发电机定子绕组绝缘介质暂态电场分布的场路分析法

Field-circuit analysis method of transient electric field in stator winding insulation of generators

针对在厂站操作过电压冲击下的大型发电机,建立一种暂态过电压的场路分析方法,研究大型发电机的暂态过电压场路分析模型。通过仿真研究表明暂态过电压场路分析模型能够对定子绕组绝缘介质中暂态电场的分布状态进行分析,搜索发电机内部可能突发绝缘事故的区域,预测发电机内部可能发生绝缘事故的故障点,提高大型发电机绝缘安全在线诊断的准确度。

For the large generator stricken by the operational over-voltage in power stations,a field -circuit analysis method of transient over-voltage is presented to study the transient over-voltage field -circuit model of large generator. The simulative research shows that,the transient field- circuit analysis model can analyze the transient field distribution in the stator winding insulator,predict possible insulation fault points and detect possible insulation fault domains in generator,which increases the online diagnosis correctness of large generator insulation safety.