静止励磁轴电压滤波回路对发电机转子接地保护装置的影响

Effects of static excitation voltage filter circuit of generator rotor grounding protection devices

阐述了发电机转子注入方波电源式接地保护、乒乓式接地保护及励磁轴电压滤波器的工作原理,指出注入方波电源式接地保护和乒乓式接地保护受励磁轴电压滤波器参数影响较大的特点。结合工程实例,分析了励磁轴电压滤波器对注入方波电源式接地保护、乒乓式接地保护的影响。结果显示,励磁轴电压滤波器会导致注入方波电源式接地保护和乒乓式接地保护的接地测量值不能正确反映发电机转子绕组的接地阻值,提出了参数调整方法,使机组综合性能达到最优。

The theory of the injection square wave ground protection,PingP ang ground protection,and excitation voltage filter for generator rotor were analyzed. The injection wave ground protection and PingP ang ground protection were easily affected by the parameters of the excitation voltages. Based on the engineering projections,the effects of the.