摘要
绝缘子表面泄漏电流对污闪过程起着十分重要的作用。泄漏电流量与污秽层的性质、污秽量、湿润方式和外施电压等因素有关。随着湿度和电压的增加,放电加强,绝缘子串泄漏电流的高频成份幅值越来越大,当闪络时达到最大,而低频段基本保持不变。通过分析这个现象可以判断绝缘子污秽程度。
The current leakage on the insulators＇ surface plays an important role in the flashover process. The current leakage level is depended on the nature and extnt of contamination, kind of wetness, supplied voltage, and other factors. The discharge is enhancing with the increase of humidity and voltage. In the same time, the amplitude of high frequency components of the current leakage is growing. It reaches its maximum at flashover, but the amplitude of low frequency band basically keeps stable. Through analyzing this phenomenon the extent of insulator contamination may be detected.
出处
《煤矿机电》
2010年第2期38-40,43,共4页
Colliery Mechanical & Electrical Technology
关键词
绝缘子
事故分析
漏电
闪络
insulator
accident analysis
current leakage
flashover
