一起“零序手合加速出口”保护动作的分析

Analysis of Once Action of Zero Sequence Line Protection Switch

详细描述了一起线路恢复送电过程中,"零序手合加速出口"保护动作的情况,通过对现场保护动作报告和故障录波分析,找出了保护动作和保护动作后开关B、C相又自动合上的原因,提出了加强刀闸触头的检修和加强保护断路器控制回路试验,以防止再发生类似的问题。

This paper analyzed the reason of action of zero sequence line protection switch during resuming the line＇s electricity transmission ability.After than,advanced the idea of enhancing the complete overhaul the state of the isolation switch＇s contact and the complete field test of control circuit of protective equipment regularly.consequently,prevents the recurrence of similar incident.