Study on the On-line Monitoring Method of Metal Oxide Surge Arrester

ZHANG Zhen-hong1; ZANG Dian-hong2

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Study on the On-line Monitoring Method of Metal Oxide Surge Arrester

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- Study on the On-line Monitoring Method of Metal Oxide Surge Arrester
- High VoltageApparatus Vol. 45, Issue 5, Pages: 126-129(2009)
- 作者机构：
  
  1. 山东科技大学
  2. 中国石油大学(华东)信息与控制工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM862
- Published：2009
- 稿件说明：
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[1]张振洪,臧殿红.氧化锌避雷器在线监测方法的研究[J].高压电器,2009,45(05):126-129.

ZHANG Zhen-hong1, ZANG Dian-hong2. Study on the On-line Monitoring Method of Metal Oxide Surge Arrester[J]. High voltageapparatus, 2009, 45(5): 126-129.
[1]张振洪,臧殿红.氧化锌避雷器在线监测方法的研究[J].高压电器,2009,45(05):126-129. DOI：

ZHANG Zhen-hong1, ZANG Dian-hong2. Study on the On-line Monitoring Method of Metal Oxide Surge Arrester[J]. High voltageapparatus, 2009, 45(5): 126-129. DOI：

摘要

基波电压产生的基波阻性电流ir和三次阻性电流i3r可以反应MOA的运行状况。改进的容性电流补偿法可有效去除全电流中的容性电流

但全电流中仍存在谐波电压产生的阻性电流

影响了ir和i3r的提取精度

特别是i3r的误差较大。为解决此问题

在改进补偿法的基础上

提出了改进容性电流补偿法的修正方法

借助于一等效的线性电阻补偿了部分谐波电压产生的阻性电流

从而减小了谐波电压引起的误差

提高了i3r的提取精度。仿真分析表明

修正后i3r的误差减小了一半

验证了此修正方法的有效性

也提高了根据ir和i3r判断MOA故障方法的准确性。

Abstract

The basic harmonic resistive current ir and the third resistive current i3r generated by the basic voltage can reflect the MOA’s operation state.The capacitive current in the full current can be effectively removed through the improved capacitive current compensation method

but the resistive current generated by the harmonic voltage still exists in the full current.So the extraction accuracy of ir and i3r is influenced

especially for the larger error of i3r.In order to resolve this problem

the modified method of the improved capacitive current compensation method is proposed in this paper.The resistive current generated by the harmonic voltage is partially compensated by the use of one equivalent linear resistor

which can reduce the error generated by the harmonic voltage and improve the extraction accuracy of i3r.The simulation analysis result shows that the error of i3r is reduced by half through the modified method and the effectiveness of the proposal algorithm is verified.Therefore

the accuracy of MOA fault diagnosis based on ir and i3r is improved.

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