摘要
某220 kV变压器现场交接试验中,长时感应电压带局部放电测量试验三相局放量均超标,通过试验测量及原因分析,确定了放电位置,最终确认局放量超标原因是在安装三相高压套管时,套管末端均压罩未装紧固螺栓。经处理后,该主变通过了局部放电试验。
In Field handover test of a 220 kV transformer, inducted voltage test and partial discharge test three-phase board volume all exceed the standard. Through testing method and analysis, the discharge position is located. Real reason for exceeding standard vol- ume is that in the installation of three-phase high voltage bushing, equalizing cover is fixed without fastening bolt in sleeve end. After processing the main transfurmer passed partial discharge test.
出处
《东北电力技术》
2013年第8期34-35,共2页
Northeast Electric Power Technology
关键词
变压器
长时感应电压
局部放电
Transformer
Long induction voltage
Partial discharge
