发电机转子一点接地故障分析与排查——以二滩水电站为例

Troubleshooting of One Point Grounding Faults of Generator Rotor in Ertan Hydropower Station

以二滩水电站为例,介绍了大型水轮发电机组接地故障的类型及危害,对发电机转子一点接地故障进行了分析,提出了发电机组发生转子一点接地故障时的查找及处理方法,指出二滩电站发电机组转子一点接地属于动态不稳定接地,很难查明故障原因。

Taking Ertan hydropower station as an example , the patterns and consequences of grounding faults occurred in large-scale water turbine generator sets are discussed .The one point grounding fault of generator rotor is specifically analyzed .Searching and treatment measures for this kind of fault are proposed .It is found that the one point grounding faults of generator rotor occurred in Ertan hydropower station are dynamic unstable grounding , therefore the causes are difficult to identified .