220kV开关拒动事故分析  

Accident Analysis of a 220kV Switch Failure

作　　者：刘洋 黄天啸 赵明 LIU Yang;HUANG Tianxiao;ZHAO Ming(State Grid Heilongjiang Electric Power Company Limited Maintenance Company,Haerbin 150006,China;State Grid Jibei Electric Power Company Power Research Institute,Beijing 100045,China)

机构地区：[1]国网黑龙江省电力有限公司检修公司,黑龙江哈尔滨150006 [2]国网冀北电力有限公司电力科学研究院,北京100045

出　　处：《电工技术》2019年第1期88-90,共3页Electric Engineering

摘　　要：针对一起220kV开关拒动事故,阐明事故的原因和处理过程。计算和仿真结果分析表明,对于两组线圈共用铁芯的跳闸机构,开关误动概率会增大,在线圈接线顺序错误时开关还将无法动作,建议更换为可靠性更强的分体独立式结构的线圈。To a 220kV switch failure accident,the cause of the accident and the process of handling were introduced.Calculation and simulation showed that,for the tripping mechanism of the two sets of trip coils,the incorrect wiring of the coil will cause the switch to fail.At the same time,the tripping mechanism also raises the probability of the malfunction.It was recommended that the coil be replaced by a separate independent coil which has stronger reliability.

关 键 词：开关拒动 断路器 跳闸线圈 二次回路 

分 类 号：TM07[电气工程—电工理论与新技术]