CN-122026348-A - Oscillation stability control method, device, equipment and storage medium applied to black start process of power system

CN122026348ACN 122026348 ACN122026348 ACN 122026348ACN-122026348-A

Abstract

The invention discloses an oscillation stability control method, device, equipment and storage medium applied to the black start process of an electric power system, which are applied to the technical field of operation control of the electric power system, wherein the method comprises the steps of obtaining control parameter data of the electric power system; the method comprises the steps of obtaining output power of grid-connected equipment and operation parameter data of an electric system, processing the obtained output power of the grid-connected equipment and the operation parameter data of the electric system to obtain target damping ratio data, processing control parameter data by using a heuristic optimization technology with the maximized target damping ratio data as a first target function to obtain a first control parameter vector, analyzing an oscillation stability index and a preset damping ratio limit value to determine an oscillation stability index sequence of the electric system, processing the oscillation stability index sequence with the minimized operation parameter data as a second target function to obtain a system operation control scheme, and executing the system operation control scheme. The method provided by the invention can improve the oscillation stability level of the power system in the process of strong time-varying operation such as black start.

Inventors

MA JUNCHAO
QU HEZUO
KONG FANFANG
HU CHANGHONG
LIU JINYUAN
CHEN MENGXIANG
LU QIANYI
ZHU QIWEI
CHEN YANG
YANG JIAN
HUANG DATIE
SUN JINGLIAO
ZANG YINING
XIANG YEJUN
PENG YAN
XI HONGLEI
YU KAI
LU CHENGYU
PAN XING
WANG CHENXU

Assignees

国网浙江省电力有限公司温州供电公司
国网浙江省电力有限公司电力科学研究院

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. The oscillation stability control method applied to the black start process of the power system is characterized by comprising the following steps of: acquiring control parameter data of a target power system, wherein the control parameter data are used for controlling a plurality of grid-connected devices; carrying out power flow coupling processing on the acquired output power of the grid-connected equipment and the operation parameter data of the target power system to construct a state matrix of the target power system; the target damping ratio data is minimized to serve as a first target function, and heuristic optimization technology is utilized to process the control parameter data to obtain a first control parameter vector; analyzing an oscillation stability index obtained by mapping the first control parameter vector and a preset damping ratio limit value, and determining an oscillation stability index sequence of the target power system based on an analysis result; The operation parameter data is minimized to serve as a second objective function, and the oscillation stability index sequence is processed by utilizing an analysis optimization technology, so that a system operation control scheme of the target power system is obtained; Executing the system operation control scheme.
2. The oscillation stability control method applied to the black start process of the power system according to claim 1, wherein the performing load flow coupling processing on the acquired output powers of the plurality of grid-connected devices and the operation parameter data of the target power system to construct a state matrix of the target power system includes: Based on node power balance, processing the output power of a plurality of grid-connected devices and the operation parameter data of the target power system to obtain a nonlinear power flow equation set; and carrying out linearization analysis processing on the nonlinear power flow equation set to obtain a state matrix of the target power system.
3. The method for controlling oscillation stability during a black start of an electric power system according to claim 1, wherein the processing the control parameter data by using a heuristic optimization technique to obtain a first control parameter vector comprises: Coding the control parameter data to obtain data to be optimized of the target power system; And performing iterative evolutionary processing on the data to be optimized by using a heuristic optimization technology to obtain the first control parameter vector.
4. The oscillation stability control method applied to the black start process of the electric power system according to claim 1, wherein the analyzing the oscillation stability index obtained by mapping the first control parameter vector with a preset damping ratio limit value, determining the oscillation stability index sequence of the target electric power system based on the analysis result, includes: based on a simulation technology, mapping the first control parameter vector by using state space modeling to obtain the oscillation stability index; performing threshold value comparison analysis processing on the oscillation stability index and the preset damping ratio limit value to obtain the analysis result; and carrying out serialization discrete processing on the analysis result to obtain the oscillation stability index sequence.
5. The oscillation stability control method applied to the black start process of the electric power system according to claim 1, wherein the processing the oscillation stability index sequence by using the analytical optimization technology to obtain the system operation control scheme of the target electric power system comprises the following steps: Processing the oscillation stability index sequence by utilizing an analysis optimization technology to obtain an operation point set; and performing convergence verification processing on the operation point set to obtain a system operation control scheme of the target power system.
6. The method for controlling oscillation stability during a black start of an electric power system according to claim 5, wherein said performing convergence verification on said set of operating points to obtain a system operation control scheme of said target electric power system comprises Performing convergence verification processing on the operation point set to obtain candidate operation points; and performing solution selection processing on the candidate operating points by utilizing a decision technology based on an optimization state to obtain a system operation control scheme of the target power system.
7. The oscillation stability control method applied to a black start process of an electric power system according to claim 1, wherein in executing the system operation control scheme, the oscillation stability control method applied to a black start process of an electric power system further comprises: performing stability re-evaluation processing on the obtained execution result to obtain a current stable state identifier of the target power system; And analyzing the current stable state identifier by utilizing a logic analysis technology to obtain a logic control result.
8. An oscillation stability control device applied to a black start process of an electric power system, comprising: The system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring control parameter data of a target power system, and the control parameter data are used for controlling a plurality of grid-connected devices; The coupling module is used for carrying out tide coupling processing on the acquired output power of the grid-connected equipment and the operation parameter data of the target power system to construct a state matrix of the target power system; The processing module is used for processing the control parameter data by using a heuristic optimization technology with the minimized target damping ratio data as a first objective function to obtain a first control parameter vector; the analysis module is used for analyzing the oscillation stability index obtained by mapping the first control parameter vector and a preset damping ratio limit value, and determining an oscillation stability index sequence of the target power system based on an analysis result; The optimizing module is used for processing the oscillation stability index sequence by using an analytical optimizing technology with the minimized operation parameter data as a second objective function to obtain a system operation control scheme of the target power system; and the execution module is used for executing the system operation control scheme.
9. An oscillation stability control device for use in a black start process of an electric power system, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the oscillation stability control method for use in a black start process of an electric power system according to any one of claims 1 to 7 when the computer program is executed by the processor.
10. A computer readable storage medium, wherein the computer readable storage medium stores a computer program, and wherein the oscillation stability control method applied to the black start process of the electric power system according to any one of claims 1 to 7 is implemented when the computer program is executed by a device in which the computer readable storage medium is located.

Description

Oscillation stability control method, device, equipment and storage medium applied to black start process of power system Technical Field The present invention relates to the field of operation control technology of an electric power system, and in particular, to a method, an apparatus, a device, and a storage medium for controlling oscillation stability in a black start process of an electric power system. Background For the power system with high-proportion new energy access in coastal areas, the running state of the power system has stronger time-varying property compared with the conventional power system, and particularly, the black start process after the blackout is caused by extreme meteorological conditions. In the black start process, the power grid has weak strength and poor voltage/frequency supporting capability, and dynamic interaction among grid-connected units such as new energy power generation, an energy storage system, a conventional unit and the like can cause different types of oscillation stability problems, so that the system operation safety is influenced, and black start failure and corresponding economic and social losses are caused. In the prior art, the conventional oscillation stability control technology is realized by unilaterally adjusting the system running state or independently optimizing the control parameters of certain grid-connected equipment, and the technical path is derived from a traditional power system mainly comprising a synchronous unit, and the adjustment of the system running state and the dynamic process of the equipment are separated on a time scale and can be independently carried out. However, the new energy power generation fluctuation and the rapid control dynamics of the power electronic equipment are highly coupled on a time scale, the running state of the system and the control characteristics of the equipment can be mutually influenced, and the stability of the system is commonly dominant, so that the efficiency and the effect of the oscillation stability control are insufficient in the strong time-varying process such as black start by the conventional oscillation stability control technology, the optimization and adjustment space is limited, the flexible adjustment potential of the power electronic equipment cannot be fully utilized, the system stability margin is finally limited, and the risk of black start failure is increased. Disclosure of Invention The invention provides an oscillation stability control method, device, equipment and storage medium applied to a black start process of an electric power system, which are used for solving the technical problems that the efficiency and effect of oscillation stability control are insufficient, the optimization and adjustment space is limited and the flexible adjustment potential of power electronic equipment cannot be fully utilized in the current strong time-varying process of the black start and the like of the electric power system, so as to improve the oscillation stability level of the system in the strong time-varying operation process of the black start and the like. In order to solve the technical problems, the invention provides an oscillation stability control method applied to a black start process of an electric power system, which comprises the following steps: acquiring control parameter data of a target power system, wherein the control parameter data are used for controlling a plurality of grid-connected devices; carrying out power flow coupling processing on the acquired output power of the grid-connected equipment and the operation parameter data of the target power system to construct a state matrix of the target power system; the target damping ratio data is minimized to serve as a first target function, and heuristic optimization technology is utilized to process the control parameter data to obtain a first control parameter vector; analyzing an oscillation stability index obtained by mapping the first control parameter vector and a preset damping ratio limit value, and determining an oscillation stability index sequence of the target power system based on an analysis result; The operation parameter data is minimized to serve as a second objective function, and the oscillation stability index sequence is processed by utilizing an analysis optimization technology, so that a system operation control scheme of the target power system is obtained; Executing the system operation control scheme. As one preferable solution, the performing load flow coupling processing on the acquired output powers of the grid-connected devices and the operation parameter data of the target power system to construct a state matrix of the target power system, including: Based on node power balance, processing the output power of a plurality of grid-connected devices and the operation parameter data of the target power system to obtain a nonlinear power flow equation set; and carrying out linearization a