一起550 kV SF_6电流互感器故障分析及处理

Fault Analysis and Treatment of 550 kV SF_6 Current Transformer

以一起550 kV线路SF6气体绝缘电流互感器故障为例,分析发现电流互感器一次回路结构存在问题,导致局部电流互感器过热,采取了减少一次导流回路的接触过渡面、增加导流铜带的改进措施。投运后,定期对电流互感器进行了巡检,运行正常。

The fault of 550 kV current transformer was analyzed,and it found out that there was problem at the structure of primary circuit,which led to partial overheating of the current transformer.As solutions,contact interface is reduced and copper strips are added.After the new measures were carried out,periodical inspections are done on the current transformer,and the results show that it operates normally.