以三峡水轮发电机的参数为仿真计算实例 ,对基波和三次谐波电压原理的水轮发电机各种定子接地保护方案进行了灵敏度的对比分析 ,在此基础上提出基于故障分量的定子接地保护方案。研究表明 ,只要取出保证计算精度的故障分量 ,该方案将能满足三峡电站发电机定子接地保护的灵敏度要求。 Taking the parameters of the Three Gorges hydroelectric generator as a simulation example, the sensitivity analysis of various stator ground protection schemes for hydroelectric generators with fundamental and third harmonic voltage principles is carried out. Based on this, the stator based on the fault component Ground protection program. The research shows that this scheme will meet the sensitivity requirements of stator grounding protection of Three Gorges Power Station as long as the fault component of guarantee calculation accuracy is taken out.