Influence of the Test Current on Dynamic Resistance Measurements of SF<sub>6</sub> Circuit Breakers

WU Yang; LAN Lei; YANG Fangnan; CHEN Gong; ZHOU Jiao; XU Bichuan; WEN Xishan

doi:10.13296/j.1001-1609.hva.2017.09.011

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Influence of the Test Current on Dynamic Resistance Measurements of SF₆ Circuit Breakers

更新时间：2025-04-26

- Influence of the Test Current on Dynamic Resistance Measurements of SF₆ Circuit Breakers
- High VoltageApparatus Vol. 53, Issue 9, Pages: 66-71+77(2017)
- 作者机构：
  
  1. 武汉大学电气工程学院
  2. 国网青海省电力公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.09.011
  CLC： TM561.3
- Published：2017
- 稿件说明：
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[1]吴杨,蓝磊,杨放南,陈功,周姣,徐碧川,文习山.测试电流对SF_6断路器动态电阻测量的影响研究[J].高压电器,2017,53(09):66-71+77.

WU Yang, LAN Lei, YANG Fangnan, et al. Influence of the Test Current on Dynamic Resistance Measurements of SF₆ Circuit Breakers[J]. High voltageapparatus, 2017, 53(9): 66-71+77.
[1]吴杨,蓝磊,杨放南,陈功,周姣,徐碧川,文习山.测试电流对SF_6断路器动态电阻测量的影响研究[J].高压电器,2017,53(09):66-71+77. DOI： 10.13296/j.1001-1609.hva.2017.09.011.

WU Yang, LAN Lei, YANG Fangnan, et al. Influence of the Test Current on Dynamic Resistance Measurements of SF₆ Circuit Breakers[J]. High voltageapparatus, 2017, 53(9): 66-71+77. DOI： 10.13296/j.1001-1609.hva.2017.09.011.

摘要

动态电阻测试可在不拆解SF6断路器灭弧室情况下获得其触头状态。为研究不同烧蚀程度SF6断路器动态电阻测试受测试电流的影响

文中对126 kV SF6断路器进行模拟烧蚀试验

在13种不同烧蚀程度下选用3种试验电流进行动态电阻测试。试验结果表明

任何烧蚀程度下

测试电流越大则弧触头测量电阻越小

弧触头行程与测试电流无明显联系

测试结果分散性随测试电流增大而减小

在触头烧蚀非常严重时

无论测试电流大小如何

测试结果分散性均很大。综合考虑测试电流对接触电阻的影响

为获得更真实的弧触头电阻并减小测试结果分散性

应尽量选择较大的动态电阻测试电流

在触头烧蚀十分严重时

必须进行大量测试

根据测试结果分布情况判断弧触头状态。

Abstract

The condition of SF

circuitbreaker contacts can be obtained through the dynamic contact resistance measurement without dismantling circuit breakers.In order to study the influence of the test current on the dynamic resistance measurement of the SF

circuit breaker with different erosion degrees

simulated erosion experiment was carried on 126 kV SF

circuit breaker

and the dynamic resistance test under 3 kind of currents also is carried on the circuit breaker of 13 kind of erosion degrees. The result shows

that the higher the test current is

the smaller the resistance of arcing contactwhen the circuit breaker is of any degree

of erosion

but there is always no obvious link between the arcing contact travel and the test current. In addition

the dispersion of the test results decreases with the increase of the test current. However

when the erosion of the circuit breaker is very serious

the dispersion of results will be great regardless of the value of the test current.Therefore

considering the influence of test current on contact resistance

in order to obtain actualarcing contact resistance and to reduce the dispersion of test resultsconsidering the influence of test current on contact resistance

the larger dynamic resistance test current should be chosen as much as possible

and the dynamic resistance test must be carried on many times when contact erosion is extremely serious

so that the state of arcing contact can be obtained according to the distribution of test results.

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Influence of the Test Current on Dynamic Resistance Measurements of SF6 Circuit Breakers

DOI：10.13296/j.1001-1609.hva.2017.09.011

摘要

Abstract

关键词

Keywords

references

Influence of the Test Current on Dynamic Resistance Measurements of SF₆ Circuit Breakers