发电机绝缘受潮分析与处理

Analysis and Treatment of Generator Insulation Moisture

空冷式发电机在停运状态下绝缘容易受潮,主要表现在泄漏电流显著增加、绝缘电阻显著降低。按照规定,绝缘电阻低到一定数值,是不允许运行的,必须进行干燥处理。本文结合发电机的结构特点对绝缘容易受潮的原因进行了分析与判断。并介绍了短路法处理发电机绝缘受潮的方法,该方法操作简便、节省时间、效果良好。

The insulation of air-cooled generator gets damped easily when the generator stands still. Damped insulation is charatefized by significant increase in leakage current and decrease in insulation resistance. If the insulation resistance reduces to a certain parameter, it is not allowed to work, and must be dried. This paper prensents analysis and judgment for the reason of insulation moisture based on the structural characteristics of generator insulation. It also introduces how to solve the problem of the insulation moisture with short-circuit method. This method is simple, timesaving and the results are very good.