一起110 kV油浸式电流互感器故障分析

Fault Analysis of a 110 kV Oil-immersed Current Transformer

针对一起110 kV油浸式电流互感器爆炸事故,通过对事故电流互感器进行解体检查、分析保护装置的动作情况,明确了故障原因是电流互感器末屏接地断开,并提出开展油浸式电流互感器在线监测等防范措施,以防止油浸式电流互感器发生同类缺陷。

In allusion to an explosion accident of a 110 kV oil-immersed current transformer,it is determined that the fault cause is grounding disconnection of the current transformer end screen through the disassembly inspection of the faulty current transformer and the analysis of the operation of relay protection device.The preventive measures such as carrying out online monitoring of the oil-immersed current transformer are put forward to prevent the similar defect of the oil-immersed current transformer.