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
张勇,柯梦晗,刘伟
ZHANG Yong,KE Menghan,LIU Wei
摘要(Abstract):
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 k V double-circuit lines expansion of 500 k V substation, there was disconnection of a 220 k V TA for bus differential protection due to secondary wiring fault. According to monitoring background reports, protection principle drawings and fault site, this paper introduces the checking process and cause analysis of bus differential protection TA disconnection; besides, it proposes treatment methods and improvement.
关键词(KeyWords):
母差保护;TA断线;异常分析;故障处理
bus differential protection;TA disconnection;abnormality analysis;fault treatment
基金项目(Foundation):
作者(Author):
张勇,柯梦晗,刘伟
ZHANG Yong,KE Menghan,LIU Wei
DOI: 10.19585/j.zjdl.201705005
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