CN113746115B - Control method for participation of pumped storage unit in electric power frequency modulation market - Google Patents
Control method for participation of pumped storage unit in electric power frequency modulation market Download PDFInfo
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- 238000010248 power generation Methods 0.000 claims abstract description 35
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/003—Systems for storing electric energy in the form of hydraulic energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- 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
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- Combustion & Propulsion (AREA)
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- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to a control method for a pumped storage unit to participate in an electric frequency modulation market, which belongs to the field of automatic control of the pumped storage unit, and aims at solving the problem that the existing control method can not meet the requirement of the pumped storage unit on the electric frequency modulation market, and the control method for the pumped storage unit to participate in the electric frequency modulation market comprises the following steps: entering an electric power frequency modulation market mode; setting a speed regulator parameter and a control threshold value, so that the speed regulator tracks and responds to an AGC target instruction; obtaining the value of a comprehensive index K related to the parameters of the speed regulator, and calculating the average value K' of K in the past unit time; when K 'is less than the control threshold, decomposing K', adjusting parameters of the speed regulator, and returning to the step 2; and when the K' is not less than the control threshold value, maintaining the parameters of the speed regulator until the regulation and control process is finished. According to the invention, based on the AGC target instruction, the side-down power generation instruction is scheduled, and the comprehensive index K is calculated to feed back and adjust the parameters of the speed regulator, so that the pumped storage unit meets the electric power frequency modulation market requirement.
Description
Technical Field
The invention belongs to the field of automatic control of a pumped storage unit, and particularly relates to a control method for the pumped storage unit to participate in an electric power frequency modulation market.
Background
The pumped storage unit has two basic functions of pumping water and generating electricity. The machine set operates as a water turbine at the peak load of the electric power system, the opening degree of a guide vane of the water turbine is adjusted through a speed regulator system, potential energy of water is converted into mechanical energy of rotation of the machine set, and then the mechanical energy is converted into electric energy through a generator; when the load of the electric power system is low, the electric energy is used for pumping water from the lower reservoir to the upper reservoir, the opening of the guide vane is automatically adjusted according to the lift of the water pump through the automatic adjustment of the speed regulator system, and the electric energy is converted into potential energy of water to be stored.
Because the operation working condition of the pumped storage power station is complex, different working conditions must meet certain conditions to be converted, different sets do not allow mutually exclusive working conditions to appear, the AGC of the pumped storage power station needs to consider various safety, boundary conditions and other limiting factors which are far more complex than those of a conventional hydropower station, the control of an AGC scheduling layer of a general pumped storage power station adopts a whole station grouping mode, the communication data volume of the power station and an AGC master station server at a scheduling side can be reduced, and meanwhile, the safety locking logic of the scheduling side about the control of the pumped AGC is greatly simplified. The existing control method is a simpler control method, the benefits of the pumped storage unit in the electric power frequency modulation market are not considered, even the current pumped storage unit does not participate in the electric power frequency modulation market, therefore, the existing control method cannot adapt to efficient or high-benefit operation in the electric power frequency modulation market environment, the competitiveness of the pumped storage unit in the electric power frequency modulation market field is affected, and the economic benefit is affected, so that the problem to be solved by the person in the field at present is solved urgently.
Disclosure of Invention
Aiming at the problem that the existing control method cannot meet the requirement of efficient or high-yield operation of the pumped storage unit in the field of the electric frequency modulation market, the invention provides the control method for the pumped storage unit to participate in the electric frequency modulation market, which can improve the competitiveness of the pumped storage unit in the field of the electric frequency modulation market and further improve the economic benefit.
The invention adopts the following technical scheme: a control method for a pumped storage unit to participate in an electric power frequency modulation market comprises the following steps:
step 1, initializing parameters of an AGC functional module, setting locking conditions of the AGC functional module and an AGC target instruction, enabling each pumped storage unit to receive an AGC power generation load instruction issued by a dispatching side based on the AGC target instruction, so that the dispatching side remotely controls a single pumped storage unit to generate power and enter an electric frequency modulation market mode;
step 2, setting parameters of a speed regulator and control thresholds related to the parameters of the speed regulator in each pumped storage unit through a monitoring system, so that the speed regulator tracks and responds to an AGC target instruction;
step 3, calculating and evaluating AGC regulation performance according to the parameters of the speed regulator set in the step 2, obtaining the value of a comprehensive index K related to the parameters of the speed regulator, wherein the comprehensive index K is used for evaluating an electric power frequency modulation market and calculating an average value K' of K in unit time in the past;
step 4, executing step 5 when K '< control threshold value, and executing step 6 when K' > exceeds control threshold value;
step 5, decomposing K', adjusting parameters of the speed regulator according to the K value, and returning to the step 2;
and 6, executing to maintain the parameters of the existing speed regulator until the regulation and control process is finished.
According to the invention, the pumped storage units can be controlled respectively based on the AGC target instruction through the dispatching side lower power generation instruction, and the parameters of the speed regulators are adjusted through calculating the comprehensive index K feedback of the AGC in the electric frequency modulation market, so that each speed regulator can be in the optimal state in the electric frequency modulation market, and further each pumped storage unit can be operated efficiently, thereby improving the competitive power of each pumped storage unit in the electric frequency modulation market quotation and improving the economic benefit.
Further, in step 1, the locking condition is:
(1) The LCU of the pumped storage unit is in a normal state;
(2) The pump storage unit has no accident;
(3) The pumped storage unit is in an automatic tracking and adjusting state;
(4) The pumped storage unit communication is in a normal state.
The setting of the locking condition can ensure that each pumped storage unit can track the instruction of the AGC functional module, and effective regulation and control are realized.
The more visual control information can be obtained through the AGC power generation load instruction, and whether the organic unit is in an abnormal state or not is conveniently detected.
Further, the method further comprises the step 1.1 of detecting the system frequency through the detection module, and when the system frequency exceeds the lower limit value of high reduction force or low Zhou Qiebeng, the dispatching side issues AGC power generation load of 0, so that power generation shutdown is realized, the operation is ensured to be effective, and major accidents are prevented.
Further, the method further comprises step 1.2 of detecting the water level by the detection module:
when the upper warehouse low water level or the lower warehouse high water level and the AGC power generation load is more than or equal to 10MW, the scheduling side sends the AGC power generation load=0 to realize the shutdown function;
when the upper warehouse high water level or the lower warehouse low water level and the AGC power generation load is less than or equal to 30MW, the scheduling side issues AGC power generation load=0, and the shutdown function is realized, so that the operation is ensured to be effective, and serious accidents are prevented.
Further, in step 3, the comprehensive index K calculation process includes adjusting the rate K 1 Calculate response time K 2 Calculation and adjustment accuracy K 3 The calculation is as follows:
regulating rate K 1 =min [2, actual adjustment rate/standard adjustment rate]The standard regulating speed is 10% Pe/min, and 10% Pe/min means the capacity of regulating the load of the pumped storage unit every minute after the AGC power generation load command is issued, namely 10% rated load is regulated every minute;
response time K 2 Response delay time t=1% d Standard response delay time, the standard response delay time is 5min; response delay time T d Time t for receiving power generation load instruction under dispatching side for AGC functional module 0 The AGC functional module detects the beginning change of the power of the pumped storage unit, and the change amplitude crosses the response hysteresis dead zone allowed by the active power and is no longer returned in trend at the time t 1 Time difference between;
adjusting accuracy K 3 =1-adjustment errorStandard adjustment tolerance, standard adjustment tolerance 1.5% pe; wherein the method comprises the steps of The grid-connected capacity is the rated power of the pumped storage unit, and the active power output of the power station at the end of the period is the active power output of the pumped storage unit when responding to the AGC power generation load command and entering the steady-state dead zone regulated by the AGC;
comprehensive index k=max [0.01, (2×k) 1 +K 2 +K 3 )/4]。
The parameters related to the K value are mainly PID proportion element K P PID integration link K d PID differentiation element K I Three parameters, by adjusting K P And K d To adjust the adjustment rate K 1 By adjusting K P To adjust the response time K 2 By adjusting K P And K I To adjust the adjustment accuracy K 3 。
The invention has the beneficial effects that: according to the invention, the pumped storage units can be controlled respectively based on the AGC target instruction through the dispatching side lower power generation instruction, and the parameters of the speed regulators are adjusted through calculating the comprehensive index K feedback of the AGC in the electric frequency modulation market, so that each speed regulator can be in the optimal state in the electric frequency modulation market, and further each pumped storage unit can be operated efficiently, thereby improving the competitive power of each pumped storage unit in the electric frequency modulation market quotation and improving the economic benefit.
Drawings
FIG. 1 is a flow chart of an embodiment;
FIG. 2 is a graph of pump storage unit operating power versus time;
FIG. 3 is a response graph of a pump accumulator set number 1 operating for half an hour under AGC conditions;
FIG. 4 is a graph of response of a pump accumulator set number 1 modified with K for half an hour under AGC conditions.
Detailed Description
The technical solutions of the embodiments of the present invention will be explained and illustrated below with reference to the drawings of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all the embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present invention.
This example is given as an example of a Ning power station located in the Fenghua region of Ningbo city in Zhejiang province.
The control method for the pumped storage unit to participate in the electric power frequency modulation market in the embodiment is shown in fig. 1, and comprises the following steps:
step 1, initializing parameters of an AGC functional module, setting locking conditions of the AGC functional module and an AGC target instruction, enabling a single pumped storage unit to receive an AGC power generation load instruction issued by a dispatching side based on the AGC target instruction, so that the dispatching side remotely controls the single pumped storage unit to generate power and enter an electric frequency modulation market mode;
the locking condition is as follows:
(1) The LCU of the pumped storage unit is in a normal state;
(2) The pump storage unit has no accident;
(3) The pumped storage unit is in an automatic tracking and adjusting state;
(4) The communication of the pumped storage unit is in a normal state;
the locking condition is set to ensure that each pumped storage unit can track the command of the AGC functional module, so that effective regulation and control are realized;
and 1.1, detecting the system frequency through a detection module, and when the system frequency exceeds the lower limit value of high decreasing output or low Zhou Qiebeng, issuing AGC power generation load of 0 by a dispatching side to realize power generation shutdown so as to ensure effective operation and prevent major accidents.
Step 1.2, detecting the water level by a detection module:
when the upper warehouse low water level or the lower warehouse high water level and the AGC power generation load is more than or equal to 10MW, the scheduling side sends the AGC power generation load=0 to realize the shutdown function;
when the upper water level or the lower water level is high and the AGC power generation load is less than or equal to 30MW, the scheduling side transmits AGC power generation load=0, so that a shutdown function is realized, the operation is ensured to be effective, and major accidents are prevented;
the more visual control information can be obtained through the AGC power generation load instruction, so that whether the organic unit is in an abnormal state or not can be conveniently detected;
step 2, setting parameters of a speed regulator and control thresholds related to the parameters of the speed regulator in each pumped storage unit through a monitoring system, so that the speed regulator tracks and responds to an AGC target instruction; the control threshold in this embodiment is set to 1.5;
step 3, calculating and evaluating AGC regulation performance according to the parameters of the speed regulator set in the step 2, obtaining the value of a comprehensive index K related to the parameters of the speed regulator, wherein the comprehensive index K is used for evaluating an electric power frequency modulation market and calculating an average value K' of K in unit time in the past; in this embodiment, the unit time is 1h;
the comprehensive index K calculation process comprises the adjustment of the rate K 1 Calculate response time K 2 Calculation and adjustment accuracy K 3 The calculation is as follows:
regulating rate K 1 =min [2, actual adjustment rate/standard adjustment rate]The standard regulating speed is 10% Pe/min, and 10% Pe/min means the capacity of regulating the load of the pumped storage unit every minute after the AGC power generation load command is issued, namely 10% rated load is regulated every minute;
as shown in the figure 2 of the drawings,the actual regulating rate and the standard regulating rate are regulated to be consistent through the regulating device, namely MW/s is converted into MW/min; p (P) s AGC target value for the pumped storage unit; p (P) d A response hysteresis dead zone for AGC control of the pumped storage unit;
response time K 2 Response delay time t=1% d Standard response delay time, the standard response delay time is 5min;
response delay time T d Receiving scheduling side lower power generation load finger for AGC functional moduleTime t of command 0 The AGC functional module detects the beginning change of the power of the pumped storage unit, and the change amplitude crosses the response hysteresis dead zone allowed by the active power and is no longer returned in trend at the time t 1 Time difference between them, T as shown in FIG. 2 d ＝t 1 -t 0 ；
Adjusting accuracy K 3 =1-adjustment error/standard adjustment error allowance, standard adjustment error allowance is 1.5% pe; wherein the method comprises the steps of The grid-connected capacity is the rated power of the pumped storage unit, and the active power output of the power station at the end of the period is the active power output of the pumped storage unit when responding to the AGC power generation load command and entering the steady-state dead zone regulated by the AGC;
comprehensive index k=max [0.01, (2×k) 1 +K 2 +K 3 )/4]；
The governor parameters used in this example are shown in table 1 below.
TABLE 1
| Parameters (parameters) | Setting up |
| Speed regulator model | PSW(S)T-PLC |
| Diameter of main distributing valve | 100mm |
| Rated working oil pressure | 2.50MPa |
| Working power supply | Ac 220V + dc 220V |
| Frequency measurement mode | Residual pressure |
| Perpetual slip coefficient BP | 4％ |
| PID proportion link K P | 0.93 |
| PID integration link K d | 8.9 |
| PID differentiation element K I | 0.63 |
| Dead zone of frequency | ±0.05HZ |
| Dead zone of power | ±3MW |
| Primary frequency modulation amplitude limiting | 10％ |
| Opening restriction | L＝0～100％ |
| Power setting | P＝0～120％PN |
Step 4, executing step 5 when K '< control threshold value, and executing step 6 when K' > exceeds control threshold value;
step 5, decomposing K', adjusting parameters of the speed regulator according to the K value, and returning to the step 2;
among the parameters of the speed regulator, the parameters related to the K value are mainly PID proportion link K P PID integration link K d PID differentiation element K I Three parameters, specifically: by adjusting K P And K d To adjust the adjustment rate K 1 The method comprises the steps of carrying out a first treatment on the surface of the By adjusting K P To adjust the response time K 2 The method comprises the steps of carrying out a first treatment on the surface of the By adjusting K P And K I To adjust the adjustment accuracy K 3 。
And 6, executing to maintain the parameters of the existing speed regulator until the regulation and control process is finished.
According to the invention, the pumped storage units can be controlled respectively based on the AGC target instruction through the dispatching side lower power generation instruction, and the parameters of the speed regulators are adjusted through calculating the comprehensive index K feedback of the AGC in the electric frequency modulation market, so that each speed regulator can be in the optimal state in the electric frequency modulation market, and further each pumped storage unit can be operated efficiently, thereby improving the competitive power of each pumped storage unit in the electric frequency modulation market quotation and improving the economic benefit.
Frequency modulation mileage ordering price = frequency modulation mileage quote/K, so it can be seen that the higher the K value, the better the competitiveness of the pumped storage unit in the electricity frequency modulation market.
The response curve graph of the No. 1 pumped storage unit running for half an hour under the AGC working condition is shown in fig. 3, and it can be seen from the graph that the No. 1 pumped storage station runs for 31 minutes and 20 seconds in total under the AGC power generation mode, participates in the AGC regulation of the Zhejiang power grid for 19 times, the total regulation time is 24 minutes and 40 seconds, the total regulation mileage is 105.58MW, the average response lag time is 5.63 seconds, the average regulation error is 0.96% Pe, the average regulation rate is 17.34% Pe/min, and the average value K' of the comprehensive index K is 1.2023.
As the average value K' is 1.2023 and smaller than 1.5, when the unit 1 is judged to run in the AGC frequency modulation mode, the regulating speed is lower, so that the parameter K of the speed regulator is modified P And K d Repair and repairThe modified electric power station No. 1 unit runs automatically for 37 minutes and 48 seconds (the modified running curve is shown in fig. 4) in the AGC power generation mode, participates in the AGC regulation of the Zhejiang power grid for 18 times, the total regulating time is 7 minutes and 55 seconds, the total regulating mileage is 104.37MW, the average response lag time is 2.38 seconds, the average regulating error is 1.69%, the average regulating speed is 34.40%Pe/min, and the average value K' of the comprehensive index K is 1.9365.
While the invention has been described in terms of specific embodiments, it will be appreciated by those skilled in the art that the invention is not limited thereto but includes, but is not limited to, those shown in the drawings and described in the foregoing detailed description. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (1)
1. A control method for a pumped storage unit to participate in an electric power frequency modulation market is characterized by comprising the following steps:
step 1, initializing parameters of an AGC functional module, setting locking conditions of the AGC functional module and an AGC target instruction, enabling each pumped storage unit to receive an AGC power generation load instruction issued by a dispatching side based on the AGC target instruction, so that the dispatching side remotely controls a single pumped storage unit to generate power and enter an electric frequency modulation market mode; the locking condition is as follows:
(1) The LCU of the pumped storage unit is in a normal state;
(2) The pump storage unit has no accident;
(3) The pumped storage unit is in an automatic tracking and adjusting state;
(4) The communication of the pumped storage unit is in a normal state;
step 1.1, detecting the system frequency through a detection module, and when the system frequency exceeds the lower limit value of high circumference decreasing force or low Zhou Qiebeng, issuing AGC power generation load to be 0 by a dispatching side to realize power generation shutdown;
step 1.2, detecting the water level by a detection module:
when the upper warehouse low water level or the lower warehouse high water level and the AGC power generation load is more than or equal to 10MW, the scheduling side sends the AGC power generation load=0 to realize the shutdown function;
when the upper water level or the lower water level is high and the AGC power generation load is less than or equal to 30MW, the scheduling side sends the AGC power generation load=0 to realize the shutdown function;
step 2, setting parameters of a speed regulator and control thresholds related to the parameters of the speed regulator in each pumped storage unit through a monitoring system, so that the speed regulator tracks and responds to an AGC target instruction;
step 3, calculating and evaluating AGC regulation performance according to the parameters of the speed regulator set in the step 2, obtaining the value of a comprehensive index K related to the parameters of the speed regulator, wherein the comprehensive index K is used for evaluating an electric power frequency modulation market and calculating an average value K' of K in unit time in the past; the comprehensive index K calculation process comprises the adjustment of the rate K 1 Calculate response time K 2 Calculation and adjustment accuracy K 3 The calculation is as follows:
regulating rate K 1 =min [2, actual adjustment rate/standard adjustment rate]The standard regulating rate is 10% Pe/min;
response time K 2 Response delay time t=1% d Standard response delay time, the standard response delay time is 5min;
adjusting accuracy K 3 =1-adjustment error/standard adjustment error allowance, standard adjustment error allowance is 1.5% pe; wherein the method comprises the steps of
Comprehensive index k=max [0.01, (2×k) 1 +K 2 +K 3 )/4]；
Step 4, executing step 5 when K '< control threshold value, and executing step 6 when K' > exceeds control threshold value;
step 5, decomposing K', adjusting parameters of the speed regulator according to the K value, and returning to the step 2; by adjusting PID proportion link K P And PID integration link K d To adjust the rate of adjustmentK 1 The method comprises the steps of carrying out a first treatment on the surface of the By adjusting PID proportion link K P To adjust the response time K 2 The method comprises the steps of carrying out a first treatment on the surface of the By adjusting PID proportion link K P And PID differentiation element K I To adjust the adjustment accuracy K 3 ；
And 6, executing to maintain the parameters of the existing speed regulator until the regulation and control process is finished.
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| CN202111053730.4A CN113746115B (en) | 2021-09-09 | 2021-09-09 | Control method for participation of pumped storage unit in electric power frequency modulation market |
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| CN202111053730.4A CN113746115B (en) | 2021-09-09 | 2021-09-09 | Control method for participation of pumped storage unit in electric power frequency modulation market |
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|---|---|
| CN113746115A CN113746115A (en) | 2021-12-03 |
| CN113746115B true CN113746115B (en) | 2024-04-16 |
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| DE3601289A1 (en) * | 1986-01-17 | 1987-07-23 | Siemens Ag | Power regulation of a water-driven machine set |
| CN110165702A (en) * | 2019-05-16 | 2019-08-23 | 科诺伟业风能设备（北京）有限公司 | Total power speed change pump-storage generator primary frequency modulation coordinated control system |
| CN111027177A (en) * | 2019-11-08 | 2020-04-17 | 华中科技大学 | Pumped storage unit frequency modulation parameter optimization method and frequency modulation method |
| CN111092441A (en) * | 2019-11-29 | 2020-05-01 | 江苏方天电力技术有限公司 | Method and system for controlling regional load frequency of pumped storage power station |
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| DE3601289A1 (en) * | 1986-01-17 | 1987-07-23 | Siemens Ag | Power regulation of a water-driven machine set |
| CN110165702A (en) * | 2019-05-16 | 2019-08-23 | 科诺伟业风能设备（北京）有限公司 | Total power speed change pump-storage generator primary frequency modulation coordinated control system |
| CN111027177A (en) * | 2019-11-08 | 2020-04-17 | 华中科技大学 | Pumped storage unit frequency modulation parameter optimization method and frequency modulation method |
| CN111092441A (en) * | 2019-11-29 | 2020-05-01 | 江苏方天电力技术有限公司 | Method and system for controlling regional load frequency of pumped storage power station |
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