深溪沟水电站发电机组定子一点接地保护采用基波零序与三次谐波零序电压的原理,而三次谐波电压定值无固定规律可循,要使三次谐波电压定值整定合理,就必须对机组运行中的三次谐波情况进行统计分析,使三次谐波电压定值合乎实际情况。 Shenxigou hydropower station generator point grounding protection using the fundamental zero sequence and the third harmonic zero sequence voltage principle, and the third harmonic voltage setting no fixed law to follow, to make the third harmonic voltage setting is reasonable, on the It is necessary to make statistical analysis on the third harmonic in the operation of the unit so that the third harmonic voltage setting is in line with the actual situation.