高压电器2017，Vol.53Issue(9)：66-71,77,7.DOI:10.13296/j.1001-1609.hva.2017.09.011
测试电流对SF6断路器动态电阻测量的影响研究
Influence of the Test Current on Dynamic Resistance Measurements of SF6 Circuit Breakers
吴杨 1蓝磊 1杨放南 2陈功 1周姣 1徐碧川 1文习山1
作者信息
- 1. 武汉大学电气工程学院,武汉430072
- 2. 国网青海省电力公司,西宁810008
- 折叠
摘要
Abstract
The condition of SF6 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 SF6 circuit breaker with different erosion degrees,simulated erosion experiment was carried on 126 kV SF6 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.关键词
动态电阻/测试电流/触头烧蚀/相关系数/标准差/分散性Key words
dynamic resistance/test current/contact erosion/correlation coefficient/standard deviation/dispersion引用本文复制引用
吴杨,蓝磊,杨放南,陈功,周姣,徐碧川,文习山..测试电流对SF6断路器动态电阻测量的影响研究[J].高压电器,2017,53(9):66-71,77,7.
