水轮发电机励磁回路接地故障分析与处理

Analysis and Treatment of Earth Faults of Hydro-generator Excitation Circuit

自并励水轮发电机励磁回路绝缘下降引发一点接地故障,影响机组的连续运行,严重时会发展到两点接地威胁设备安全。以华光潭梯级电站水轮发电机励磁回路发生的接地故障为例,着重分析了碳粉污染的原因,并提出相应的处理方法。

The deterioration of the insulation in the excitation circuit of the self-shunt excitation hydro-generator causes the one point earth fault and affects the continuous operation of the unit,and even leads to the double point earth fault threatening the safety of the equipment.Illustrated with the case of the earth fault of the hydro-generator excitation circuit in Huaguangtan cascaded hydro-power plants,this paper puts forward the solutions through the cause analysis of carbon powder pollution.