110kV母差保护动作误跳的事故案例分析  

Analysis of a Malfunction of 110kV Bus Differential Protection

作　　者：薛钟兵[1] XUE Zhongbing(State Grid Yangzhou Power Supply Company,Yangzhou 225002,China)

机构地区：[1]国网扬州供电公司,江苏扬州225002

出　　处：《电工技术》2018年第21期104-105,共2页Electric Engineering

摘　　要：介绍了某变电站发生的一起110kV母差保护动作误跳开关的事故案例,通过现场检查情况分析出误跳的原因为刀闸辅助接点接触不良,并提出了相应的预控措施,总结了刀闸辅助接点位置不正确对母差保护的影响。A case of malfunction of 110kV bus differential protection occurred in a substation was introduced.After on-site inspection,the reason of contact loss of auxiliary contact of knife switch was analyzed and corresponding control measures were proposed.The influence of incorrect location of auxiliary contact of knife switch on bus differential protection was analyzed and summarized.

关 键 词：母差保护 刀闸辅助接点 误跳 

分 类 号：TM773[电气工程—电力系统及自动化]