220 kV母差保护电流互感器断线异常原因分析与处理  

Cause Analysis and Countermeasures of Disconnection of a 220 kV Current Transformer for Differential Bus Protection

作　　者：张勇[1] 柯梦晗 刘伟[1] ZHANG Yang KE Menghan LIU Wei(State Grid Zhejiang Maintenance Branch Company,Hangzhou 311232, China)

机构地区：[1]国网浙江省电力公司检修分公司,杭州311232

出　　处：《浙江电力》2017年第5期16-19,33,共5页Zhejiang Electric Power

摘　　要：某500 k V变电站220 k V双回线线路扩建时,因二次接线错误引起了220 k V母差保护TA断线异常。根据现场监控后台报告、保护原理图纸和故障现场情况,介绍了220 k V母差保护报TA断线的检查过程和原因分析,并提出了针对性的处理办法和改进措施。In 220 kV double-circuit lines expansion of 500 kV substation,there was disconnection of a 220 kV TA for bus differential protection due to secondary wiring fault. According to monitoring background re-ports, protection principle drawings and fault site,this paper introduces the checking process and cause anal-ysis of bus differential protection TA disconnection; besides,it proposes treatment methods and improvement.

关 键 词：母差保护 TA断线 异常分析 故障处理 

分 类 号：TM63[电气工程—电力系统及自动化] TM773