一起开关柜设备故障引发的多套保护动作分析

Analysis of Multiple Sets of Protective Actions Caused by Failure of Switch Gear Equipment

某110 kV变电站发生一起#1主变低压侧开关故障引起的#1和#2主变保护动作跳闸,文章对故障前后相关设备、保护动作波形进行了详细调查分析,找到了故障发生的原因及发展过程,理清了保护动作的时序,表明本次继电保护的合理性,为继电保护人员提供了一种开关柜故障的防范方法。

A protective action tripping of#1 and#2 main transformer caused by switch failure of low voltage side of#1 main transformer happened in a 110 kV substation.This paper analyzes the relevant equipment and protective action waveform before and after the failure and focuses on elucidating the rationality of the relay protection from the aspects of failure causes and protective actions,which provides a precaution method for relay protection personnel to deal with switch gear failure.