发电机励磁回路一点接地故障分析

Research on One Point Grounding Fault of Generator Excitation Circuit

本文研究了发电机励磁回路不同部位一点接地时转子正负对地电位的大小及波形,并给出了通过转子正负对地电位的大小及波形确定接地点的方法。同时,采用研究得出的方法分析了一起发电机转子接地故障,该发电机发生故障时的转子正负对地电位与文中分析的完全一致。文章给出的分析方法对于发电机励磁回路一点接地的查找及故障定位具有重要的参考价值。

In this paper, the magnitude and the waveform of the positive and negative voltage to ground voltage in different parts of the generator excitation circuit are studied, and the method of determining the location of the grounding voltage by the rotor to ground voltage is presented. At the same time, the research method is used to analyze the rotor grounding fault of generator, and the positive and negative of the rotor of the generator is in complete agreement with the analysis in the paper. The analysis method presented in this paper has important reference value for finding fault location and fault location in the field of generator excitation circuit.