CN-122017492-A - Partial discharge position determining method and device for transformer substation simulation platform

CN122017492ACN 122017492 ACN122017492 ACN 122017492ACN-122017492-A

Abstract

The application discloses a partial discharge position determining method and device for a transformer substation simulation platform. The method comprises the steps of collecting partial discharge signals of a substation simulation platform under a target partial discharge condition, wherein the partial discharge signals at least comprise a first partial discharge signal, a second partial discharge signal and a third partial discharge signal, determining a first partial discharge position of the substation simulation platform under the target partial discharge condition based on the first partial discharge signal and the second partial discharge signal, wherein the first partial discharge position is one of a simulation transformer side and a simulation gas-insulated switchgear side, and determining the target partial discharge position of the substation simulation platform under the target partial discharge condition based on the first partial discharge position and the third partial discharge signal. The method solves the technical problem of low accuracy of the partial discharge position determination result of the transformer substation simulation platform in the related technology.

Inventors

HE NAN
LI HONGDA
CAO BAOQIN
DUAN DAPENG
LI XIANGLONG
WANG DAWEI
LIU HONGJING
YAN CHUNJIANG
MIAO WANG
NIE WEIGANG

Assignees

国网北京市电力公司

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (10)

1. The partial discharge position determining method for the substation simulation platform is characterized by comprising the following steps of: Collecting partial discharge signals of a substation simulation platform under a target partial discharge condition, wherein the partial discharge signals at least comprise a first partial discharge signal of a simulation transformer included in the substation simulation platform, a second partial discharge signal of a simulation gas-insulated switchgear included in the substation simulation platform and a third partial discharge signal of a cable included in the substation simulation platform; Determining a first partial discharge position of the substation simulation platform on the target partial discharge condition based on the first partial discharge signal and the second partial discharge signal, wherein the first partial discharge position is one of a simulation transformer side and a simulation gas-insulated switchgear side; And determining a target partial discharge position of the substation simulation platform under the target partial discharge condition based on the first partial discharge position and the third partial discharge signal.
2. The method of claim 1, wherein prior to the collecting partial discharge signals of the substation simulation platform at the target partial discharge conditions, the method further comprises: Determining first size information and first structure information of a target transformer included in a target substation, and second size information and second structure information of target gas-insulated switchgear included in the target substation; And constructing the substation simulation platform based on the first size information, the first structure information, the second size information, the second structure information and a preset scaling.
3. The method of claim 1, wherein the determining a first partial discharge location of the substation simulation platform at the target partial discharge condition based on the first partial discharge signal and the second partial discharge signal comprises: Determining a neutral point signal frequency bandwidth of a neutral point signal included in the first partial discharge signal and a second partial discharge signal frequency bandwidth of the second partial discharge signal, wherein the neutral point signal is acquired from a neutral point of the analog transformer, and the neutral point is an electrical connection point between the analog transformer and the ground; determining the first partial discharge position as the analog transformer side in the case where the neutral point signal frequency bandwidth is smaller than the second partial discharge signal frequency bandwidth; And determining the first partial discharge position as the analog gas-insulated switchgear side in the case that the neutral point signal frequency bandwidth is greater than or equal to the second partial discharge signal frequency bandwidth.
4. The method according to claim 1, wherein, in case the first partial discharge position is the simulated gas insulated switchgear side, the determining a target partial discharge position of the substation simulation platform at the target partial discharge condition based on the first partial discharge position and the third partial discharge signal comprises: Determining a first cable signal frequency bandwidth of a first cable signal included in the third partial discharge signal, and a second partial discharge signal frequency bandwidth of the second partial discharge signal, wherein the first cable signal is used for describing a high-frequency current change flowing through a ground wire of the cable; determining the target partial discharge location as a cable jacket of the cable if the first cable signal bandwidth is less than the second partial discharge signal bandwidth; and determining the target partial discharge position as a housing of the analog gas-insulated switchgear in the case where the first cable signal frequency bandwidth is greater than or equal to the second partial discharge signal frequency bandwidth.
5. The method of claim 1, wherein, in the case where the first partial discharge location is the analog transformer side, the determining a target partial discharge location of the substation analog platform at the target partial discharge condition based on the first partial discharge location and the third partial discharge signal comprises: detecting a first iron core signal included in the first partial discharge signal to obtain a first detection result, wherein the first iron core signal is used for describing high-frequency discharge activity characteristics of an iron core area of the analog transformer, and the first detection result is used for judging whether a discharge pulse waveform exists in the first iron core signal; Detecting a second iron core signal included in the first partial discharge signal to obtain a second detection result, wherein the second iron core signal is used for describing high-frequency current variation propagated through an iron core grounding wire of the analog transformer, and the second detection result is used for judging whether a discharge pulse waveform exists in the second iron core signal; Determining a second partial discharge position of the substation simulation platform under the target partial discharge condition based on the first detection result and the second detection result, wherein the second partial discharge position is one of the inside of the simulation transformer and the outside of the simulation transformer; The target partial discharge position is determined based on the second partial discharge position and the third partial discharge signal.
6. The method of claim 5, wherein, in the case where the second partial discharge location is external to the analog transformer, the determining the target partial discharge location based on the second partial discharge location and the third partial discharge signal comprises: determining a tank wall signal frequency bandwidth of a tank wall signal included in the first partial discharge signal, and a first cable signal frequency bandwidth of a first cable signal included in the third partial discharge signal, wherein the tank wall signal is used for describing electromagnetic radiation characteristics generated by partial discharge activity near a tank wall of the analog transformer, and the first cable signal is used for describing high-frequency current changes of a ground wire flowing through the cable; Determining the target partial discharge location as the housing of the analog transformer if the tank wall signal bandwidth is less than the first cable signal bandwidth; And determining the target partial discharge position as a cable side in the case that the tank wall signal frequency bandwidth is greater than or equal to the first cable signal frequency bandwidth.
7. The method according to any one of claims 1 to 6, further comprising: Detecting a first cable signal included in the third partial discharge signal to obtain a third detection result, wherein the third detection result is used for judging whether a discharge pulse waveform exists in the first cable signal, and the first cable signal is used for describing high-frequency current change of a grounding wire flowing through the cable; Detecting a second cable signal included in the third partial discharge signal to obtain a fourth detection result, wherein the fourth detection result is used for judging whether a discharge pulse waveform exists in the second cable signal, and the second cable signal is used for describing the change of high-frequency current flowing through the cable; Determining a third partial discharge position of the substation simulation platform in the target partial discharge condition based on the third detection result and the fourth detection result, wherein the third partial discharge position is one of an interior of the cable, a cable jacket of the cable, and an interior of the simulation transformer or an interior of the simulation gas-insulated switchgear; the target partial discharge position is determined based on the third partial discharge position, the first partial discharge signal, and the second partial discharge signal.
8. The method of claim 7, wherein, in the case where the third partial discharge location is an interior of the analog transformer or an interior of the analog gas-insulated switchgear, the determining the target partial discharge location based on the third partial discharge location, the first partial discharge signal, and the second partial discharge signal comprises: Determining a neutral point signal frequency bandwidth of a neutral point signal included in the first partial discharge signal and a second partial discharge signal frequency bandwidth of the second partial discharge signal, wherein the neutral point signal is acquired from a neutral point of the analog transformer, and the neutral point is an electrical connection point between the analog transformer and the ground; Determining the target partial discharge position as the inside of the analog transformer in the case that the neutral point signal frequency bandwidth is smaller than the second partial discharge signal frequency bandwidth; And determining the target partial discharge position as the inside of the analog gas-insulated switchgear in the case that the neutral point signal frequency bandwidth is greater than or equal to the second partial discharge signal frequency bandwidth.
9. A partial discharge position determining device of a substation simulation platform, comprising: The data acquisition module is used for acquiring partial discharge signals of the substation simulation platform under a target partial discharge condition, wherein the partial discharge signals at least comprise a first partial discharge signal of a simulation transformer included in the substation simulation platform, a second partial discharge signal of a simulation gas-insulated switching device included in the substation simulation platform and a third partial discharge signal of a cable included in the substation simulation platform; The first determining module is used for determining a first partial discharge position of the substation simulation platform under the target partial discharge condition based on the first partial discharge signal and the second partial discharge signal, wherein the first partial discharge position is one of a simulation transformer side and a simulation gas-insulated switchgear side; And the second determining module is used for determining a target partial discharge position of the substation simulation platform under the target partial discharge condition based on the first partial discharge position and the third partial discharge signal.
10. A non-volatile storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to perform the partial discharge position determination method of a substation simulation platform according to any of claims 1 to 8.

Description

Partial discharge position determining method and device for transformer substation simulation platform Technical Field The application relates to the field of power systems, in particular to a partial discharge position determining method and device of a transformer substation simulation platform. Background With the continuous development of power systems, transformers and GIS devices (gas insulated switchgear ) play an increasingly important role in the power grid. However, partial discharge phenomenon easily occurs in the running process of the equipment, and the service life of the equipment and the safe and stable running of a power grid are seriously affected. The partial discharge position of the transformer substation simulation platform can be determined by constructing the transformer substation simulation platform comprising the transformer and the GIS equipment and analyzing the partial discharge phenomenon of the transformer substation simulation platform, so that the partial discharge position of the transformer substation is determined. In the related art, based on the artificially applied partial discharge defect, the partial discharge position of the transformer substation simulation platform is detected, and because the model design of the transformer substation simulation platform aiming at the transformer and the GIS equipment is not accurate enough and the partial discharge phenomenon which can be simulated is limited, a larger error exists in the determination result of the partial discharge position of the transformer substation simulation platform. Therefore, the technical problem of low accuracy of the partial discharge position determination result of the substation simulation platform exists in the related art. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the application provides a method and a device for determining a partial discharge position of a transformer substation simulation platform, which are used for at least solving the technical problem of low accuracy of a partial discharge position determination result of the transformer substation simulation platform in the related technology. According to one aspect of the embodiment of the application, a partial discharge position determining method of a transformer substation simulation platform is provided, and the method comprises the steps of collecting partial discharge signals of the transformer substation simulation platform in a target partial discharge condition, wherein the partial discharge signals at least comprise first partial discharge signals of a simulation transformer included in the transformer substation simulation platform, second partial discharge signals of simulation gas-insulated switching equipment included in the transformer substation simulation platform and third partial discharge signals of cables included in the transformer substation simulation platform, determining the first partial discharge position of the transformer substation simulation platform in the target partial discharge condition based on the first partial discharge signals and the second partial discharge signals, wherein the first partial discharge position is one of a simulation transformer side and a simulation gas-insulated switching equipment side, and determining the target partial discharge position of the transformer substation simulation platform in the target partial discharge condition based on the first partial discharge position and the third partial discharge signals. According to another aspect of the embodiment of the application, a partial discharge position determining device of a transformer substation simulation platform is provided, which comprises a data acquisition module, a first determining module and a second determining module, wherein the data acquisition module is used for acquiring partial discharge signals of the transformer substation simulation platform in a target partial discharge condition, the partial discharge signals at least comprise first partial discharge signals of a simulation transformer included in the transformer substation simulation platform, second partial discharge signals of simulation gas-insulated switchgear included in the transformer substation simulation platform and third partial discharge signals of a cable included in the transformer substation simulation platform, the first determining module is used for determining the first partial discharge position of the transformer substation simulation platform in the target partial discharge condition based on the first partial discharge signals and the second partial discharge signals, the first partial discharge position is one of a simulation transformer side and a simulation gas-insulated switchgear side, and the second determining module is used for determining the target partial discharge position of the transformer substation simulation platform