几例发电机定子一点接地故障的分析及处理

Fault Processing and Analysis of Stator Single-phase Grounding Faults

介绍了几起非发电机定子故障引起的定子接地保护动作故障的分析及处理过程。在较短时间内完成故障抢修可以减少发电量损失,其关键在于快速定位故障点。从实际故障处理过程中可以看出,定子一点接地保护动作后,首先要确认故障部位是发电机本体还是其它设备。对于发电机出口设备引起的非金属性接地故障,通过交流耐压方式定位故障点,快速直接。该故障部位及处理过程可为电力生产单位的运行维护提供参考。

The analysis and treatment of several stator ground protection action faults caused by non generator stator faults were introduced.The key to reduce the loss of power generation is to locate the fault point quickly.It can be seen from the actual fault treatment process that after the stator one point grounding protection acts,it is necessary to confirm whether the fault location is the generator body or other equipment.For the non-metallic grounding fault caused by generator outlet equipment,the fault point is located by AC voltage withstand method,which is fast and direct.The fault location and treatment process can provide reference for the operation and maintenance of power production units.