WO2021164307A1 - Control method and apparatus for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of power grid - Google Patents

Control method and apparatus for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of power grid Download PDF

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WO2021164307A1
WO2021164307A1 PCT/CN2020/124787 CN2020124787W WO2021164307A1 WO 2021164307 A1 WO2021164307 A1 WO 2021164307A1 CN 2020124787 W CN2020124787 W CN 2020124787W WO 2021164307 A1 WO2021164307 A1 WO 2021164307A1
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photovoltaic power
power
grid
photovoltaic
active power
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PCT/CN2020/124787
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French (fr)
Chinese (zh)
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姜达军
吴福保
陈宁
朱凌志
张磊
赵大伟
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中国电力科学研究院有限公司
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Publication of WO2021164307A1 publication Critical patent/WO2021164307A1/en

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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
    • 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
    • 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
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the present disclosure relates to the field of new energy technology, for example, to a control method and device for photovoltaic power generation and energy storage to coordinate and participate in the primary frequency modulation of the power grid.
  • a control strategy is proposed from the perspective of a single photovoltaic power station and an independent energy storage power station with a large capacity independently participating in the primary frequency regulation of the grid. If a centralized energy storage system is configured in the photovoltaic power station, the centralized energy storage system is used to stabilize Power output fluctuations and peak shaving, centralized energy storage systems and photovoltaic power generation systems cannot share the task of participating in the primary frequency regulation of the grid by the entire photovoltaic power station through coordinated control. When photovoltaic power plants that do not include a centralized energy storage system participate in the primary frequency regulation of the power grid, the response speed is slow and the reliability is low.
  • the present disclosure provides a control method and device for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of a power grid, which overcomes the problems of slow response speed and low reliability in related technologies.
  • a control method for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of the power grid includes:
  • the photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
  • a control device for photovoltaic power generation and energy storage to coordinate and participate in the primary frequency regulation of the power grid including:
  • the determination module is set to determine the amount of active power adjustment required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the grid;
  • the correction module is set to correct the active power reference value of the photovoltaic power station based on the active power adjustment required for the photovoltaic power station to participate in the primary frequency regulation of the power grid;
  • the control module is set to adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station;
  • the photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
  • Fig. 1 is a flow chart of a control method for photovoltaic power generation and energy storage in an embodiment of the present invention to coordinately participate in primary frequency regulation of the power grid;
  • Fig. 2 is a schematic structural diagram of a photovoltaic power station including a centralized energy storage system in an embodiment of the present invention.
  • Embodiment 1 of the present invention provides a control method for photovoltaic power generation and energy storage to coordinate and participate in the primary frequency modulation of the power grid.
  • the flowchart is shown in Figure 1, and the process is as follows:
  • S101 Determine the amount of active power adjustment required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the power grid.
  • S102 Correct the active power reference value of the photovoltaic power station based on the active power adjustment required for the photovoltaic power station to participate in the primary frequency regulation of the power grid.
  • the photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
  • the present disclosure determines the active power adjustment amount required for the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the power grid; based on the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the power grid;
  • the revised active power reference value of photovoltaic power plant adjusts the respective active power of photovoltaic power generation and centralized energy storage system respectively, so that the centralized energy storage system and photovoltaic power generation system can jointly undertake the primary frequency regulation of the entire photovoltaic power plant through coordinated control. Tasks, the response speed of photovoltaic power plants participating in the primary frequency regulation of the power grid is fast, and the reliability is high.
  • the active power adjustment amount required for the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the power grid is determined;
  • the required active power adjustment amount corrects the active power reference value of the photovoltaic power station; based on the corrected active power reference value of the photovoltaic power station, the active power of the photovoltaic power generation system and the centralized energy storage system are adjusted separately.
  • the power generation system can jointly undertake the task of the entire photovoltaic power station participating in the primary frequency regulation of the grid through coordinated control, and the photovoltaic power station participating in the primary frequency regulation of the grid has a fast response speed and high reliability;
  • the technical solution provided by the present disclosure participates in the primary frequency regulation of the power grid through photovoltaic power generation, gives full play to the active power regulation capability of photovoltaic power generation, shares the regulation requirements of the centralized energy storage system, reduces the configuration capacity of the centralized energy storage system in the photovoltaic power station, and reduces cost of investment;
  • the technical solution provided by the present disclosure participates in the primary frequency regulation of the power grid through a centralized energy storage system, can quickly detect changes in the grid frequency and perform a preliminary active power adjustment response, and can realize the rapidity of the photovoltaic power station containing the energy storage system to support the grid frequency.
  • the structure diagram of a photovoltaic power station including a centralized energy storage system is shown in Figure 2.
  • the photovoltaic power station includes a photovoltaic power generation system and a centralized energy storage system.
  • the photovoltaic power generation system includes multiple photovoltaic power generation units, and all photovoltaic power generation units are connected to the collection point. All photovoltaic power generation units and the centralized energy storage system are connected to the grid connection point together and connected to the grid.
  • Each photovoltaic power generation unit includes a photovoltaic array, a direct current-alternating current (DC-AC) converter and a transformer, as shown in Figure 2 Among them, photovoltaic (PV) is a photovoltaic array, C is a DC-AC converter, T is a transformer, A is a collection point of photovoltaic power generation units in a photovoltaic power station, B is a grid connection point of a photovoltaic power station, and P cout is a collection point of a photovoltaic power generation system P gout is the actual active power of the grid-connected point of the photovoltaic power station, and P E is the active power of the centralized energy storage system.
  • PV photovoltaic
  • C is a DC-AC converter
  • T is a transformer
  • A is a collection point of photovoltaic power generation units in a photovoltaic power station
  • B is a grid connection point of a photovoltaic power station
  • P cout is a collection point
  • the determination of the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid includes:
  • the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the grid is determined.
  • determine the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the grid including:
  • the photovoltaic power station does not participate in the primary frequency regulation of the grid, that is, does not perform active power regulation, then the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the grid is set to 0;
  • the photovoltaic power station participates in the primary frequency regulation of the grid, that is, the active power adjustment is required, and the product of the power frequency adjustment coefficient and the frequency deviation is used as the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the grid quantity.
  • the power frequency adjustment coefficient refers to the active power value that the photovoltaic power station needs to adjust when the unit frequency deviation (1Hz) is used.
  • the active power reference value of the photovoltaic power station is corrected based on the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid, including:
  • the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid is added to the initial value of the active power command received by the photovoltaic power station to obtain the revised reference value of the active power of the photovoltaic power station.
  • the respective active powers of the photovoltaic power generation system and the centralized energy storage system are adjusted separately based on the revised active power reference value of the photovoltaic power station, including:
  • the first power deviation is evenly distributed to the multiple photovoltaic power generation units normally operating in the photovoltaic power generation system, and the multiple photovoltaic power generation units adjust their own active power according to the allocated active power; that is, assuming there are n photovoltaic power generation units, each The active power allocated to a photovoltaic power generation unit is "first power deviation/n", and each photovoltaic power generation unit adjusts its own power according to the allocated active power ("first power deviation/n") adjustment command.
  • the centralized energy storage system adjusts its own active power according to the second power deviation to ensure that the active output of the grid-connected point of the photovoltaic power station containing the energy storage meets the active power requirements of the primary frequency modulation of the power grid.
  • Embodiment 1 of the present invention In the control method for the coordinated participation of photovoltaic power generation and energy storage in the primary frequency regulation of the grid provided in Embodiment 1 of the present invention, after the photovoltaic power station is equipped with a centralized energy storage system, the frequency deviation between the grid frequency at the grid-connected point of the photovoltaic power station and the grid rated frequency Beyond the grid frequency dead zone, the centralized energy storage system quickly adjusts its own active power output in response to changes in system frequency. Through the centralized control system, the total active power output of the photovoltaic power generation system is adjusted, and the centralized storage that participates in the adjustment of the grid frequency is adjusted. The power output of the system can be replaced.
  • Embodiment 2 of the present invention also provides a control device for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of the power grid.
  • the functions of multiple components are described below.
  • the determination module is set to determine the amount of active power adjustment required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the grid;
  • the correction module is set to correct the active power reference value of the photovoltaic power station based on the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the grid;
  • the control module is set to adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station.
  • the photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
  • the determination module includes: a calculation unit and a determination unit.
  • the calculation unit is set to calculate the frequency deviation between the grid frequency of the grid-connected point of the photovoltaic power station and the rated frequency of the grid;
  • the determining unit is set to determine the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the power grid based on the frequency deviation.
  • the active power adjustment required for the photovoltaic power station to participate in the primary frequency regulation of the grid is set to 0;
  • the product of the power frequency adjustment coefficient and the frequency deviation is used as the active power adjustment required by the photovoltaic power station to participate in the primary frequency modulation of the power grid.
  • the correction module is set to:
  • the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid is added to the initial value of the active power command received by the photovoltaic power station to obtain the revised reference value of the active power of the photovoltaic power station.
  • the control module is set to:
  • the first power deviation is evenly distributed to the multiple photovoltaic power generation units normally operating in the photovoltaic power generation system, and the multiple photovoltaic power generation units adjust their own active power according to the allocated active power;
  • the centralized energy storage system adjusts its own active power based on the second power deviation.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may use one or more computer-usable storage media containing computer-usable program codes (including disk storage, portable compact disk read-only memory (Compact Disc Read Only Memory, CD-ROM), optical storage, etc.) In the form of a computer program product implemented on it.
  • computer-usable storage media containing computer-usable program codes (including disk storage, portable compact disk read-only memory (Compact Disc Read Only Memory, CD-ROM), optical storage, etc.)
  • CD-ROM Compact Disc Read Only Memory
  • optical storage etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

A control method and apparatus for the coordinated participation of photovoltaic power generation and energy storage in the primary frequency regulation of a power grid, the control method for the coordinated participation of photovoltaic power generation and energy storage in the primary frequency regulation of the power grid comprising: determining an active power adjustment amount required by a photovoltaic power station that comprises a centralized energy storage system to participate in the primary frequency regulation of a power grid (S101); on the basis of the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the power grid, correcting an active power reference value of the photovoltaic power station (S102); and on the basis of the corrected active power reference value of the photovoltaic power station, adjusting respective active power of a photovoltaic power generation system and the centralized energy storage system separately (S103), wherein the photovoltaic power station comprises the photovoltaic power generation system and the centralized energy storage system.

Description

光伏发电与储能协调参与电网一次调频的控制方法和装置Control method and device for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of power grid
本申请要求在2020年02月19日提交中国专利局、申请号为202010101596.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 202010101596.X on February 19, 2020, and the entire content of the application is incorporated into this application by reference.
技术领域Technical field
本公开涉及新能源技术领域，例如涉及一种光伏发电与储能协调参与电网一次调频的控制方法和装置。The present disclosure relates to the field of new energy technology, for example, to a control method and device for photovoltaic power generation and energy storage to coordinate and participate in the primary frequency modulation of the power grid.
背景技术Background technique
随着能源体制改革的深入，风电、光伏发电等新能源装机的比例不断提高，已成为多个地区电网中第二大电源，其中一些地区的电网的新能源装机占比已超40％以上。由于新能源发电设备没有响应系统频率变化的惯性和一次调频能力，电力系统的自调节和抗干扰能力将逐渐下降。当面对直流堵塞、故障停机或突然负载变化引起的频率偏差时，电力系统的安全稳定运行将受到极大的威胁。With the deepening of the energy system reform, the proportion of new energy installed capacity such as wind power and photovoltaic power generation has continued to increase, and it has become the second largest power source in many regional power grids. In some areas, the new energy installed capacity of the power grid has exceeded 40%. As new energy power generation equipment does not have the inertia and primary frequency modulation capability to respond to system frequency changes, the power system's self-regulation and anti-interference capabilities will gradually decline. When faced with frequency deviations caused by DC blockage, fault shutdown or sudden load changes, the safe and stable operation of the power system will be greatly threatened.
在一些研究中，从单个光伏电站和容量较大的独立储能电站各自独立参与电网一次调频的角度提出控制策略，如果在光伏电站内配置集中式储能系统，集中式储能系统用于平抑功率出力波动和调峰，集中式储能系统和光伏发电系统无法通过协调控制共同承担整个光伏电站参与电网一次调频的任务。而不包括集中式储能系统的光伏电站参与电网一次调频时，响应速度慢，且可靠性低。In some studies, a control strategy is proposed from the perspective of a single photovoltaic power station and an independent energy storage power station with a large capacity independently participating in the primary frequency regulation of the grid. If a centralized energy storage system is configured in the photovoltaic power station, the centralized energy storage system is used to stabilize Power output fluctuations and peak shaving, centralized energy storage systems and photovoltaic power generation systems cannot share the task of participating in the primary frequency regulation of the grid by the entire photovoltaic power station through coordinated control. When photovoltaic power plants that do not include a centralized energy storage system participate in the primary frequency regulation of the power grid, the response speed is slow and the reliability is low.
发明内容Summary of the invention
本公开提供一种光伏发电与储能协调参与电网一次调频的控制方法和装置，克服了相关技术中响应速度慢且可靠性低的问题。The present disclosure provides a control method and device for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of a power grid, which overcomes the problems of slow response speed and low reliability in related technologies.
提供一种光伏发电与储能协调参与电网一次调频的控制方法，包括：A control method for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of the power grid is provided, which includes:
确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量；Determine the amount of active power adjustment required for a photovoltaic power station that includes a centralized energy storage system to participate in the primary frequency regulation of the power grid;
基于所述光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值；Correcting the active power reference value of the photovoltaic power station based on the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the power grid;
基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节；Adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station;
其中，所述光伏电站包括光伏发电系统和所述集中式储能系统。Wherein, the photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
还提供一种光伏发电与储能协调参与电网一次调频的控制装置，包括：A control device for photovoltaic power generation and energy storage to coordinate and participate in the primary frequency regulation of the power grid is also provided, including:
确定模块，设置为确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量；The determination module is set to determine the amount of active power adjustment required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the grid;
修正模块，设置为基于所述光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值；The correction module is set to correct the active power reference value of the photovoltaic power station based on the active power adjustment required for the photovoltaic power station to participate in the primary frequency regulation of the power grid;
控制模块，设置为基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节；The control module is set to adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station;
其中，所述光伏电站包括光伏发电系统和所述集中式储能系统。Wherein, the photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
附图说明Description of the drawings
图1是本发明实施例中光伏发电与储能协调参与电网一次调频的控制方法的流程图；Fig. 1 is a flow chart of a control method for photovoltaic power generation and energy storage in an embodiment of the present invention to coordinately participate in primary frequency regulation of the power grid;
图2是本发明实施例中包含集中式储能系统的光伏电站的结构示意图。Fig. 2 is a schematic structural diagram of a photovoltaic power station including a centralized energy storage system in an embodiment of the present invention.
具体实施方式Detailed ways
下面结合附图对本公开进行说明。The present disclosure will be described below with reference to the accompanying drawings.
实施例1Example 1
本发明实施例1提供了一种光伏发电与储能协调参与电网一次调频的控制方法，流程图如图1所示，过程如下：Embodiment 1 of the present invention provides a control method for photovoltaic power generation and energy storage to coordinate and participate in the primary frequency modulation of the power grid. The flowchart is shown in Figure 1, and the process is as follows:
S101：确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量。S101: Determine the amount of active power adjustment required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the power grid.
S102：基于光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值。S102: Correct the active power reference value of the photovoltaic power station based on the active power adjustment required for the photovoltaic power station to participate in the primary frequency regulation of the power grid.
S103：基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节。S103: Adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station.
所述光伏电站包括光伏发电系统和所述集中式储能系统。The photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
本公开通过确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量；基于所述光伏电站参与电网一次调频所需的有功功率调节量 修正光伏电站有功功率参考值；基于修正后的光伏电站有功功率参考值对光伏发电与集中式储能系统各自的有功功率分别进行调节，实现集中式储能系统和光伏发电系统能够通过协调控制共同承担整个光伏电站参与电网一次调频的任务，光伏电站参与电网一次调频的响应速度快，且可靠性高。The present disclosure determines the active power adjustment amount required for the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the power grid; based on the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the power grid; The revised active power reference value of photovoltaic power plant adjusts the respective active power of photovoltaic power generation and centralized energy storage system respectively, so that the centralized energy storage system and photovoltaic power generation system can jointly undertake the primary frequency regulation of the entire photovoltaic power plant through coordinated control. Tasks, the response speed of photovoltaic power plants participating in the primary frequency regulation of the power grid is fast, and the reliability is high.
本公开提供的光伏发电与储能协调参与电网一次调频的控制方法中，确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量；基于所述光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值；基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节，集中式储能系统和光伏发电系统能够通过协调控制共同承担整个光伏电站参与电网一次调频的任务，光伏电站参与电网一次调频的响应速度快，且可靠性高；In the control method for the coordinated participation of photovoltaic power generation and energy storage in the primary frequency regulation of the power grid provided in the present disclosure, the active power adjustment amount required for the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the power grid is determined; The required active power adjustment amount corrects the active power reference value of the photovoltaic power station; based on the corrected active power reference value of the photovoltaic power station, the active power of the photovoltaic power generation system and the centralized energy storage system are adjusted separately. The power generation system can jointly undertake the task of the entire photovoltaic power station participating in the primary frequency regulation of the grid through coordinated control, and the photovoltaic power station participating in the primary frequency regulation of the grid has a fast response speed and high reliability;
本公开提供的技术方案通过光伏发电参与电网一次调频，充分发挥光伏发电的有功调节能力，分担集中式储能系统的调节需求，降低了光伏电站内集中式储能系统的配置容量，且减少了投资成本；The technical solution provided by the present disclosure participates in the primary frequency regulation of the power grid through photovoltaic power generation, gives full play to the active power regulation capability of photovoltaic power generation, shares the regulation requirements of the centralized energy storage system, reduces the configuration capacity of the centralized energy storage system in the photovoltaic power station, and reduces cost of investment;
本公开提供的技术方案通过集中式储能系统参与电网一次调频，能够快速探测电网频率的变化并进行初步有功功率调节响应，能够实现含储能系统的光伏电站对电网频率进行支撑的快速性。The technical solution provided by the present disclosure participates in the primary frequency regulation of the power grid through a centralized energy storage system, can quickly detect changes in the grid frequency and perform a preliminary active power adjustment response, and can realize the rapidity of the photovoltaic power station containing the energy storage system to support the grid frequency.
包含集中式储能系统的光伏电站的结构示意图如图2所示，光伏电站包括光伏发电系统和集中式储能系统，光伏发电系统包括多个光伏发电单元，所有光伏发电单元接入汇集点，所有光伏发电单元与集中式储能系统共同接入并网点后接入电网，每个光伏发电单元包括光伏阵列、直流变交流(Direct Current-Alternating Current，DC-AC)变换器和变压器，图2中，光伏(photovoltaic，PV)为光伏阵列，C为DC-AC变换器，T为变压器，A表示光伏电站中光伏发电单元汇集点，B表示光伏电站并网点，P cout为光伏发电系统汇集点的实际有功功率，P gout为光伏电站并网点的实际有功功率，P E为集中式储能系统的有功功率。 The structure diagram of a photovoltaic power station including a centralized energy storage system is shown in Figure 2. The photovoltaic power station includes a photovoltaic power generation system and a centralized energy storage system. The photovoltaic power generation system includes multiple photovoltaic power generation units, and all photovoltaic power generation units are connected to the collection point. All photovoltaic power generation units and the centralized energy storage system are connected to the grid connection point together and connected to the grid. Each photovoltaic power generation unit includes a photovoltaic array, a direct current-alternating current (DC-AC) converter and a transformer, as shown in Figure 2 Among them, photovoltaic (PV) is a photovoltaic array, C is a DC-AC converter, T is a transformer, A is a collection point of photovoltaic power generation units in a photovoltaic power station, B is a grid connection point of a photovoltaic power station, and P cout is a collection point of a photovoltaic power generation system P gout is the actual active power of the grid-connected point of the photovoltaic power station, and P E is the active power of the centralized energy storage system.
光伏电站参与电网一次调频所需的有功功率调节量的确定，包括：The determination of the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid includes:
计算光伏电站中的光伏电站并网点的电网频率与电网额定频率之间的频率偏差；Calculate the frequency deviation between the grid frequency of the grid-connected point of the photovoltaic power station and the rated frequency of the grid;
基于频率偏差确定光伏电站参与电网一次调频所需的有功功率调节量。Based on the frequency deviation, the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the grid is determined.
基于频率偏差确定光伏电站参与电网一次调频所需的有功功率调节量，包括：Based on the frequency deviation, determine the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the grid, including:
在频率偏差不超过电网频率死区的情况下，光伏电站不参与电网一次调频， 即不进行有功功率调节，则将光伏电站参与电网一次调频所需的有功功率调节量设为0；In the case that the frequency deviation does not exceed the grid frequency dead zone, the photovoltaic power station does not participate in the primary frequency regulation of the grid, that is, does not perform active power regulation, then the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the grid is set to 0;
在频率偏差超过电网频率死区的情况下，光伏电站参与电网一次调频，即需要进行有功功率调节，则将功频调节系数与频率偏差的乘积作为光伏电站参与电网一次调频所需的有功功率调节量。功频调节系数指单位频率偏差(1Hz)时，光伏电站需要调节的有功功率值。When the frequency deviation exceeds the grid frequency dead zone, the photovoltaic power station participates in the primary frequency regulation of the grid, that is, the active power adjustment is required, and the product of the power frequency adjustment coefficient and the frequency deviation is used as the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the grid quantity. The power frequency adjustment coefficient refers to the active power value that the photovoltaic power station needs to adjust when the unit frequency deviation (1Hz) is used.
基于光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值，包括：The active power reference value of the photovoltaic power station is corrected based on the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid, including:
将光伏电站参与电网一次调频所需的有功功率调节量与光伏电站接收的有功指令初始值相加，得到修正后的光伏电站有功功率参考值。The active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid is added to the initial value of the active power command received by the photovoltaic power station to obtain the revised reference value of the active power of the photovoltaic power station.
基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节，包括：The respective active powers of the photovoltaic power generation system and the centralized energy storage system are adjusted separately based on the revised active power reference value of the photovoltaic power station, including:
获取光伏电站中光伏发电单元汇集点的实际有功功率和光伏电站并网点的实际有功功率；Obtain the actual active power of the collection point of the photovoltaic power generation unit in the photovoltaic power station and the actual active power of the grid connection point of the photovoltaic power station;
计算修正后的光伏电站有功功率参考值与光伏电站中光伏发电单元汇集点的实际有功功率之间的第一功率偏差，以及修正后的光伏电站有功功率参考值与光伏电站并网点的实际有功功率之间的第二功率偏差；Calculate the first power deviation between the corrected reference value of the active power of the photovoltaic power plant and the actual active power of the photovoltaic power generation unit collection point in the photovoltaic power station, and the corrected reference value of the active power of the photovoltaic power plant and the actual active power of the grid-connected point of the photovoltaic power station The second power deviation between;
将第一功率偏差平均分配至光伏发电系统中正常运行的多个光伏发电单元，多个光伏发电单元根据所分配的有功功率对自身的有功功率进行调节；即假设有n个光伏发电单元，每一个光伏发电单元所分配到的有功功率为“第一功率偏差/n”，每一个光伏发电单元根据所分配的有功功率(“第一功率偏差/n”)调节指令后对自身功率进行调节。The first power deviation is evenly distributed to the multiple photovoltaic power generation units normally operating in the photovoltaic power generation system, and the multiple photovoltaic power generation units adjust their own active power according to the allocated active power; that is, assuming there are n photovoltaic power generation units, each The active power allocated to a photovoltaic power generation unit is "first power deviation/n", and each photovoltaic power generation unit adjusts its own power according to the allocated active power ("first power deviation/n") adjustment command.
集中式储能系统根据第二功率偏差对自身的有功功率进行调节，保证含储能光伏电站并网点的有功输出满足参与电网一次调频的有功功率要求。The centralized energy storage system adjusts its own active power according to the second power deviation to ensure that the active output of the grid-connected point of the photovoltaic power station containing the energy storage meets the active power requirements of the primary frequency modulation of the power grid.
本发明实施例1中提供的光伏发电与储能协调参与电网一次调频的控制方法中，光伏电站配置集中式储能系统后，当光伏电站并网点的电网频率与电网额定频率之间的频率偏差超过电网频率死区，集中式储能系统迅速调整自身输出的有功功率以响应系统频率的变化，通过集中控制系统对光伏发电系统的总有功功率输出进行调节，对参与电网频率调节的集中式储能系统的功率输出进行置换。在提高光伏电站参与电网一次调频响应速度的同时，可以降低储能电网的荷电状态变化量，进而减少光伏电站内集中式储能系统容量的配置需求。In the control method for the coordinated participation of photovoltaic power generation and energy storage in the primary frequency regulation of the grid provided in Embodiment 1 of the present invention, after the photovoltaic power station is equipped with a centralized energy storage system, the frequency deviation between the grid frequency at the grid-connected point of the photovoltaic power station and the grid rated frequency Beyond the grid frequency dead zone, the centralized energy storage system quickly adjusts its own active power output in response to changes in system frequency. Through the centralized control system, the total active power output of the photovoltaic power generation system is adjusted, and the centralized storage that participates in the adjustment of the grid frequency is adjusted. The power output of the system can be replaced. While improving the response speed of photovoltaic power plants participating in the primary frequency regulation of the power grid, it can reduce the change in the state of charge of the energy storage grid, thereby reducing the configuration requirements for the capacity of the centralized energy storage system in the photovoltaic power station.
实施例2Example 2
本发明实施例2还提供一种光伏发电与储能协调参与电网一次调频的控制装置，下面对多个组成部分的功能进行说明。Embodiment 2 of the present invention also provides a control device for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of the power grid. The functions of multiple components are described below.
确定模块，设置为确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量；The determination module is set to determine the amount of active power adjustment required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the grid;
修正模块，设置为基于光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值；The correction module is set to correct the active power reference value of the photovoltaic power station based on the active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the grid;
控制模块，设置为基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节。The control module is set to adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station.
所述光伏电站包括光伏发电系统和所述集中式储能系统。The photovoltaic power station includes a photovoltaic power generation system and the centralized energy storage system.
确定模块包括：计算单元和确定单元。The determination module includes: a calculation unit and a determination unit.
计算单元，设置为计算光伏电站中的光伏电站并网点的电网频率与电网额定频率之间的频率偏差；The calculation unit is set to calculate the frequency deviation between the grid frequency of the grid-connected point of the photovoltaic power station and the rated frequency of the grid;
确定单元，设置为基于频率偏差确定光伏电站参与电网一次调频所需的有功功率调节量。The determining unit is set to determine the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the power grid based on the frequency deviation.
确定单元是设置为：Determine if the unit is set to:
若频率偏差不超过电网频率死区，光伏电站不参与电网一次调频，则将光伏电站参与电网一次调频所需的有功功率调节量设为0；If the frequency deviation does not exceed the grid frequency dead zone, and the photovoltaic power station does not participate in the primary frequency regulation of the grid, the active power adjustment required for the photovoltaic power station to participate in the primary frequency regulation of the grid is set to 0;
若频率偏差超过电网频率死区，光伏电站参与电网一次调频，则将功频调节系数与频率偏差的乘积作为光伏电站参与电网一次调频所需的有功功率调节量。If the frequency deviation exceeds the grid frequency dead zone, and the photovoltaic power plant participates in the primary frequency modulation of the power grid, the product of the power frequency adjustment coefficient and the frequency deviation is used as the active power adjustment required by the photovoltaic power station to participate in the primary frequency modulation of the power grid.
修正模块是设置为：The correction module is set to:
将光伏电站参与电网一次调频所需的有功功率调节量与光伏电站接收的有功指令初始值相加，得到修正后的光伏电站有功功率参考值。The active power adjustment required by the photovoltaic power station to participate in the primary frequency regulation of the power grid is added to the initial value of the active power command received by the photovoltaic power station to obtain the revised reference value of the active power of the photovoltaic power station.
控制模块是设置为：The control module is set to:
获取光伏电站中光伏发电单元汇集点的实际有功功率和光伏电站并网点的实际有功功率；Obtain the actual active power of the collection point of the photovoltaic power generation unit in the photovoltaic power station and the actual active power of the grid connection point of the photovoltaic power station;
计算修正后的光伏电站有功功率参考值与光伏电站中光伏发电单元汇集点的实际有功功率之间的第一功率偏差，以及修正后的光伏电站有功功率参考值与光伏电站并网点的实际有功功率之间的第二功率偏差；Calculate the first power deviation between the corrected reference value of the active power of the photovoltaic power plant and the actual active power of the photovoltaic power generation unit collection point in the photovoltaic power station, and the corrected reference value of the active power of the photovoltaic power plant and the actual active power of the grid-connected point of the photovoltaic power station The second power deviation between;
将第一功率偏差平均分配至光伏发电系统中正常运行的多个光伏发电单元，多个光伏发电单元根据所分配的有功功率对自身的有功功率进行调节；The first power deviation is evenly distributed to the multiple photovoltaic power generation units normally operating in the photovoltaic power generation system, and the multiple photovoltaic power generation units adjust their own active power according to the allocated active power;
集中式储能系统基于第二功率偏差对自身的有功功率进行调节。The centralized energy storage system adjusts its own active power based on the second power deviation.
以上装置的多个部分以功能分为多种模块或单元分别描述。在实施本申请时可以把多个模块或单元的功能在同一个或多个软件或硬件中实现。Multiple parts of the above device are divided into multiple modules or units by function and described separately. When implementing this application, the functions of multiple modules or units can be implemented in the same or multiple software or hardware.
本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括磁盘存储器、便携式紧凑磁盘只读存储器(Compact Disc Read Only Memory，CD-ROM)、光学存储器等)上实施的计算机程序产品的形式。The embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may use one or more computer-usable storage media containing computer-usable program codes (including disk storage, portable compact disk read-only memory (Compact Disc Read Only Memory, CD-ROM), optical storage, etc.) In the form of a computer program product implemented on it.
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。This application is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of this application. Each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment can be used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Claims (10)

  1. 一种光伏发电与储能协调参与电网一次调频的控制方法，包括：A control method for coordinated participation of photovoltaic power generation and energy storage in primary frequency regulation of the power grid includes:
    确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量；Determine the amount of active power adjustment required for a photovoltaic power station that includes a centralized energy storage system to participate in the primary frequency regulation of the power grid;
    基于所述光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值；Correcting the active power reference value of the photovoltaic power station based on the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the power grid;
    基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节；Adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station;
    其中，所述光伏电站包括所述光伏发电系统和所述集中式储能系统。Wherein, the photovoltaic power station includes the photovoltaic power generation system and the centralized energy storage system.
  2. 根据权利要求1所述的方法，其中，所述确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量，包括：The method according to claim 1, wherein the determining the active power adjustment amount required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the power grid comprises:
    计算所述光伏电站中的光伏电站并网点的电网频率与电网额定频率之间的频率偏差；Calculating the frequency deviation between the grid frequency of the grid-connected point of the photovoltaic power station in the photovoltaic power station and the rated frequency of the power grid;
    基于所述频率偏差确定所述光伏电站参与电网一次调频所需的有功功率调节量。Based on the frequency deviation, an active power adjustment amount required for the photovoltaic power station to participate in the primary frequency adjustment of the power grid is determined.
  3. 根据权利要求2所述的方法，其中，所述基于所述频率偏差确定所述光伏电站参与电网一次调频所需的有功功率调节量，包括：The method according to claim 2, wherein the determining the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency adjustment of the power grid based on the frequency deviation comprises:
    在所述频率偏差不超过电网频率死区的情况下，将所述光伏电站参与电网一次调频所需的有功功率调节量设为0；In the case that the frequency deviation does not exceed the grid frequency dead zone, the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the grid is set to 0;
    在所述频率偏差超过电网频率死区的情况下，将功频调节系数与所述频率偏差的乘积作为所述光伏电站参与电网一次调频所需的有功功率调节量。In the case that the frequency deviation exceeds the grid frequency dead zone, the product of the power frequency adjustment coefficient and the frequency deviation is used as the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency modulation of the grid.
  4. 根据权利要求1所述的方法，其中，所述基于所述光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值，包括：The method according to claim 1, wherein the correcting the active power reference value of the photovoltaic power station based on the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the power grid comprises:
    将所述光伏电站参与电网一次调频所需的有功功率调节量与所述光伏电站接收的有功指令初始值相加，得到所述修正后的光伏电站有功功率参考值。The active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the power grid is added to the initial value of the active power command received by the photovoltaic power station to obtain the revised active power reference value of the photovoltaic power station.
  5. 根据权利要求1所述的方法，其中，所述基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节，包括：The method according to claim 1, wherein the adjusting the respective active powers of the photovoltaic power generation system and the centralized energy storage system based on the corrected reference value of the active power of the photovoltaic power station comprises:
    获取所述光伏电站中光伏发电单元汇集点的实际有功功率和光伏电站并网点的实际有功功率；Acquiring the actual active power of the collection point of the photovoltaic power generation unit in the photovoltaic power station and the actual active power of the grid connection point of the photovoltaic power station;
    计算所述修正后的光伏电站有功功率参考值与所述光伏电站中光伏发电单元汇集点的实际有功功率之间的第一功率偏差，以及所述修正后的光伏电站有 功功率参考值与所述光伏电站并网点的实际有功功率之间的第二功率偏差；Calculate the first power deviation between the corrected active power reference value of the photovoltaic power station and the actual active power of the photovoltaic power generation unit collection point in the photovoltaic power station, and the corrected active power reference value of the photovoltaic power plant and the The second power deviation between the actual active power of the photovoltaic power station grid connection point;
    将所述第一功率偏差平均分配至所述光伏发电系统中正常运行的多个光伏发电单元，并通过所分配的有功功率调节所述多个光伏发电单元自身的有功功率；Equally distribute the first power deviation to a plurality of photovoltaic power generation units normally operating in the photovoltaic power generation system, and adjust the active power of the plurality of photovoltaic power generation units themselves through the allocated active power;
    根据所述第二功率偏差调节所述集中式储能系统自身的有功功率。Adjusting the active power of the centralized energy storage system itself according to the second power deviation.
  6. 一种光伏发电与储能协调参与电网一次调频的控制装置，包括：A control device for photovoltaic power generation and energy storage to coordinate and participate in the primary frequency regulation of the power grid, including:
    确定模块，设置为确定包含集中式储能系统的光伏电站参与电网一次调频所需的有功功率调节量；The determination module is set to determine the amount of active power adjustment required by the photovoltaic power station including the centralized energy storage system to participate in the primary frequency regulation of the grid;
    修正模块，设置为基于所述光伏电站参与电网一次调频所需的有功功率调节量修正光伏电站有功功率参考值；The correction module is set to correct the active power reference value of the photovoltaic power station based on the active power adjustment required for the photovoltaic power station to participate in the primary frequency regulation of the power grid;
    控制模块，设置为基于修正后的光伏电站有功功率参考值对光伏发电系统与集中式储能系统各自的有功功率分别进行调节；The control module is set to adjust the respective active power of the photovoltaic power generation system and the centralized energy storage system based on the revised active power reference value of the photovoltaic power station;
    其中，所述光伏电站包括所述光伏发电系统和所述集中式储能系统。Wherein, the photovoltaic power station includes the photovoltaic power generation system and the centralized energy storage system.
  7. 根据权利要求6所述的装置，其中，所述确定模块包括：The device according to claim 6, wherein the determining module comprises:
    计算单元，设置为计算所述光伏电站中的光伏电站并网点的电网频率与电网额定频率之间的频率偏差；The calculation unit is configured to calculate the frequency deviation between the grid frequency of the grid-connected point of the photovoltaic power station in the photovoltaic power station and the rated frequency of the power grid;
    确定单元，设置为基于所述频率偏差确定所述光伏电站参与电网一次调频所需的有功功率调节量。The determining unit is configured to determine, based on the frequency deviation, the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency modulation of the power grid.
  8. 根据权利要求7所述的装置，其中，所述确定单元是设置为：The device according to claim 7, wherein the determining unit is configured to:
    在所述频率偏差不超过电网频率死区的情况下，将所述光伏电站参与电网一次调频所需的有功功率调节量设为0；In the case that the frequency deviation does not exceed the grid frequency dead zone, the active power adjustment amount required for the photovoltaic power station to participate in the primary frequency regulation of the grid is set to 0;
    在所述频率偏差超过电网频率死区的情况下，将功频调节系数与所述频率偏差的乘积作为所述光伏电站参与电网一次调频所需的有功功率调节量。In the case that the frequency deviation exceeds the grid frequency dead zone, the product of the power frequency adjustment coefficient and the frequency deviation is used as the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency modulation of the grid.
  9. 根据权利要求6所述的装置，其中，所述修正模块是设置为：The device according to claim 6, wherein the correction module is configured to:
    将所述光伏电站参与电网一次调频所需的有功功率调节量与所述光伏电站接收的有功指令初始值相加，得到所述修正后的光伏电站有功功率参考值。The active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the power grid is added to the initial value of the active power command received by the photovoltaic power station to obtain the revised active power reference value of the photovoltaic power station.
  10. 根据权利要求6所述的装置，其中，所述控制模块是设置为：The device according to claim 6, wherein the control module is configured to:
    获取所述光伏电站中光伏发电单元汇集点的实际有功功率和光伏电站并网点的实际有功功率；Acquiring the actual active power of the collection point of the photovoltaic power generation unit in the photovoltaic power station and the actual active power of the grid connection point of the photovoltaic power station;
    计算所述修正后的光伏电站有功功率参考值与所述光伏电站中光伏发电单 元汇集点的实际有功功率之间的第一功率偏差，以及所述修正后的光伏电站有功功率参考值与所述光伏电站并网点的实际有功功率之间的第二功率偏差；Calculate the first power deviation between the corrected active power reference value of the photovoltaic power station and the actual active power of the photovoltaic power generation unit collection point in the photovoltaic power station, and the corrected active power reference value of the photovoltaic power plant and the The second power deviation between the actual active power of the photovoltaic power station grid connection point;
    将所述第一功率偏差平均分配至所述光伏发电系统中正常运行的多个光伏发电单元，并通过所分配的有功功率调节所述多个光伏发电单元自身的有功功率；Equally distribute the first power deviation to a plurality of photovoltaic power generation units normally operating in the photovoltaic power generation system, and adjust the active power of the plurality of photovoltaic power generation units themselves through the allocated active power;
    根据所述第二功率偏差调节所述集中式储能系统自身的有功功率。Adjusting the active power of the centralized energy storage system itself according to the second power deviation.
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