一起直流接地引起的刀闸误合闸事故分析  

Analysis on An Accident of Switch Closing Caused by DC Grounding

作　　者：张琼 Zhang Qiong

机构地区：[1]珠海金湾发电有限公司,广东珠海519000

出　　处：《电力系统装备》2021年第14期108-109,共2页Electric Power System Equipment

摘　　要：某厂站在操作500 kV开关合环时,直流系统发出直流接地告警,于是停止开关刀闸操作。但由于刀闸控制回路抗干扰能力较弱,导致了一起刀闸误合事件,虽无造成重大电力系统事故,但行为影响恶劣,需从根源上分析并解决问题,防止发生同类型事件。When a 500 kV switch is closed,the DC system gives a DC grounding alarm,and then stops the operation of the switch.However,the low anti-interference ability of the switch control circuit leads to a wrong closing event of the switch.Although it does not cause a major power system accident,its behavior has a bad impact.It is necessary to analyze and solve the problem from the root to prevent the occurrence of the same type of event.

关 键 词：直流接地 刀闸误合 抗干扰 

分 类 号：TM41[电气工程—电器]