摘要
介绍了一起500kV线路保护因设计错误造成PT二次回路多点接地,导致过电压辅助保护误动的事故,分析其原因并对存在的问题进行处理,提出PT多点接地的查找方法。
Owing to design error, an accident of 500kV transmission line protection miss-tripping due to PT multi-grounding is introduced. The reason of the accident are analyzed, and the problems existed are treated. Methods for locating the grounding points are proposed.
出处
《广东输电与变电技术》
2010年第2期53-54,共2页
Guangdong Power Transmission Technology
关键词
PT二次多点接地
查找和处理方法
Multi-grounding of PT secondary
Location and treatment
