弱电强磁条件下的纵联零序保护不正确动作事故分析

Fault Analysis of Incorrect Operation of Longitudinal Zero Sequence Protection

本文通过对一例220kV纵联零序保护误动作事故的详细解剖,分析同走廊架设的线路之间弱电强磁联系下的保护动作行为,并提出在该种情况下防止保护误动作的解决措施。

Through a detailed dissection of a 220 kV longitudinal zero-sequence protection elror action accident, this paper analyzes the protective action behavior under the weak electric and strong magnetic connection between the lines erected in the corridor, and puts forward a solution to prevent the protection error action in this case.