大型电机局部放电在线监测的方法研究

Research on Online Partial Discharge Monitoring Method of Large-scale Electrical Machine

大型电机在电力系统各个生产部门起着关键的作用。而局部放电是发生在电机定子绕组上的常见故障,会造成绝缘的劣化,最终导致绝缘的击穿和短路事故。对局部放电的监测方法进行了整体概述,具体介绍了几种常用的在线监测局部放电的方法:成对耦合器监测法、中线射频监测法、定子槽耦合器监测法、引出线上耦合器监测法,同时介绍了各种方法的传感器设置,噪声的抑制情况。

Large - scale electrical machine plays a key role in power system and each production department. Partial discharge is one of the common failures of stator winding, and it can lead to deterioration of the insulation, resulting in insulation break- down and short circuit. The methods of partial discharge monitoring are described, five commonly used methods in online partial discharge monitoring of electrical machine are introduced, at the same time the sensor establishment for each partial discharge monitoring method and the situation of the noise suppression are introduced too.