WO2023274428A2 - Power distribution method for photovoltaic power storage station group to participate in power grid stability control - Google Patents

Power distribution method for photovoltaic power storage station group to participate in power grid stability control Download PDF

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WO2023274428A2
WO2023274428A2 PCT/CN2022/119741 CN2022119741W WO2023274428A2 WO 2023274428 A2 WO2023274428 A2 WO 2023274428A2 CN 2022119741 W CN2022119741 W CN 2022119741W WO 2023274428 A2 WO2023274428 A2 WO 2023274428A2
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power
station
grid
regional
control
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PCT/CN2022/119741
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French (fr)
Chinese (zh)
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WO2023274428A3 (en
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南东亮
赵启
陈军
张朋越
张路
张静
楼超艳
段青煕
谭金龙
彭寅章
朱子民
唐君毅
高兴
马健
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国网新疆电力有限公司电力科学研究院
中国计量大学
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Publication of WO2023274428A2 publication Critical patent/WO2023274428A2/en
Priority to ZA2023/00660A priority Critical patent/ZA202300660B/en
Publication of WO2023274428A3 publication Critical patent/WO2023274428A3/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
    • H02J3/381—Dispersed generators
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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

Definitions

  • the invention belongs to power system control technology, and in particular relates to a power distribution method for a group of optical storage power stations to participate in grid stability control.
  • photovoltaic power generation With the rapid reduction in the cost of photovoltaic power generation, new energy sources dominated by photovoltaic power generation occupy an important position in the power system and become the development trend of modern power grids. After the proportion of new energy continues to increase, due to the intermittent and fluctuating characteristics of photovoltaic and other new energy output, the power grid has difficulty in peak regulation, and various localities have introduced policies requiring that new energy power generation must be equipped with certain energy storage. Photovoltaic combined energy storage station, because it is based on voltage source converter, has fast control capability. Relevant engineering operation data shows that photovoltaic storage station can complete power control within 100 milliseconds.
  • the purpose of the present invention is to provide a power distribution method for photovoltaic storage group power stations to participate in grid stability control, and to promote the application of grid stability control strategies.
  • a power distribution method for a group of optical-storage power stations to participate in grid stability control is based on the centralized control system architecture of the regional master station and sub-stations, and integrates the network topology information and the power of the optical-storage power station in the region in the regional master station.
  • Control information including the establishment of an admittance matrix to evaluate the voltage change of the optical storage node of the system after the power of the optical storage power station changes, according to the information of the sensitivity of the voltage change and the information of the total control power, the power control amount is allocated and sent to different optical storage stations, and includes
  • the calculation process is as follows:
  • R ij + jX ij represents the resistance and reactance of the j-th branch on the link from the i-th optical storage station to the point of common connection (PCC).
  • PCC point of common connection
  • the regional master station for reducing Pre ref , the calculation method of the power allocated by each optical storage power station is as follows:
  • the method of the present invention can optimize the control amount of different optical storage stations according to the total power control demand and network topology, and avoid local overvoltage or undervoltage problems caused by large control amount of optical storage stations, which is different from the existing power grid control technology Compared with the existing stability control device, the removal of optical storage power stations is usually done in order, and there is a risk of local overvoltage or undervoltage.
  • the present invention optimizes the power control amount of each optical storage power station through network topology information, and balances the power control of each station. The voltage can avoid local over-voltage or under-voltage problems.
  • Fig. 1 is the flow chart of calculation of regional master station power distribution realized according to the method of the present invention
  • Figure 2 is a schematic diagram of distribution and regulation of power grid stability control strategy in a certain region.
  • the present invention provides a power distribution method for the group of optical storage power stations to participate in the grid stability control, adopting the centralized control system architecture of the regional main station and substations, and integrating the network topology information in the region and the power control of the optical storage power station in the regional main station Information, when the grid-side stability control device needs to reduce or increase the power in the region due to emergency control needs, the regional master station calculates the optimal power control amount in the region according to the reduced or provided power, and then according to the network topology information in the region distribute.
  • the centralized control system architecture of the regional master station and sub-stations is adopted, and the regional master station integrates the network topology information in the region and the power control information of the optical storage power station.
  • the regional master station calculates the optimal power control amount allocation in this area according to the size of the reduced or provided power, and then according to the network topology information of the regional power grid.
  • the centralized control system architecture of the present invention adopts a centralized architecture in which the regional master station is connected to multiple sub-stations, and the region communicates with the grid side stability control device.
  • the function is to collect the adjustable information of the optical storage power station in the region and send it to
  • the grid-side stability control device receives the power control command of the grid-side stability control device, and sends it to each sub-station of the optical storage power station after distribution by the regional master station;
  • To the regional master station receive the power control command of the regional master station and respond quickly; for the regional power grid, it is a radial power grid, including power components such as optical storage power stations, substations, lines, transformers, etc., and there is a public connection point PCC with the main power grid .
  • the regional master station integrates the network topology information in the region, including nodes and branches. Nodes include the dividing points of power components such as buses, and branches include the resistance and reactance of power components such as lines and transformers.
  • the network topology information is
  • R ij + jX ij represents the resistance and reactance of the j-th branch on the link from the i-th optical storage station to the point of common connection (PCC).
  • PCC point of common connection
  • the calculation method is as follows:
  • the regional master station calculates the optimal power control amount allocation in the region according to the reduced or provided power, and then according to the network topology information in the region.
  • the specific implementation will be described by taking a regional power grid (shown in FIG. 2 ) containing five solar-storage power stations as an example.
  • the network topology is formed. According to the branch circuit resistance and reactance information of the regional power grid, the topology information is described as follows:
  • Step (S1) In calculating the pressure difference change relationship of each photovoltaic storage power station unit power change, according to formula (1) and formula (2), the following pressure difference settlement results are obtained:
  • Step (S2) calculates the unit power change sensitivity coefficient of each optical-storage station, according to formula (3) and formula (4), sums each pressure difference of each optical-storage link, and the calculation in step (S1) The results are summed row by row to get the following result:
  • step (S3) the regional master lowers Pref if necessary according to the power control command received from the stability control master. Then the calculation results of the power allocated by each photovoltaic storage power station are as follows:
  • the power allocated by the five optical storage stations is divided into 0.20, 0.13, 0.15, 0.13, and 0.4 respectively.
  • the sum power is approximately equal to 1, and the error comes from decimal interception during calculation.
  • the strategy for the corresponding PV-storage power station group to participate in the grid stability control and the corresponding power distribution of the regional master station are obtained as shown in FIG. 2 .

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

Disclosed in the present invention is a power distribution method for a photovoltaic power storage station group to participate in power grid stability control. The method comprises: using a regional main station and substation centralized control system architecture, wherein network topology information of the present region and power control information of photovoltaic power storage stations are integrated into a regional main station; and when a power grid-side stability control apparatus requires the power in the present region to reduce or increase for the sake of an emergency control requirement, the regional main station calculating the optimal power control quantity distribution in the present region according to the magnitude of the reduced or increased power and according to the network topology information of the present region. The present invention can collect and evaluate photovoltaic storage controllable resource information of a regional power grid, and participates in power grid stability control and other auxiliary services; and control quantities of different photovoltaic storage stations are optimized inside a region according to the total power control requirement and a network topology, thereby avoiding the problem of local overvoltage or undervoltage caused by a large control quantity of a photovoltaic storage station.

Description

一种光储电站群参与电网稳定控制的功率分配方法A power distribution method for photovoltaic-storage power station groups to participate in grid stability control
本申请要求于2022年03月14日提交中国专利局、申请号为202210245803.8、发明名称为“一种光储电站群参与电网稳定控制的功率分配方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application submitted to the China Patent Office on March 14, 2022, with the application number 202210245803.8, and the title of the invention is "A Power Distribution Method for Photovoltaic Storage Power Station Groups to Participate in Power Grid Stability Control", the entire content of which Incorporated in this application by reference.
技术领域technical field
本发明属于电力***控制技术，具体涉及一种光储电站群参与电网稳定控制的功率分配方法。The invention belongs to power system control technology, and in particular relates to a power distribution method for a group of optical storage power stations to participate in grid stability control.
背景技术Background technique
随着光伏发电成本的快速降低，以光伏发电为主的新能源在电力***占据重要的地位，成为现代电网的发展趋势。新能源占比不断提升后，由于光伏等新能源出力的间歇性、波动性等特征，电网出现调峰困难，各地纷纷出台政策，要求新能源发电需配置一定储能。光伏联合储能场站，由于基于电压源型换流器实现，具备快速控制能力，相关工程运行数据表明，光储电站可在百毫秒内完成功率控制。此外，中国新能源分布不均，大量电力需从西部送端电网通过直流输送到东部受端电网，一旦出现直流闭锁，送端电网功率盈余将出现高频问题，需采取稳定控制措施，通常的措施是切除部分电源。由于光储电站具备快速功率控制特性，通过快速功率控制取代切机将成为未来电网稳定控制的主要手段之一。With the rapid reduction in the cost of photovoltaic power generation, new energy sources dominated by photovoltaic power generation occupy an important position in the power system and become the development trend of modern power grids. After the proportion of new energy continues to increase, due to the intermittent and fluctuating characteristics of photovoltaic and other new energy output, the power grid has difficulty in peak regulation, and various localities have introduced policies requiring that new energy power generation must be equipped with certain energy storage. Photovoltaic combined energy storage station, because it is based on voltage source converter, has fast control capability. Relevant engineering operation data shows that photovoltaic storage station can complete power control within 100 milliseconds. In addition, the distribution of new energy in China is uneven, and a large amount of power needs to be transmitted from the sending-end power grid in the west to the receiving-end power grid in the east through DC. Once a DC block occurs, high-frequency problems will occur in the power surplus of the sending-end power grid. The measure is to cut off part of the power supply. Due to the fast power control characteristics of optical storage power stations, replacing machine cut-offs with fast power control will become one of the main means of future grid stability control.
然而由于光储电站大多处于电网末端，因分布位置不同，大量切除光储电站后将出现局部过电压、欠电压问题，导致引发新的电网稳定问题。However, since most of the photovoltaic storage power stations are located at the end of the power grid, due to the different distribution locations, local overvoltage and undervoltage problems will occur after a large number of photovoltaic storage power stations are removed, leading to new grid stability problems.
发明内容Contents of the invention
本发明的目的在于提供一种光储群电站参与电网稳定控制的功率分配方法，促进电网稳定控制策略的应用。The purpose of the present invention is to provide a power distribution method for photovoltaic storage group power stations to participate in grid stability control, and to promote the application of grid stability control strategies.
技术方案：一种光储电站群参与电网稳定控制的功率分配方法，所述方法基于区域主站和子站的集中式控制***架构，在区域主站内集成本区域内网络拓扑信息及光储电站功率控制信息，包括建立导纳矩阵评估光储电站功率发生 改变后***光储节点电压变化，根据电压变化灵敏度信息及总控制功率大小信息，分配功率控制量并发送到不同的光储电站，且包括如下计算过程：Technical solution: A power distribution method for a group of optical-storage power stations to participate in grid stability control. The method is based on the centralized control system architecture of the regional master station and sub-stations, and integrates the network topology information and the power of the optical-storage power station in the region in the regional master station. Control information, including the establishment of an admittance matrix to evaluate the voltage change of the optical storage node of the system after the power of the optical storage power station changes, according to the information of the sensitivity of the voltage change and the information of the total control power, the power control amount is allocated and sent to different optical storage stations, and includes The calculation process is as follows:
(1)基于区域主站、子站集中式控制***架构，建立本区域电网网络拓扑信息，其表达式如下所示：(1) Based on the centralized control system architecture of the regional master station and substations, establish the network topology information of the regional power grid, and its expression is as follows:
Figure PCTCN2022119741-appb-000001
Figure PCTCN2022119741-appb-000001
其中，R ij+jX ij代表第i个光储站到公共连接点(PCC)链路上的第j个支路的电阻、电抗，上述公式中，每行为一个链路；ni代表第i个链路上支路的个数，1≤i≤m；m代表光储电站数量或者链路数量； Among them, R ij + jX ij represents the resistance and reactance of the j-th branch on the link from the i-th optical storage station to the point of common connection (PCC). In the above formula, each row is a link; ni represents the i-th The number of branches on the link, 1≤i≤m; m represents the number of optical storage power stations or the number of links;
(2)首先根据区域电网网络拓扑，从末端第i个光储电站i开始，考虑单位功率P R、Q R变化，按照公式(2)以此计算公式(1)中每个链路上第i节点到i+1节点压差变化； (2) Firstly, according to the network topology of the regional power grid, starting from the i-th photovoltaic storage station i at the end, considering the change of the unit power P R and Q R , according to the formula (2) to calculate the No. Pressure difference change from node i to node i+1;
每个链路上第i节点到i+1节点压差变化计算公式如下所示：The formula for calculating the pressure difference change from node i to node i+1 on each link is as follows:
Figure PCTCN2022119741-appb-000002
Figure PCTCN2022119741-appb-000002
其中，V R为额定电压，近似V R＝1，仅考虑有功控制时Q R＝0； Among them, VR is the rated voltage, approximately VR = 1, and Q R = 0 when only active power control is considered ;
通过上述计算方法，得到如下压差结算结果：Through the above calculation method, the following differential pressure settlement results are obtained:
Figure PCTCN2022119741-appb-000003
Figure PCTCN2022119741-appb-000003
(3)计算每个光储电站单位功率变化灵敏度系数，将每个光储链路每个压差求和，即上述公式(3)中按行求和，得到如下表达式：(3) Calculate the unit power change sensitivity coefficient of each optical-storage power station, and sum each pressure difference of each optical-storage link, that is, the row-by-line summation in the above formula (3) to obtain the following expression:
Figure PCTCN2022119741-appb-000004
Figure PCTCN2022119741-appb-000004
将上述公式标幺化得到不同光储电站的功率电压灵敏度系数，其表达式如下：The power and voltage sensitivity coefficients of different solar-storage power stations are obtained by standardizing the above formulas, and the expressions are as follows:
Figure PCTCN2022119741-appb-000005
Figure PCTCN2022119741-appb-000005
计算光储电站功率选择灵敏度系数，得到如下表达式：Calculate the power selection sensitivity coefficient of the photovoltaic storage power station, and get the following expression:
Figure PCTCN2022119741-appb-000006
Figure PCTCN2022119741-appb-000006
(4)区域主站根据从稳定控制主站接收到的功率控制命令，对于降低P ref，各个光储电站分配的功率计算方法如下所示： (4) According to the power control command received from the stability control master station, the regional master station, for reducing Pre ref , the calculation method of the power allocated by each optical storage power station is as follows:
Figure PCTCN2022119741-appb-000007
Figure PCTCN2022119741-appb-000007
有益效果：本发明所述方法可以根据总功率控制需求及网络拓扑优化不同光处站的控制量，避免光储站控制量大引发的局部过压或者欠压问题，与现有的电网控制技术相比，现有稳定控制装置切除光储电站通常是按照顺序切除，存在局部过电压或欠电压风险，但是本发明案通过网络拓扑信息优化各个光储电站功率控制量，平衡各站功率控制后的电压，可避免出现局部过电压或欠电压问题。Beneficial effects: the method of the present invention can optimize the control amount of different optical storage stations according to the total power control demand and network topology, and avoid local overvoltage or undervoltage problems caused by large control amount of optical storage stations, which is different from the existing power grid control technology Compared with the existing stability control device, the removal of optical storage power stations is usually done in order, and there is a risk of local overvoltage or undervoltage. However, the present invention optimizes the power control amount of each optical storage power station through network topology information, and balances the power control of each station. The voltage can avoid local over-voltage or under-voltage problems.
附图说明Description of drawings
图1是依据本发明所述方法实现的区域主站功率分配计算流程图；Fig. 1 is the flow chart of calculation of regional master station power distribution realized according to the method of the present invention;
图2是某区域电网稳定控制策略分配调节的示意图。Figure 2 is a schematic diagram of distribution and regulation of power grid stability control strategy in a certain region.
具体实施方式detailed description
为详细的说明本发明所公开的技术方案，下面结合说明书附图及具体实施例做进一步的表述。In order to describe the technical solutions disclosed in the present invention in detail, further descriptions will be made below in conjunction with the accompanying drawings and specific embodiments.
本发明所提供的是一种光储电站群参与电网稳定控制的功率分配方法，采用区域主站、子站集中式控制***架构，区域主站内集成本区域内网络拓扑信息及光储电站功率控制信息，当电网侧稳定控制装置出于紧急控制需求，需要本区域降低或提升功率时，区域主站根据降低或提供功率大小，再根据本区域网络拓扑信息，计算本区域内最优功率控制量分配。The present invention provides a power distribution method for the group of optical storage power stations to participate in the grid stability control, adopting the centralized control system architecture of the regional main station and substations, and integrating the network topology information in the region and the power control of the optical storage power station in the regional main station Information, when the grid-side stability control device needs to reduce or increase the power in the region due to emergency control needs, the regional master station calculates the optimal power control amount in the region according to the reduced or provided power, and then according to the network topology information in the region distribute.
在本发明所述方法中，采用区域主站、子站集中式控制***架构，区域主站内集成本区域内网络拓扑信息及光储电站功率控制信息，当电网侧稳定控制 装置出于紧急控制需求，需要本区域降低或者提升功率时，区域主站根据降低或者提供功率大小，再根据本区域电网网络拓扑信息，计算本区域内最优功率控制量分配。In the method of the present invention, the centralized control system architecture of the regional master station and sub-stations is adopted, and the regional master station integrates the network topology information in the region and the power control information of the optical storage power station. , when it is necessary to reduce or increase the power in this area, the regional master station calculates the optimal power control amount allocation in this area according to the size of the reduced or provided power, and then according to the network topology information of the regional power grid.
具体的说，本发明的集中式控制***架构，采用区域主站连接多个子站的集中式架构，区域与电网侧稳定控制装置通信，功能是汇集本区域内光储电站可调节信息并发送到电网侧稳定控制装置，接收电网侧稳定控制装置功率控制命令，在区域主站分配后发送到各个光储电站子站；光储电站子站的主要功能为评估本站可下调即上调功率并发送到区域主站，接收区域主站的功率控制命令并快速响应；对于区域电网，为辐射状电网，包括光储电站、变电站、线路、变压器等电力元件，有一个与主电网的公共连接点PCC。并且区域主站内集成本区域内网络拓扑信息，包括节点及支路，节点包括母线等电力元件分界点，支路包括线路、变压器等电力元件的电阻及电抗，网络拓扑信息描述为：Specifically, the centralized control system architecture of the present invention adopts a centralized architecture in which the regional master station is connected to multiple sub-stations, and the region communicates with the grid side stability control device. The function is to collect the adjustable information of the optical storage power station in the region and send it to The grid-side stability control device receives the power control command of the grid-side stability control device, and sends it to each sub-station of the optical storage power station after distribution by the regional master station; To the regional master station, receive the power control command of the regional master station and respond quickly; for the regional power grid, it is a radial power grid, including power components such as optical storage power stations, substations, lines, transformers, etc., and there is a public connection point PCC with the main power grid . And the regional master station integrates the network topology information in the region, including nodes and branches. Nodes include the dividing points of power components such as buses, and branches include the resistance and reactance of power components such as lines and transformers. The network topology information is described as:
Figure PCTCN2022119741-appb-000008
Figure PCTCN2022119741-appb-000008
其中，R ij+jX ij代表第i个光储站到公共连接点(PCC)链路上的第j个支路的电阻、电抗，上述公式中，每行为一个链路；ni代表第i个链路上支路的个数，1≤i≤m；m代表光储电站数量或者链路数量； Among them, R ij + jX ij represents the resistance and reactance of the j-th branch on the link from the i-th optical storage station to the point of common connection (PCC). In the above formula, each row is a link; ni represents the i-th The number of branches on the link, 1≤i≤m; m represents the number of optical storage power stations or the number of links;
结合图1所示，对于依据本发明所述方法实现的功率控制量分配，具体还包括如下过程：As shown in FIG. 1, for the distribution of the power control amount realized according to the method of the present invention, the following process is specifically included:
(S1)计算每个光储电站单位功率变化压差变化关系。(S1) Calculate the change relationship of pressure difference per unit power change of each photovoltaic storage power station.
首先根据区域电网网络拓扑，从末端第i个光储电站i开始，考虑单位功率P R、Q R变化，按照如下公式以此计算公式(1)中每个链路上第i节点到i+1节点压差变化: First, according to the network topology of the regional power grid, starting from the i-th optical storage power station i at the end, considering the change of the unit power P R and Q R , calculate the i-th node to i+ on each link in formula (1) according to the following formula 1 node differential pressure change:
Figure PCTCN2022119741-appb-000009
Figure PCTCN2022119741-appb-000009
其中，V R为额定电压，近似V R＝1，仅考虑有功控制时Q R＝0； Among them, VR is the rated voltage, approximately VR = 1, and Q R = 0 when only active power control is considered ;
通过上述计算方法，得到如下压差结算结果：Through the above calculation method, the following differential pressure settlement results are obtained:
Figure PCTCN2022119741-appb-000010
Figure PCTCN2022119741-appb-000010
(S2)计算每个光储电站单位功率变化灵敏度系数。(S2) Calculate the sensitivity coefficient of unit power change of each optical storage power station.
将中每个光储链路每个压差求和，即上述公式(3)中按行求和，得到如下结果：The sum of each pressure difference of each optical storage link, that is, the summation by row in the above formula (3), obtains the following result:
Figure PCTCN2022119741-appb-000011
Figure PCTCN2022119741-appb-000011
将上述公式标幺化得到不同光储电站的功率电压灵敏度系数：The power and voltage sensitivity coefficients of different photovoltaic storage power stations are obtained by standardizing the above formula:
Figure PCTCN2022119741-appb-000012
Figure PCTCN2022119741-appb-000012
在上述公式基础上计算光储电站功率选择灵敏度系数：Calculate the power selection sensitivity coefficient of the optical storage power station based on the above formula:
Figure PCTCN2022119741-appb-000013
Figure PCTCN2022119741-appb-000013
(S3)区域主站根据从稳定控制主站接收到的功率控制命令，如需要降低P ref。则各个光储电站分配的功率计算方法如下： (S3) The regional master station reduces Pref if necessary according to the power control command received from the stability control master station. Then the calculation method of the power allocated by each PV-storage station is as follows:
Figure PCTCN2022119741-appb-000014
Figure PCTCN2022119741-appb-000014
上述方案中，所述步骤(S3)中，若计算得到的光储电站需降功率量P i大于光储电站的最大可降低量P jdown max，则该站功率分配功率为P jdown max，同时重新选择分配功率，计算方法如下： In the above scheme, in the step (S3), if the calculated power reduction P i of the optical storage power station is greater than the maximum reduceable amount P jdown max of the optical storage power station, then the power allocation power of the station is P jdown max , and at the same time To re-select the allocated power, the calculation method is as follows:
Figure PCTCN2022119741-appb-000015
Figure PCTCN2022119741-appb-000015
若后续此选择过程中仍出现上述问题，则按照上述方法重新计算功率分配量，直到所有的光储电站分配功率确定。If the above problems still occur in the subsequent selection process, recalculate the power allocation amount according to the above method until the allocated power of all optical storage power stations is determined.
以下结合图2所示对本发明作进一步说明。当电网侧稳定控制装置出于紧急控制需求，需要本区域降低或提升功率时，区域主站根据降低或提供功率大小，再根据本区域网络拓扑信息，计算本区域内最优功率控制量分配。以含有五个光储电站的区域电网(图2所示)为例说明具体实施方式。The present invention will be further described below in conjunction with what is shown in FIG. 2 . When the grid-side stability control device needs to reduce or increase the power in the region due to emergency control needs, the regional master station calculates the optimal power control amount allocation in the region according to the reduced or provided power, and then according to the network topology information in the region. The specific implementation will be described by taking a regional power grid (shown in FIG. 2 ) containing five solar-storage power stations as an example.
首先形成网络拓扑，根据区域电网支路电阻、电抗信息，拓扑信息描述如下：Firstly, the network topology is formed. According to the branch circuit resistance and reactance information of the regional power grid, the topology information is described as follows:
Figure PCTCN2022119741-appb-000016
Figure PCTCN2022119741-appb-000016
上述拓扑描述中，每个光储到PCC点一个链路，一共含有五个链路。队友各个光储电站功率控制量分配计算，得到如下的结果。In the above topology description, there is one link from each optical storage to the PCC point, and there are five links in total. The distribution calculation of the power control amount of each solar-storage power station of teammates, the following results are obtained.
步骤(S1)计算每个光储电站单位功率变化压差变化关系中，根据公式(1)和公式(2)，得到如下压差结算结果：Step (S1) In calculating the pressure difference change relationship of each photovoltaic storage power station unit power change, according to formula (1) and formula (2), the following pressure difference settlement results are obtained:
Figure PCTCN2022119741-appb-000017
Figure PCTCN2022119741-appb-000017
步骤(S2)计算每个光储电站单位功率变化灵敏度系数中，根据公式(3)和公式(4)，将中每个光储链路每个压差求和，步骤(S1)中的计算结果按行求和，得到如下结果：Step (S2) calculates the unit power change sensitivity coefficient of each optical-storage station, according to formula (3) and formula (4), sums each pressure difference of each optical-storage link, and the calculation in step (S1) The results are summed row by row to get the following result:
Figure PCTCN2022119741-appb-000018
Figure PCTCN2022119741-appb-000018
将上述公式标幺化得到不同光储电站的功率电压灵敏度系数，得到如下表达式：The power and voltage sensitivity coefficients of different photovoltaic storage power stations are obtained by per unitizing the above formulas, and the following expressions are obtained:
Figure PCTCN2022119741-appb-000019
Figure PCTCN2022119741-appb-000019
在上述公式基础上计算光储电站功率选择灵敏度系数，得到如下的表达式：On the basis of the above formula, the power selection sensitivity coefficient of the optical storage power station is calculated, and the following expression is obtained:
Figure PCTCN2022119741-appb-000020
Figure PCTCN2022119741-appb-000020
根据步骤(S3)，区域主站根据从稳定控制主站接收到的功率控制命令，如需要降低P ref。则各个光储电站分配的功率计算结果如下： According to step (S3), the regional master lowers Pref if necessary according to the power control command received from the stability control master. Then the calculation results of the power allocated by each photovoltaic storage power station are as follows:
Figure PCTCN2022119741-appb-000021
Figure PCTCN2022119741-appb-000021
基于步骤(S3)，若计算得到的光储电站需降功率量P i＝0.45大于光储电站的最大可降低量P jdown max＝0.4，则该站功率分配功率为P jdown max，同时重新选择分配功率，去掉上述结果中的第5行并加权处理，得到如下结果： Based on step (S3), if the calculated power reduction amount P i = 0.45 of the optical storage power station is greater than the maximum reduction amount P jdown max = 0.4 of the optical storage power station, then the power allocation power of the station is P jdown max , and at the same time reselect Allocating power, removing row 5 in the above results and weighting, the following results are obtained:
Figure PCTCN2022119741-appb-000022
Figure PCTCN2022119741-appb-000022
Figure PCTCN2022119741-appb-000023
Figure PCTCN2022119741-appb-000023
则五个光储站分配的功率分为分别0.20、0.13、0.15、0.13、0.4。和功率约等于1，误差来源于计算时小数截取。Then the power allocated by the five optical storage stations is divided into 0.20, 0.13, 0.15, 0.13, and 0.4 respectively. The sum power is approximately equal to 1, and the error comes from decimal interception during calculation.
依据本发明所述的方法，结合上述实施例中的计算结果，对应的光储电站群参与电网稳定控制的策略及对应的区域主站功率分配得到如图2所示。According to the method of the present invention, combined with the calculation results in the above-mentioned embodiments, the strategy for the corresponding PV-storage power station group to participate in the grid stability control and the corresponding power distribution of the regional master station are obtained as shown in FIG. 2 .

Claims (5)

  1. 一种光储电站群参与电网稳定控制的功率分配方法，其特征在于，所述方法基于区域主站和子站的集中式控制***架构，在区域主站内集成本区域内网络拓扑信息及光储电站功率控制信息，包括建立导纳矩阵评估光储电站功率发生改变后***光储节点电压变化，根据电压变化灵敏度信息及总控制功率大小信息，分配功率控制量并发送到不同的光储电站，且包括如下计算过程：A power distribution method for a group of optical-storage power stations to participate in power grid stability control, characterized in that the method is based on a centralized control system architecture of a regional master station and sub-stations, and integrates network topology information and optical-storage power stations in the region in the regional master station Power control information, including the establishment of an admittance matrix to evaluate the voltage change of the system's optical storage node after the power of the optical storage power station changes, according to the voltage change sensitivity information and the total control power information, the power control amount is allocated and sent to different optical storage stations, and Including the following calculation process:
    (1)基于区域主站、子站集中式控制***架构，建立本区域电网网络拓扑信息，其表达式如下所示：(1) Based on the centralized control system architecture of the regional master station and substations, establish the network topology information of the regional power grid, and its expression is as follows:
    Figure PCTCN2022119741-appb-100001
    Figure PCTCN2022119741-appb-100001
    其中，R ij+jX ij代表第i个光储站到公共连接点链路上的第j个支路的电阻、电抗，上述公式中，每行为一个链路；ni代表第i个链路上支路的个数，1≤i≤m；m代表光储电站数量或者链路数量； Among them, R ij + jX ij represents the resistance and reactance of the j-th branch on the link from the i-th optical storage station to the common connection point. In the above formula, each row is a link; ni represents the The number of branches, 1≤i≤m; m represents the number of optical storage power stations or the number of links;
    (2)首先根据区域电网网络拓扑，从末端第i个光储电站i开始，考虑单位功率P R、Q R变化，计算每个光储电站单位功率变化压差变化关系； (2) First, according to the network topology of the regional power grid, starting from the i-th optical storage power station i at the end, considering the change of unit power P R and Q R , calculate the relationship between the unit power change and pressure difference of each optical storage power station;
    每个链路上第i节点到i+1节点压差变化计算公式如下所示：The formula for calculating the pressure difference change from node i to node i+1 on each link is as follows:
    Figure PCTCN2022119741-appb-100002
    Figure PCTCN2022119741-appb-100002
    其中，V R为额定电压，近似V R＝1，仅考虑有功控制时Q R＝0； Among them, VR is the rated voltage, approximately VR = 1, and Q R = 0 when only active power control is considered ;
    通过上述计算方法，得到如下压差结算结果：Through the above calculation method, the following differential pressure settlement results are obtained:
    Figure PCTCN2022119741-appb-100003
    Figure PCTCN2022119741-appb-100003
    (3)计算每个光储电站单位功率变化灵敏度系数，将每个光储链路每个压差求和，得到如下表达式：(3) Calculate the sensitivity coefficient of unit power change of each optical storage power station, and sum each pressure difference of each optical storage link to obtain the following expression:
    Figure PCTCN2022119741-appb-100004
    Figure PCTCN2022119741-appb-100004
    将上述公式标幺化得到不同光储电站的功率电压灵敏度系数，其表达式如下：The power and voltage sensitivity coefficients of different solar-storage power stations are obtained by standardizing the above formulas, and the expressions are as follows:
    Figure PCTCN2022119741-appb-100005
    Figure PCTCN2022119741-appb-100005
    计算光储电站功率选择灵敏度系数，得到如下表达式：Calculate the power selection sensitivity coefficient of the photovoltaic storage power station, and get the following expression:
    Figure PCTCN2022119741-appb-100006
    Figure PCTCN2022119741-appb-100006
    (4)区域主站根据从稳定控制主站接收到的功率控制命令，对于降低P ref，各个光储电站分配的功率计算方法如下所示： (4) According to the power control command received from the stability control master station, the regional master station, for reducing Pre ref , the calculation method of the power allocated by each optical storage power station is as follows:
    Figure PCTCN2022119741-appb-100007
    Figure PCTCN2022119741-appb-100007
  2. 根据权利要求1所述的光储电站群参与电网稳定控制的功率分配方法，其特征在于：所述步骤(4)中，若计算得到的光储电站需降功率量P i大于光储电站的最大可降低量P jdown max，则该站功率分配功率为P jdown max，同时重新选择分配功率，计算方法如下所示： According to claim 1, the power distribution method for the photovoltaic storage power station group to participate in the grid stability control is characterized in that: in the step (4), if the calculated power reduction P i of the photovoltaic storage power station is greater than that of the photovoltaic storage power station The maximum amount that can be reduced is P jdown max , then the station’s power allocation power is P jdown max , and at the same time reselects the allocation power. The calculation method is as follows:
    Figure PCTCN2022119741-appb-100008
    Figure PCTCN2022119741-appb-100008
    若在此选择过程中仍出现上述问题，则重新计算功率分配量，直到所有的光储电站分配功率确定。If the above problems still occur during the selection process, recalculate the power allocation amount until the allocated power of all optical storage power stations is determined.
  3. 根据权利要求1所述的光储电站群参与电网稳定控制的功率分配方法，其特征在于：该方法基于区域主站和子站的集中式控制***架构，在区域主站内集成本区域内网络拓扑信息及光储电站功率控制信息，当电网侧稳定控制装置出于紧急控制需求，需要本区域降低或者提升功率时，区域主站根据降低或者提高功率大小，再根据本区域电网网络拓扑信息，计算本区域内最优功率控制量分配。According to claim 1, the power distribution method for the photovoltaic storage power station group to participate in the grid stability control is characterized in that: the method is based on the centralized control system architecture of the regional master station and sub-stations, and integrates the network topology information in the region in the regional master station and the power control information of the photovoltaic storage power station. When the grid-side stability control device needs to reduce or increase the power in the region due to emergency control needs, the regional master station calculates the power according to the power reduction or increase, and then according to the network topology information of the regional power grid. Optimal distribution of power control amount in the region.
  4. 根据权利要求3所述的光储电站群参与电网稳定控制的功率分配方法，其特征在于：所述方法基于集中式架构，区域主站与电网侧稳定控制装置通信，汇集本区域内光储电站可调节信息并发送到电网侧稳定控制装置，接收电网侧稳定 控制装置功率控制命令，在区域主站分配后发送到各个光储电站子站；光储电站子站评估本站可下调及上调功率并发送到区域主站，接收区域主站的功率控制命令并快速响应；所述的可调节信息包括可下调功率即可上调功率。According to claim 3, the power distribution method for the photovoltaic storage power station group to participate in the grid stability control is characterized in that: the method is based on a centralized architecture, and the regional master station communicates with the grid side stability control device to gather the photovoltaic storage power stations in the region The information can be adjusted and sent to the grid-side stability control device, receiving the power control command of the grid-side stability control device, and sending it to each sub-station of the optical storage power station after distribution by the regional main station; And send it to the regional main station, receive the power control command of the regional main station and respond quickly; the adjustable information includes that the power can be adjusted down or the power can be adjusted up.
  5. 根据权利要求4所述的光储电站群参与电网稳定控制的功率分配方法，其特征在于：所述方法中的区域电网为辐射状电网，电力元件包括光储电站、变电站、线路和变压器，且存在与主电网的公共连接点PCC。According to claim 4, the power distribution method for the group of optical storage power stations to participate in grid stability control is characterized in that: the regional power grid in the method is a radial grid, and the power components include optical storage power stations, substations, lines and transformers, and There is a point of common connection PCC with the main grid.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5571475B2 (en) * 2010-06-21 2014-08-13 株式会社日立製作所 New energy power plant group control system and control method thereof
JP6070076B2 (en) * 2012-10-31 2017-02-01 富士電機株式会社 Distribution system voltage control device, voltage control system, voltage control program, and voltage control method
RU2551133C1 (en) * 2014-02-06 2015-05-20 Леонид Абрамович Герман Voltage regulation method at alternating-current electric-traction netware
CN108777493B (en) * 2018-07-24 2020-12-15 杭州电子科技大学 Sensitivity matrix-based low-voltage microgrid secondary voltage control method
CN109787282B (en) * 2019-01-29 2022-09-02 国电南瑞科技股份有限公司 Large-scale energy storage participation new energy station reactive power coordination control method and system
CN111064179B (en) * 2019-10-22 2021-04-27 国网山东省电力公司电力科学研究院 Comprehensive control method and system for ensuring voltage safety in power recovery stage of multi-feed-in direct current system
CN112018798B (en) * 2020-08-29 2022-04-15 燕山大学 Multi-time scale autonomous operation method for power distribution network with regional energy storage station participating in disturbance stabilization
CN114421526A (en) * 2022-01-20 2022-04-29 国网经济技术研究院有限公司 Distributed photovoltaic multi-cluster voltage control method and system and storage medium
CN114629165A (en) * 2022-03-14 2022-06-14 新疆大学 Power distribution method for participating in power grid stability control of optical storage power station group

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116341883A (en) * 2023-05-31 2023-06-27 北京智芯微电子科技有限公司 Resource coordination method and system for photovoltaic grid-connected switch
CN116341883B (en) * 2023-05-31 2023-11-17 北京智芯微电子科技有限公司 Resource coordination method and system for photovoltaic grid-connected switch

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