一起500kV变压器套管介损值异常事件的分析

Analysis of Abnormal Dielectric Loss Value in 500kV Transformer High-voltage Bushing

本文介绍了一起500kV变压器高压套管介损值异常事件的现场测试和返厂检查、试验和解体过程。分析了该套管介损值异常的原因,验证了套管绝缘在线监测系统、高压介损测试技术的有效性,给出了现场进行变压器高压套管介损测试的参考结论。

The paper introduced the process of field testing of one abnormal dielectric loss value in 500kV transformer high-voltage bushing,and checking, testing and disintegration in factory.The reason of abnormal dielectric loss value were given, the effectiveness of bushing insulation online monitoring, h igh-voltage dielectric loss testing technology had been verificated.The conclusion of field testing of dielectric loss value in transformer high-voltage bushing was pushed in this article.