一起高压套管末屏接触不良引起的变压器局放超标事故的分析

Analysis of Partial Dischage of Exceeding Standard Accident Caused by Poor Contact of High Voltage Bushing End Shield

对某发电厂一台500kV油浸式变压器大修后局放试验出现局部放电量超标的事故进行介绍,通过对试验过程和变压器绝缘油油色谱结果进行分析,找出了事故原因。

The accident is introduced that the partial discharge of a 500kV transformer.By analyzing the test process and the oil chromatographic results of the transformer insula-tion oil,the cause of the accident is found out.