一起母差保护误动事件分析  

Analysis of A Bus Differential Protection Misoperation Event

作　　者：朱国超 马海峰 崔国良 陈姣 王彦彪 ZHU Guochao;MA Haifeng;CUI Guoliang;CHEN Jiao;WANG Yanbiao

机构地区：[1]国网青海省电力公司超高压公司,青海西宁810000

出　　处：《青海电力》2024年第3期58-62,共5页Qinghai Electric Power

摘　　要：通过对某变电站110 kV MY线故障,线路两侧线路保护动作跳闸,同时站内110 kV双套母线保护因MY线CT变比错误动作跳闸,导致事故扩大;通过对该事件情况发生的原因分析研究,最终确定问题所在,通过对本次事件的分析诊断进一步掌握保护误动事件的分析方法,并对日后验收、运维注意事项提出相应建议。Through the fault of 110kV MY line in a substation,the trip of line protection action on both sides of the line,at the same time,the trip of 110 kV double busbar protection in the substation due to the wrong action of MY line CT ratio,resulting in the accident expansion;Through the analysis of the cause of the incident,the problem is finally determined,through the analysis and diagnosis of the incident to further grasp the analysis of Protection Maloperation event,and to the future acceptance,operation and maintenance matters for attention to put forward corresponding recommendations.

关 键 词：母线保护 CT变比 保护误动 原因分析 

分 类 号：TM773.4[电气工程—电力系统及自动化]