CN109066790B - Wind power plant primary frequency modulation and AGC coordination control method based on station control - Google Patents
Wind power plant primary frequency modulation and AGC coordination control method based on station control Download PDFInfo
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Abstract
In the active power control device of the wind power plant accessed in a grid-connected operation centralized manner, a droop frequency adjustment control strategy of the wind power plant power is added; and monitoring the grid-connected point frequency of the wind power plant which is centrally accessed in grid-connected operation in real time, and calculating the primary frequency modulation power target value P of the energy management platform after primary frequency modulation action according to the droop frequency regulation control strategy of the wind power plant power after the grid-connected point frequency exceeds the set primary frequency modulation dead zonePFRThe primary frequency modulation measurement and control system measures the new primary frequency modulation power target value PPFRThe wind power station is redistributed to each wind generating set through the energy management platform, the wind generating sets adjust respective output according to the instructions, and the primary frequency modulation function of the whole wind power station is achieved, so that the primary frequency modulation of the wind power station and AGC control of the wind power station can be coordinated.
Description
Technical Field
The invention belongs to the technical field of wind power, and particularly relates to a primary frequency modulation and AGC coordination control method for a wind power plant based on station control.
Background
In recent years, new energy power generation represented by wind power is rapidly developed, and as late as 2017, wind power and photovoltaic installation in China reach 2.1 hundred million kilowatts and live at the top of the world, wherein the new energy ratio of a northwest power grid reaches 32.8%. The proportion of new energy to the total installed capacity of the power grid is higher and higher. With the continuous increase of the wind power and photovoltaic ratio in a local power grid, the ultrahigh voltage direct current transmission is gradually put into operation, the power grid operation and structure are increasingly complex, and the power balance and frequency modulation difficulty of a power system is continuously increased. The increase of the new energy power generation proportion reduces the installation proportion of the conventional fire and hydroelectric generating set. The primary frequency modulation capacity proportion in the system is reduced, and the influence is caused on the frequency safety of a power grid, so that the frequency modulation capability of a new energy power station needs to be excavated, and the wind power generation field participates in the primary frequency modulation of the power grid, and the early-stage research and pilot test are already carried out on the power grid of partial regions.
At present, a wind power plant is generally put into an AGC (automatic generation control) operation mode, two conditions of AGC load-limited operation and AGC non-load-limited operation exist according to the condition of a regional power grid, the primary frequency modulation performance is greatly different under different AGC operation modes, and the primary frequency modulation performance of the wind power plant can be influenced if the primary frequency modulation is not coordinated with the AGC, so that the wind power plant AGC and the primary frequency modulation need to be coordinated and controlled.
Disclosure of Invention
In order to solve the problems, the invention provides a primary frequency modulation and AGC coordination control method for a wind power plant based on station control, and the invention solves the problem that the primary frequency modulation and AGC cannot be coordinately controlled.
In order to achieve the aim, the primary frequency modulation and AGC coordination control method of the wind power plant based on the station control comprises coordination of a primary frequency modulation measurement and control system and wind field AGC and coordination of the primary frequency modulation measurement and control system and an energy management platform;
the coordination process of the primary frequency modulation measurement and control system and the wind field AGC is as follows: the primary frequency modulation measurement and control system sends primary frequency modulation input and primary frequency modulation action signals to a wind field AGC, and the wind field AGC sends theoretical power, AGC given power and actual power of a wind volume management platform control fan of each energy management platform to the primary frequency modulation measurement and control system;
when the wind field AGC receives primary frequency modulation input and primary frequency modulation action signals at the same time, the transmission of AGC given power to the energy management platform is stopped, and a primary frequency modulation measurement and control system transmits a primary frequency modulation power target value P to the energy management platformPFR(ii) a After the primary frequency modulation action is reset, the primary frequency modulation measurement and control system respectively sends the AGC given power received finally to each energy management platform, and then the wind field AGC normally sends the AGC given power to the energy management platforms.
The coordination process of the primary frequency modulation measurement and control system and the energy management platform is as follows: during the frequency modulation period, the primary frequency modulation measurement and control system transmits a frequency modulation input signal, a frequency modulation action signal and a primary frequency modulation power target value P of the energy management platform to each energy management platformPFRAnd the energy management platform performs frequency modulation according to the received frequency modulation action signal.
Further, when the grid frequency deviation is within the primary frequency modulation dead zone range: the primary frequency modulation measurement and control system does not act, and an AGC given power instruction is sent to each energy platform by a wind field AGC; when the grid frequency deviation exceeds a primary frequency modulation dead zone: the primary frequency modulation measurement and control system sends a primary frequency modulation action signal to the wind field AGC and the energy management platform, the wind field AGC stops sending AGC given power to the energy platform, and the primary frequency modulation measurement and control system sends energy management platform target power P to the energy management platformPFR。
Further, when P isTheoretical power-PActual power≥PRated valueWhen lambda is set, judging the load limit; target power P of each energy management platform at the momentPFRIs calculated by the formula PPFR=PAGC+△PPFC(ii) a When P is presentTheoretical power-PActual power＜PRated valueWhen lambda is set, judging the load is unlimited; target power P of each energy management platform at the momentPFRIs calculated by the formula PPFR= PActual power+△PPFC；
In the above formula: pTheoretical powerThe power which can be generated by the wind power plant under the current wind speed; pActual powerThe actual power of the current wind power plant; lambda is the deviation coefficient of the power which can be generated by the wind power plant under the current wind speed and the actual power of the current wind power plant,generally, 0.05 can be taken; pAGCSetting a power set value for AGC of a wind power plant; delta PPFCThe method is characterized in that the method is a primary frequency modulation regulating quantity of a wind power plant, and lambda is a deviation coefficient of theoretical power and actual power of the wind power plant.
Furthermore, the range of the primary frequency modulation dead zone is 0.05 Hz-0.1 Hz.
Furthermore, the energy management platform receives the frequency modulation action signal and performs frequency modulation in a fast adjustment mode.
Furthermore, a droop frequency adjustment control strategy of wind power plant power is added to an active power control device of a wind power plant which is connected in a grid-connected operation centralized mode.
Compared with the prior art, the method has at least the following beneficial technical effects, and mainly solves the problems that active control and primary frequency modulation of the wind power plant AGC cannot be coordinated and controlled frequently, and the wind power plant AGC and the primary frequency modulation are locked mutually. The method provided by the invention is used for judging whether the wind power plant is in the load limiting working condition, different primary frequency modulation calculation methods are provided aiming at the load limiting and the load unlimited, the wind power plant AGC and the primary frequency modulation can be ensured to normally play functions in the actual operation, and the normal operation of the wind power plant AGC and the primary frequency modulation is ensured.
Drawings
FIG. 1 is a schematic diagram of coordination control of primary frequency modulation and AGC of a wind power plant.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, a wind farm primary frequency modulation and AGC coordinated control method based on station control includes:
coordination of wind field AGC and energy management platform
And the wind field AGC sends AGC given power to each energy management platform, and the energy management platforms feed back actual power of the fan to the wind field AGC.
Coordination of secondary and primary frequency modulation measurement and control system and wind field AGC
The primary frequency modulation measurement and control system is communicated with the wind field AGC, the primary frequency modulation input and primary frequency modulation action signals are sent to the wind field AGC by the primary frequency modulation measurement and control system, and the theoretical power, AGC given power and actual power of the wind volume management platform control fan of each energy management platform are sent to the primary frequency modulation measurement and control system by the wind field AGC.
When the wind field AGC receives primary frequency modulation input and primary frequency modulation action signals at the same time, the transmission of AGC given power to the energy management platform is stopped, and a primary frequency modulation measurement and control system transmits a primary frequency modulation power target value P to the energy management platformPFR. After the primary frequency modulation action is reset, the primary frequency modulation measurement and control system respectively sends the AGC given power received finally to each energy management platform, and then the wind field AGC normally sends the AGC given power to the energy management platforms. Wherein, the primary frequency modulation action returns to the frequency within the dead zone range, and the primary frequency modulation exits.
Coordination of primary frequency modulation measurement and control system and energy management platform
During the frequency modulation (when the wind field AGC receives the primary frequency modulation input and primary frequency modulation action signals, the wind field AGC stops sending AGC given power to the energy management platform, the primary frequency modulation measurement and control system sends a primary frequency modulation power target value PPFR to the energy management platform), the primary frequency modulation measurement and control system sends frequency modulation input signals, frequency modulation action signals and a primary frequency modulation power target value P of the energy management platform to each energy management platformPFR. And the energy management platform receives the frequency modulation action signal and performs frequency modulation in a fast adjustment mode.
After primary frequency modulation action, a primary frequency modulation power target value P of wind power plant energy management platformPFRThe determination method specifically comprises the following steps:
1. when the grid frequency deviation is within the primary frequency modulation dead zone range:
and the primary frequency modulation measurement and control system does not act, and normally sends AGC given power instructions to each energy platform by the wind field AGC.
2. When the frequency deviation of the power grid exceeds a primary frequency modulation dead zone, the primary frequency modulation measurement and control system acts:
the primary frequency modulation measurement and control system sends a primary frequency modulation action signal to the wind field AGC and the energy management platform, the wind field AGC stops sending AGC given power to the energy platform, and the primary frequency modulation measurement and control system sends energy to the energy management platformMeasuring management platform target power PPFRThe following two cases are distinguished:
(1) under the wind-powered electricity generation field limit load operating mode:
when P is presentTheoretical power-PActual power≥PRated valueWhen lambda is set, judging the load limit;
the target power of each energy management platform is PPFR=PAGC+△PPFC
(2) Unlimited load condition
When P is presentTheoretical power-PActual power＜PRated valueLambda, judged as unlimited load
The target power of each energy management platform is PPFR= PActual power+△PPFC
In the above formula: pTheoretical powerThe power which can be generated by the wind power plant under the current wind speed; generally, 0.05 can be taken; pActual powerThe actual power of the current wind power plant; pAGCSetting a power set value for AGC of a wind power plant; delta PPFCThe method is characterized in that the method is a primary frequency modulation regulating quantity of a wind power plant, lambda is a deviation coefficient of power which can be generated by the wind power plant under the current wind speed and the actual power of the current wind power plant, and lambda is generally 0.05.
In the active power control device of the wind power plant accessed in a grid-connected operation centralized manner, a droop frequency adjustment control strategy of the wind power plant power is added; and monitoring the grid-connected point frequency of the wind power plant which is centrally accessed in grid-connected operation in real time, and calculating the primary frequency modulation power target value P of the energy management platform after primary frequency modulation action according to the droop frequency regulation control strategy of the wind power plant power after the grid-connected point frequency exceeds the set primary frequency modulation dead zonePFRThe primary frequency modulation measurement and control system measures the new primary frequency modulation power target value PPFRThe wind power station is redistributed to each wind generating set through the energy management platform, the wind generating sets adjust respective output according to the instructions, and the primary frequency modulation function of the whole wind power station is achieved, so that the primary frequency modulation of the wind power station and AGC control of the wind power station can be coordinated.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. A wind power plant primary frequency modulation and AGC coordination control method based on station control is characterized by comprising coordination of a primary frequency modulation measurement and control system and a wind field AGC and coordination of the primary frequency modulation measurement and control system and an energy management platform;
the coordination process of the primary frequency modulation measurement and control system and the wind field AGC is as follows: the primary frequency modulation measurement and control system sends primary frequency modulation input and primary frequency modulation action signals to a wind field AGC, and the wind field AGC sends theoretical power, AGC given power and actual power of a wind volume management platform control fan of each energy management platform to the primary frequency modulation measurement and control system;
when the wind field AGC receives primary frequency modulation input and primary frequency modulation action signals at the same time, the transmission of AGC given power to the energy management platform is stopped, and a primary frequency modulation measurement and control system transmits a primary frequency modulation power target value P to the energy management platformPFR(ii) a After the primary frequency modulation action is reset, the primary frequency modulation measurement and control system respectively sends the AGC given power received finally to each energy management platform, and then the wind field AGC sends the AGC given power to the energy management platforms;
the coordination process of the primary frequency modulation measurement and control system and the energy management platform is as follows: during the frequency modulation period, the primary frequency modulation measurement and control system transmits a frequency modulation input signal, a frequency modulation action signal and a primary frequency modulation power target value P of the energy management platform to each energy management platformPFRAnd the energy management platform performs frequency modulation according to the received frequency modulation action signal.
2. The coordination control method for primary frequency modulation and AGC of the wind power plant based on the station control according to claim 1, characterized in that when the grid frequency deviation is within a primary frequency modulation dead zone range: the primary frequency modulation measurement and control system does not act, and an AGC given power instruction is sent to each energy platform by a wind field AGC; when the grid frequency deviation exceeds a primary frequency modulation dead zone: the primary frequency modulation measurement and control system sends a primary frequency modulation action signal to a wind field AGC and energy management platformThe wind field AGC stops sending AGC given power to the energy platform, and the primary frequency modulation measurement and control system sends energy management platform target power P to the energy management platformPFR。
3. The wind power plant primary frequency modulation and AGC coordination control method based on station control according to claim 2, characterized in that when P isTheoretical power-PActual power≥PRated valueWhen lambda is set, judging the load limit; target power P of each energy management platform at the momentPFRIs calculated by the formula PPFR=PAGC+△PPFC；
When P is presentTheoretical power-PActual power＜PRated valueWhen lambda is set, judging the load is unlimited; target power P of each energy management platform at the momentPFRIs calculated by the formula PPFR= PActual power+△PPFC；
In the above formula: pTheoretical powerThe power which can be generated by the wind power plant under the current wind speed; pActual powerThe actual power of the current wind power plant; lambda is the deviation coefficient of the power which can be generated by the wind power plant at the current wind speed and the actual power of the current wind power plant, and is taken as 0.05; pAGCSetting a power set value for AGC of a wind power plant; delta PPFCAnd adjusting the primary frequency modulation adjustment quantity for the wind power plant.
4. The wind power plant primary frequency modulation and AGC coordinated control method based on the station control according to claim 2, characterized in that a primary frequency modulation dead zone range is 0.05 Hz-0.1 Hz.
5. The wind power plant primary frequency modulation and AGC coordination control method based on station control according to claim 1, characterized in that the energy management platform receives a frequency modulation action signal and performs frequency modulation in a fast adjustment mode.
6. The coordination control method for the primary frequency modulation and AGC of the wind power plant based on the station control according to claim 1 is characterized in that a droop frequency adjustment control strategy for increasing the power of the wind power plant is adopted in an active power control device of the wind power plant which is centrally connected in grid-connected operation.
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| CN110350592A (en) * | 2019-06-03 | 2019-10-18 | 南京国电南自电网自动化有限公司 | A kind of fast frequency responding power control system and method |
| CN111211582B (en) * | 2020-02-25 | 2022-03-15 | 西南交通大学 | Power grid comprehensive frequency modulation method based on double-fed fan frequency modulation capability in wind power plant |
| CN113471986B (en) * | 2020-03-31 | 2024-05-31 | 北京金风科创风电设备有限公司 | Method for adjusting active power of wind power plant, control equipment and controller of wind power plant |
| CN111668857B (en) * | 2020-04-30 | 2022-07-01 | 中国电力科学研究院有限公司 | Method and system for primary frequency modulation of hydropower station generator monitoring system |
| CN114566997A (en) * | 2020-11-27 | 2022-05-31 | 新疆金风科技股份有限公司 | Wind power plant frequency control method and device |
| CN112928778B (en) * | 2021-01-27 | 2023-11-28 | 许继集团有限公司 | Power and frequency regulation control method for photovoltaic energy storage power station |
| CN113285493A (en) * | 2021-03-24 | 2021-08-20 | 云南电力试验研究院(集团)有限公司 | Primary frequency modulation and AGC coordination control method for new energy station |
| CN113824132B (en) * | 2021-09-08 | 2023-08-18 | 许昌许继风电科技有限公司 | Primary frequency modulation method and system for new energy station with energy management function |
| CN113629785A (en) * | 2021-09-16 | 2021-11-09 | 中国船舶重工集团海装风电股份有限公司 | Wind power plant integrated power control system based on logic module |
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| CN102074957A (en) * | 2010-12-24 | 2011-05-25 | 中国长江三峡集团公司 | Primary frequency regulation and automatic generation control (AGC) load regulation coordinated control method |
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Effective date of registration: 20240827 Address after: No. 669, Hangtian Middle Road, Xi'an national civil aerospace industry base, Shaanxi 710100 Patentee after: Electric Power Research Institute of State Grid Shaanxi Electric Power Co.,Ltd. Country or region after: China Patentee after: XI'AN WUCHANG ELECTRIC POWER TECHNOLOGY Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: National Network (Xi'an) Environmental Protection Technology Center Co.,Ltd. Address before: No.669, Hangtian Middle Road, Chang'an District, Xi'an City, Shaanxi Province Patentee before: STATE GRID SHAANXI ELECTRIC POWER Research Institute Country or region before: China Patentee before: XI'AN WUCHANG ELECTRIC POWER TECHNOLOGY Co.,Ltd. Patentee before: STATE GRID CORPORATION OF CHINA |
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