摘要
直流接地会造成继电保护的拒动或误动,在复杂情况下如高阻接地、环路接地、平衡接地及交直串接地,并随温湿度变化,给直流接地准确定位带来较大困难。作者归纳总结现行的直流装置的各种原理方法,分析其优缺点,提出了适合现场的故障排查方案,即以便携式设备实现现场的精确定位为主要解决方式的电力系统直流接地故障的排查方案。
DC grounding is possible to cause the failure of relay. Accurate localization of DC grouding is hard to be achived for some complicated instances such as high-resistance grouding, closed loop grouding, equipoise grouding, DC-AC grouding and change of temperature and humidity. The principles of every kinds of examine device is presented, Advantages and disadvan-tages of them are presented. A accurate localization mode adapted to actuality, which is take portable device as a main power system DC grouding inspection implement is presented.
出处
《电气应用》
北大核心
2008年第5期56-58,共3页
Electrotechnical Application
关键词
直流接地
选线
定位
DC grouding select fanlt line localization
