CN-122026413-A - Method and device for determining influence parameters of transient stability of power system and electronic equipment

CN122026413ACN 122026413 ACN122026413 ACN 122026413ACN-122026413-A

Abstract

The invention discloses a method and a device for determining influence parameters of transient stability of a power system and electronic equipment. The method comprises the steps of obtaining an operation scene of an electric power system, determining a transient stability index and a plurality of target electric power parameters corresponding to the electric power system in the operation scene, determining a first causal relation and a second causal relation corresponding to the electric power system according to the plurality of target electric power parameters and the transient stability index, determining a plurality of influence chains according to the plurality of target electric power parameters, the first causal relation and the second causal relation, and determining a transient stability influence parameter corresponding to the electric power system according to the plurality of influence chains. The method solves the technical problem that in the related art, when the influence parameters of the transient stability of the power system are determined, the influence parameters of the transient stability of the power system are inaccurate to determine.

Inventors

DONG NAN
WANG HAIYUN
GUO QINGLAI
ZHOU YANZHEN
CAO SHUJUN
YANG LIPING
LU ZHONGYAN
CHEN QIAN
ZHAO WEIZHUO
WU YAN
SUN YIFEI
WANG CHUNLING
XIANG LIANG

Assignees

国网北京市电力公司
清华大学

Dates

Publication Date: 20260512
Application Date: 20260123

Claims (10)

1. A method for determining an impact parameter of transient stability of an electric power system, comprising: acquiring an operation scene of the power system; Determining a transient stability index corresponding to the power system and a plurality of target power parameters under the operation scene, wherein the transient stability index is used for indicating the operation stability degree of the power system after disturbance occurs, and the plurality of target power parameters are parameters for reflecting the operation state of the power system; determining a first causal relation and a second causal relation corresponding to the power system according to the plurality of target power parameters and the transient stability index, wherein the first causal relation is used for representing causal relation between any two target power parameters in the plurality of target power parameters, and the second causal relation is used for representing causal relation between the plurality of target power parameters and the transient stability index respectively; determining a plurality of influence chains according to the plurality of target power parameters, the first causal relationship and the second causal relationship; and determining transient stability influence parameters corresponding to the power system according to the influence chains.
2. The method of claim 1, wherein determining a plurality of target power parameters corresponding to the power system in the operational scenario comprises: Determining a plurality of initial power parameters corresponding to the power system under the operation scene; determining a first association index corresponding to each of the plurality of initial power parameters and a plurality of second association indexes corresponding to each of the plurality of initial power parameters, wherein the corresponding first association index is used for representing the association degree between the corresponding initial power parameter and the transient stability index, and the corresponding plurality of second association indexes are used for representing the association degree between the corresponding initial power parameter and other initial power parameters; and determining a plurality of target power parameters corresponding to the power system according to the first association indexes respectively corresponding to the plurality of initial power parameters and the second association indexes respectively corresponding to the plurality of initial power parameters.
3. The method of claim 2, wherein determining a plurality of target power parameters corresponding to the power system according to the first association indexes respectively corresponding to the plurality of initial power parameters and the second association indexes respectively corresponding to the plurality of initial power parameters comprises: determining a first parameter to be selected from the plurality of initial power parameters, wherein the first parameter to be selected is an initial power parameter with the largest first association index in the plurality of initial power parameters; According to the execution sequence of executing multiple times of screening on the multiple initial power parameters, determining a second parameter to be selected from the multiple first residual parameters according to first association indexes respectively corresponding to the multiple first residual parameters and second association indexes between the multiple first residual parameters and the first parameter to be selected, wherein the multiple first residual parameters are other initial power parameters except the first parameter to be selected in the multiple initial power parameters; Determining a third to-be-selected parameter from the plurality of second residual parameters according to first association indexes respectively corresponding to the plurality of second residual parameters and second association indexes between the plurality of second residual parameters and the second to-be-selected parameter, wherein the plurality of second residual parameters are other initial power parameters except the second to-be-selected parameter in the plurality of first residual parameters until the plurality of screening execution is completed, and obtaining a plurality of to-be-selected parameters corresponding to the power system; and determining a plurality of target power parameters corresponding to the power system according to the plurality of candidate parameters.
4. A method according to claim 3, wherein said determining a plurality of target power parameters corresponding to the power system in accordance with the plurality of candidate parameters comprises: Determining a power ratio corresponding to the power system according to the active power and the reactive power in the case that the plurality of parameters to be selected include the active power and the reactive power; And determining a plurality of target power parameters corresponding to the power system according to the power ratio and the plurality of parameters to be selected.
5. The method of claim 1, wherein determining transient stability impact parameters corresponding to the power system from the plurality of impact chains comprises: determining a plurality of target nodes corresponding to any influence chain in the influence chains according to the execution sequence of the influence chains, wherein the target nodes comprise first nodes respectively corresponding to the target power parameters and second nodes corresponding to the transient stability indexes; determining father nodes respectively corresponding to the target nodes; Determining a child influence parameter corresponding to any influence chain according to target node data corresponding to the target nodes and parent node data corresponding to parent nodes corresponding to the target nodes, wherein the child influence parameter is used for reflecting a transient stability parameter of the power system under any influence chain; Obtaining sub-influence parameters respectively corresponding to the influence chains until the execution of the influence chains is completed; and determining transient stability influence parameters corresponding to the power system according to the sub-influence parameters respectively corresponding to the influence chains.
6. The method according to claim 5, wherein determining the child influence parameter corresponding to the any influence chain according to the target node data corresponding to the plurality of target nodes and the parent node data corresponding to the parent node corresponding to the plurality of target nodes, respectively, includes: Determining prediction data corresponding to the target nodes according to parent node data corresponding to parent nodes corresponding to the target nodes respectively; determining data deviation values corresponding to the target nodes according to the target node data and the prediction data corresponding to the target nodes respectively; and determining the child influence parameters corresponding to any influence chain according to the data deviation values respectively corresponding to the target nodes and the parent node data corresponding to the parent nodes respectively corresponding to the target nodes.
7. The method according to any one of claims 1 to 6, wherein said determining a transient stability index corresponding to the power system in the operating scenario comprises: determining power angle difference indexes corresponding to a plurality of generator sets respectively under the operation scene, wherein the corresponding power angle difference indexes represent the difference degree of power angles between two generators included in the corresponding generator sets, and the electric power system comprises the plurality of generator sets; And determining transient stability indexes corresponding to the power system according to the power angle difference indexes respectively corresponding to the plurality of generator sets.
8. An influence parameter determining device for transient stability of an electric power system, comprising: the acquisition module is used for acquiring the operation scene of the power system; The first determining module is used for determining a transient stability index corresponding to the power system and a plurality of target power parameters in the operation scene, wherein the transient stability index is used for indicating the operation stability degree of the power system after disturbance occurs, and the plurality of target power parameters are parameters used for reflecting the operation state of the power system; The second determining module is used for determining a first causal relation and a second causal relation corresponding to the power system according to the plurality of target power parameters and the transient stability index, wherein the first causal relation is used for representing causal relations between any two target power parameters in the plurality of target power parameters, and the second causal relation is used for representing causal relations between the plurality of target power parameters and the transient stability index respectively; a third determining module configured to determine a plurality of impact chains according to the plurality of target power parameters, the first causal relationship, and the second causal relationship; And the fourth determining module is used for determining transient stability influence parameters corresponding to the power system according to the influence chains.
9. An electronic device, comprising: A processor; a memory for storing the processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method of determining an impact parameter of transient stability of a power system as claimed in any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that instructions in the computer readable storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method of determining an influencing parameter of the transient stability of a power system according to any one of claims 1 to 7.

Description

Method and device for determining influence parameters of transient stability of power system and electronic equipment Technical Field The invention relates to the field of power systems, in particular to a method and a device for determining influence parameters of transient stability of a power system and electronic equipment. Background In the related art, the transient stability of the power system is the capability of measuring whether the power system can transition to a new steady state or recover to an original steady state operation mode after being disturbed, and key basis can be provided for protection control strategy design, system structure optimization and operation mode adjustment of the power system by determining influence parameters of the transient stability of the power system. However, in the related art, when determining the influence parameters of the transient stability of the power system, there is a technical problem that the determination of the influence parameters of the transient stability of the power system is inaccurate. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the invention provides a method and a device for determining an influence parameter of transient stability of a power system and electronic equipment, which at least solve the technical problem that the determination of the influence parameter of transient stability of the power system is inaccurate when the influence parameter of transient stability of the power system is determined in the related technology. According to one aspect of the embodiment of the invention, an influence parameter determination method for transient stability of a power system is provided, and the influence parameter determination method comprises the steps of obtaining an operation scene of the power system, determining a transient stability index corresponding to the power system and a plurality of target power parameters in the operation scene, wherein the transient stability index is used for representing the operation stability degree of the power system after disturbance, the plurality of target power parameters are parameters used for reflecting the operation state of the power system, determining a first relation and a second relation corresponding to the power system according to the plurality of target power parameters and the transient stability index, wherein the first relation is used for representing a causal relation between any two target power parameters of the plurality of target power parameters, the second relation is used for representing a causal relation between the plurality of target power parameters and the transient stability index respectively, determining a plurality of influence chains according to the plurality of target power parameters, and determining a causal relation and a causal relation between the transient stability parameters corresponding to the power system according to the plurality of influence chains. Optionally, determining a plurality of target power parameters corresponding to the power system in the operation scene includes determining a plurality of initial power parameters corresponding to the power system in the operation scene, determining a first association index corresponding to the plurality of initial power parameters respectively, and a plurality of second association indexes corresponding to the plurality of initial power parameters respectively, wherein the corresponding first association index is used for representing association degrees between the corresponding initial power parameters and the transient stability index, the corresponding plurality of second association indexes are used for representing association degrees between the corresponding initial power parameters and other initial power parameters respectively, and determining a plurality of target power parameters corresponding to the power system according to the first association indexes corresponding to the plurality of initial power parameters respectively and the plurality of second association indexes corresponding to the plurality of initial power parameters respectively. Optionally, determining a plurality of target power parameters corresponding to the power system according to the first association indexes respectively corresponding to the plurality of initial power parameters and the second association indexes respectively corresponding to the plurality of initial power parameters, wherein the first parameter to be selected is an initial power parameter with the largest first association index in the plurality of initial power parameters; according to the execution sequence of executing multiple times of screening on the multiple initial power parameters, determining a second to-be-selected parameter from the multiple first to-be-selected parameters according to first association indexes respectively corresponding to the mu