process;
step 3) according to the selected starting mode of the two-to-one combined cycle unit, the lifting load condition signal of the gas turbine, the automatic state input condition signal of the first gas turbine and/or the second gas turbine, and the lifting load of the corresponding gas turbine in the starting process is controlled: if the selected starting mode of the two-to-one combined cycle unit is a one-to-one starting mode, controlling the load of the corresponding combustion engine to rise to a one-to-one unit starting target value in the starting process according to the automatic state input condition signal of the corresponding combustion engine and the initial load increasing condition signal of the corresponding combustion engine serving as a first starting stage; if the selected starting mode of the two-to-one combined cycle unit is a two-to-one starting mode, according to the automatic state input condition signals of the first gas turbine and the second gas turbine, the first gas turbine is used as a first starting initial load increasing condition signal and the second gas turbine is used as a second starting initial load increasing condition signal, and the loads of the first gas turbine and the second gas turbine are controlled to rise to the two-to-one unit starting target value in the starting process.
In a preferred embodiment, the cold start comprises: after the corresponding combustion engine to be started is fixed in speed, grid connection is carried out, and at least 10MW load is maintained; when the load of the combustion engine is stable, the high-pressure bypass is fully opened, the control pressure of the medium-pressure bypass is 0.6-1.0MPa, after the lower wall temperature of the high-pressure steam drum is more than 120 ℃, the high-pressure bypass is cut to control pressure of 7MPa, the pressure of the medium-pressure bypass is controlled to 1.5MPa, and the temperature of the main steam is controlled to 400-500 ℃; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; matching loads of the corresponding combustion engine and the steam turbine: when the gas turbine load is locked, after the gas turbine load is locked, the gas turbine load is continuously increased, after the gas turbine load is increased to 80MW, the gas turbine load is finally increased to 420MW, and then the gas turbine total load is controlled by the coordination and AGC.
Specific examples: the specific steps of the APS start procedure load control strategy are as follows:
after the first combustion engine is started, determining a target load according to the temperature of a cylinder (cold start, warm start and hot start): in a one-to-one cold start mode, after the steam turbine is put into pressure control, the steam turbine runs normally, after the stress is normal, the first gas turbine is added to 80MW for 50 minutes and then is added to 420MW continuously, and APS is finished;
under cold state starting in a two-to-one starting mode, after the gas turbine is put into pressure control, the load of the gas turbine is kept unchanged, after the second gas turbine is started, the load tracks the first gas turbine, after the parallel operation of the second gas turbine is completed, the first gas turbine and the second gas turbine are synchronously loaded to 80MW respectively, after the gas turbine and the second gas turbine are warmed up for 50 minutes, the gas turbine and the second gas turbine are then added to 420MW, and APS is finished;
in a preferred embodiment, the warm start-up includes: after the corresponding combustion engine to be started is fixed in speed, grid connection is performed, at least 35MW load is maintained, and the load of the combustion engine is stable; in the starting process of the combustion engine, the boiler automatically drains water, the high-pressure bypass control pressure is 8.0MPa, and the medium-pressure bypass pressure is controlled to be 1.5MPa; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; and after the load of the gas turbine is increased to 80MW, the load of the gas turbine is increased to 420MW, and then the coordination and AGC control are put into.
Such as: under the medium-temperature start of one-to-one starting mode, after the steam turbine is put into pressure control, the steam turbine operates normally, after the stress is normal, the fuel engine keeps 80MW warm for 40 minutes and then continues to 420MW, and APS ends;
under the medium-temperature start of the two-to-one start mode, after the gas turbine is connected with the grid, the load of the first gas turbine is kept unchanged, the gas turbine is waited for the end of the parallel gas of the second gas turbine, meanwhile, the warm-up time of the gas turbine is more than 40 minutes, the load is increased to 420MW, and the APS is ended;
in a preferred embodiment, the hot start comprises: after the corresponding combustion engine to be started is fixed in speed, grid connection is carried out, and 60MW load is maintained; in the starting process of the combustion engine, the boiler automatically drains water, the high-pressure bypass control pressure is 8.0MPa, and the medium-pressure bypass pressure is controlled to be 1.6MPa; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; and (3) performing load matching control on the gas turbine and the steam turbine, and after the gas turbine is up to 80MW, finally, putting into coordination and AGC control after the gas turbine is up to 420MW of total load of the gas turbine.
Such as: under the hot start in the two-to-one starting mode, the gas turbine keeps the 80MW load unchanged after the gas turbine is connected with the power grid, and the gas turbine is connected with the power grid; the engine was warmed up for 30 minutes and then continued to be loaded to 420MW.
In the preferred embodiment mode, the two-to-one gas turbine combined cycle unit comprises a first gas turbine and a second gas turbine, and also comprises 2 waste heat boilers and 1 steam turbine generator unit, wherein the start and stop processes of the units are executed according to the sequential control logic requirements of APS self-adaptive start and stop. The automatic control module of the APS system comprises bypass full-automatic control, drainage full-automatic control, start steam exhaust automatic control, start and load lifting automatic control of each fuel engine, and start and load lifting automatic control of the steam engine.
Finally, it should be noted that the invention is not limited to the above embodiments, but that many variants are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.

Claims (10)

1. An APS self-adaptive start-stop control method for a two-to-one combined cycle unit of a gas turbine is characterized by comprising the following steps of: the two-to-one combined cycle unit comprises an automatic control module of a first gas turbine, a second gas turbine and an APS system, wherein the automatic control module is used for realizing automatic control of preparation, starting and stopping before starting the first gas turbine and the second gas turbine;
the control method comprises cold start, warm start and hot start, wherein a first gas turbine and/or a second gas turbine start condition signal and a gas turbine lifting load condition signal are obtained before the cold start, the warm start and the hot start; each starting corresponds to a one-to-one starting mode and a two-to-one starting mode;
firstly, according to a selected starting mode of the two-to-one combined cycle unit and a lifting load condition signal of a combustion engine, controlling a corresponding combustion engine to lift load in a starting process to a unit starting target value;
then, according to the lifting load condition signals of the gas turbine, the automatic control module controls the first gas turbine and/or the second gas turbine to reduce the load to the AGC lower limit value, the first gas turbine and/or the second gas turbine is/are subjected to primary frequency modulation and exit, the auxiliary gas source is switched, the gas turbine is subjected to load reduction to the stop load, the gas turbines are used for extinguishing fire, the waste heat boiler is stopped for supplying water at high, medium and low pressure, the steam bypasses are closed for 15min, the condensate water heater is stopped, the condensate water is stopped, the waste heat boiler outlet flue gas baffle is closed, and the APS stop step sequence is completed.
2. The APS self-adaptive start-stop control method for the two-to-one combined cycle unit of the gas turbine engine, which is characterized by comprising the following steps of: the starting process comprises the following steps:
step 1) acquiring a fuel engine starting condition signal and a load rising condition signal of each fuel engine;
step 2) obtaining automatic switching condition signals according to lifting load condition signals of a first gas turbine and a second gas turbine, wherein the automatic switching condition signals comprise automatic state switching condition signals and automatic state exiting condition signals, lifting loads of the first gas turbine and the second gas turbine are controlled in a starting and stopping process according to the lifting load condition signals and the automatic switching condition signals of the first gas turbine, and the lifting load condition signals of the first gas turbine comprise a starting load increasing condition signal and a lifting load condition signal so as to control lifting loads of the first gas turbine and the second gas turbine in the starting and stopping process;
step 3) according to the selected starting mode of the two-to-one combined cycle unit, the lifting load condition signal of the gas turbine, the automatic state input condition signal of the first gas turbine and/or the second gas turbine, and the lifting load of the corresponding gas turbine in the starting process is controlled: if the selected starting mode of the two-to-one combined cycle unit is a one-to-one starting mode, controlling the load of the corresponding combustion engine to rise to a one-to-one unit starting target value in the starting process according to the automatic state input condition signal of the corresponding combustion engine and the initial load increasing condition signal of the corresponding combustion engine serving as a first starting stage; if the selected starting mode of the two-to-one combined cycle unit is a two-to-one starting mode, according to the automatic state input condition signals of the first gas turbine and the second gas turbine, the first gas turbine is used as a first starting initial load increasing condition signal and the second gas turbine is used as a second starting initial load increasing condition signal, and the loads of the first gas turbine and the second gas turbine are controlled to rise to the two-to-one unit starting target value in the starting process.
3. The APS adaptive start-stop control method of a two-to-one combined cycle unit of a two-cycle gas turbine according to claim 1, wherein: the cold start includes: after the corresponding combustion engine to be started is fixed in speed, grid connection is carried out, and at least 10MW load is maintained; when the load of the combustion engine is stable, the high-pressure bypass is fully opened, the control pressure of the medium-pressure bypass is 0.6-1.0MPa, after the lower wall temperature of the high-pressure steam drum is more than 120 ℃, the high-pressure bypass is cut to control pressure of 7MPa, the pressure of the medium-pressure bypass is controlled to 1.5MPa, and the temperature of the main steam is controlled to 400-500 ℃; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; matching loads of the corresponding combustion engine and the steam turbine: when the gas turbine load is locked, after the gas turbine load is locked, the gas turbine load is continuously increased, after the gas turbine load is increased to 80MW, the gas turbine load is finally increased to 420MW, and then the gas turbine total load is controlled by the coordination and AGC.
4. The APS adaptive start-stop control method of a two-to-one combined cycle unit of a two-cycle gas turbine according to claim 1, wherein: the warm state start-up includes: after the corresponding combustion engine to be started is fixed in speed, grid connection is performed, at least 35MW load is maintained, and the load of the combustion engine is stable; in the starting process of the combustion engine, the boiler automatically drains water, the high-pressure bypass control pressure is 8.0MPa, and the medium-pressure bypass pressure is controlled to be 1.5MPa; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; and after the load of the gas turbine is increased to 80MW, the load of the gas turbine is increased to 420MW, and then the coordination and AGC control are put into.
5. The APS adaptive start-stop control method of a two-to-one combined cycle unit of a two-cycle gas turbine according to claim 1, wherein: the hot start includes: after the corresponding combustion engine to be started is fixed in speed, grid connection is carried out, and 60MW load is maintained; in the starting process of the combustion engine, the boiler automatically drains water, the high-pressure bypass control pressure is 8.0MPa, and the medium-pressure bypass pressure is controlled to be 1.6MPa; after the speed of the steam turbine is fixed at 3000rpm, the load is 20MW; and (3) performing load matching control on the gas turbine and the steam turbine, and after the gas turbine is up to 80MW, finally, putting into coordination and AGC control after the gas turbine is up to 420MW of total load of the gas turbine.
6. The APS adaptive start-stop control method of a two-to-one combined cycle unit according to any one of claims 1 to 5, wherein: the two-to-one gas turbine combined cycle unit comprises a first gas turbine, a second gas turbine, 2 waste heat boilers and 1 steam turbine generator unit, and is executed according to the sequential control logic requirement of APS self-adaptive start and stop in the start and stop process of the unit.
7. The APS adaptive start-stop control method of a two-to-one combined cycle unit of a two-cycle gas turbine according to claim 1, wherein: the automatic control module of the APS system comprises bypass full-automatic control, drainage full-automatic control, start steam exhaust automatic control, start and load lifting automatic control of each fuel engine, and start and load lifting automatic control of the steam engine.
8. The APS adaptive start-stop control method of a two-to-one combined cycle unit of a two-cycle gas turbine according to claim 2, wherein: the lifting loads of the first combustion engine with cold start, warm start and hot start in the step 1) are respectively not lower than 10MW, 35MW and 60MW.
9. The APS adaptive start-stop control method of a two-to-one combined cycle unit of a two-cycle gas turbine according to claim 2, wherein: and step 1), lifting loads of the second combustion engine with cold start, warm start and hot start are respectively not lower than 10MW, 35MW and 60MW.
10. The APS adaptive start-stop control method of a two-to-one combined cycle unit of a two-cycle gas turbine according to claim 1, wherein: and after the load of the combustion engine is reduced to the stop load of <15MW, extinguishing the fire of each combustion engine.
CN202311231299.7A 2023-09-22 2023-09-22 APS self-adaptive start-stop control method for two-to-one gas turbine combined cycle unit Pending CN117307277A (en)

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