一起750kV接地刀闸故障分析与处理  

Fault Analysis and Treatment of 750kV Grounding Brake

作　　者：何磊 HE Lei

机构地区：[1]国网宁夏电力有限公司检修公司,宁夏银川750011

出　　处：《青海电力》2020年第3期45-49,共5页Qinghai Electric Power

摘　　要：介绍某750 kV变电站一起由接地刀闸短路故障造成的750 kV母线跳闸事故,通过对750 kV接地刀闸发生故障瞬间保护动作信息、故障波形录波分析,现场实际检查情况,以及仿真模拟试验综合分析,最终确定为750 kV接地刀闸长时间运行导致螺栓松动脱落,与隔离开关失去机械闭锁,造成运行750 kV母线接地故障跳闸。依据此案例,为接地刀闸的出厂验收、安装验收、日常维护、检修机制等提供运检经验。The article introduces a 750 kV substation caused by earthing short circuit breaker failure with 750 kV bus trip accident,based on the 750 kV grounding failure moment breaker protection action information,fault waveform recorded wave analysis,the actual inspection situation,comprehensive analysis and simulation test,finally confirmed for 750 kV breaker grounded the long running result in bolt loose fall off,lose machinery atresia and isolating switch,causing 750 kV bus bar grounding fault tripping operation.Based on this case,it provides transportation and inspection experience for the factory acceptance,installation acceptance,daily maintenance,overhaul mechanism,etc.

关 键 词：接地刀闸 短路故障 螺栓松动 机械闭锁 

分 类 号：TM564.1[电气工程—电器]