220kV电流互感器爆炸故障分析

The Analysis of 220kV CT Explosion Fault

本文介绍了一起220kV电流互感器故障分析过程,首先对故障发生过程和现场检查情况进行了描述,通过解体研究和电气试验,针对保护方面问题进行深入分析,指出电流互感器一次导体加工工艺不良和雷电过电压两个因素导致电流互感器故障,电流互感器一次接线极性错误造成故障范围扩大。

A fault analysis procedure of 220 kV current transformer is introduced.The paper describes the process of fault and spot inspection at first.Then the deep analysis of protection problem is doing by disassembly and electrical test.The bad processing technic of current transformer primary conductor and lighting overvoltage result in this fault.wrong primary connection of current transformer polarity leading to additional fault coverage.