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Lightning arrester operation state identification method and device based on online monitoring data

A technology of monitoring data and identification method, which is applied in the field of lightning arrester operating state identification based on online monitoring data, can solve the problems of being easily affected by phase-to-phase interference and harmonic interference, and achieve the effect of real-time monitoring

Active Publication Date: 2021-12-14
JIEYANG POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of online monitoring of arresters is that it can continuously track the operating resistive current and full current of arresters, which can provide a basis for the formulation of test plans, but there are still problems of being susceptible to phase-to-phase interference and harmonic interference

Method used

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  • Lightning arrester operation state identification method and device based on online monitoring data
  • Lightning arrester operation state identification method and device based on online monitoring data
  • Lightning arrester operation state identification method and device based on online monitoring data

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Embodiment 1

[0027] figure 1 It is a flowchart of a method for identifying the operating state of an arrester based on online monitoring data provided by Embodiment 1 of the present invention. This embodiment is applicable to monitoring the operating state of an arrester, and the method can be executed by a device for identifying the operating state of an arrester. Specifically Including the following steps:

[0028] S110. Obtain the online monitoring data of the arrester, the online monitoring data at least include the online data sequence of the total distortion rate of the arrester leakage current, the online data sequence of the total harmonic distortion rate of the arrester voltage, the online data sequence of the full current of the arrester leakage current and the online data sequence of the arrester leakage current resistive current data sequence.

[0029] Among them, the total harmonic distortion rate of arrester voltage can be understood as a parameter used to measure the degree...

Embodiment 2

[0042] This embodiment is refined on the basis of the above-mentioned embodiments, figure 2 It is a flow chart of a method for identifying the operating state of an arrester based on online monitoring data provided by Embodiment 2 of the present invention. Refer to figure 2 , the method includes:

[0043] S210. Obtain the online monitoring data of the arrester, the online monitoring data at least include the online data sequence of the total distortion rate of the arrester leakage current, the online data sequence of the total harmonic distortion rate of the arrester voltage, the online data sequence of the full current of the arrester leakage current and the online data sequence of the arrester leakage current resistive current data sequence.

[0044] S220. Establish an equivalent circuit simulation model of the lightning arrester under the operating voltage, and perform model training according to the simulation data obtained from the equivalent circuit simulation model o...

Embodiment 3

[0060] This embodiment is refined on the basis of the above-mentioned embodiments, Figure 4 It is a flow chart of a method for identifying the operating state of an arrester based on online monitoring data provided by Embodiment 3 of the present invention. Refer to Figure 4 , the method includes:

[0061] S310. Obtain the online monitoring data of the arrester, the online monitoring data at least include the online data sequence of the total distortion rate of the arrester leakage current, the online data sequence of the total harmonic distortion rate of the arrester voltage, the online data sequence of the full current of the arrester leakage current and the online data sequence of the arrester leakage current resistive current data sequence.

[0062] S320. Input the online data sequence of the total distortion rate of the arrester leakage current and the online data sequence of the total distortion rate of the arrester voltage harmonic in the online monitoring data into the...

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Abstract

The embodiment of the invention discloses a lightning arrester operation state identification method and device based on online monitoring data. The method comprises the following steps: acquiring the online monitoring data of a lightning arrester; inputting a lightning arrester leakage current total distortion rate online data sequence and a lightning arrester voltage harmonic total distortion rate online data sequence in the online monitoring data into the trained LSTM-RNN model to obtain an updated lightning arrester leakage current total distortion rate online data sequence for eliminating power grid harmonic waves; and inputting the updated lightning arrester leakage current total distortion rate online data sequence, the lightning arrester leakage current total current online data sequence and the lightning arrester leakage current resistive current online data sequence into the trained random forest model to obtain a state identification prediction result of the lightning arrester. According to the embodiment of the invention, the operation state of the lightning arrester is monitored in real time, hidden dangers are found in the early stage of degradation of the lightning arrester, a reference basis is provided for a power supply department to make a lightning arrester maintenance test plan, and the intelligent level of a power grid is improved.

Description

technical field [0001] The invention relates to a technology for monitoring the operating state of a lightning arrester in a power grid system, in particular to a method and a device for identifying the operating state of an arrester based on online monitoring data. Background technique [0002] Due to its simple structure, small size and strong flow capacity, zinc oxide arresters are widely used in the protection of lightning overvoltage and operating overvoltage in power systems, providing a reliable guarantee for the continuous and safe operation of power supply systems. [0003] In addition to being threatened by lightning overvoltage and operating overvoltage, zinc oxide arresters will also be affected by factors such as aging and moisture during operation, resulting in increased leakage current and heat generation in the arrester. In severe cases, thermal runaway may occur, seriously affecting The performance of zinc oxide arresters and the safety of power grid systems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06N3/04G06N3/08G06N3/00G01R31/00G01R31/52G01R23/16
CPCG06F30/27G06N3/08G06N3/006G01R31/00G01R31/52G01R23/16G06N3/045Y04S10/50
Inventor 方文田李旭宏杨永辉蔡伟贤陈晓彬李涛朱育钊方逸越
Owner JIEYANG POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD