A neutral grounding mode is proposed in this paper through analyzing the principle on large hydro-generator with compensation resonant neutral grounding. Compared with high resistance grounding,this mode can limit the grounding fault current and better protect the stator and winding. Based on the multi-loop analysis model one 700 MW hydro-generator in Three Gorges Power Plant is simulated, and the resultant data show the method is feasible.%详细分析了发电机中性点经消弧线圈谐振补偿接地方式的应用原理,提出一种发电机中性点接地方式,并且与中性点经接地变压器高电阻接地方式进行比较.这种中性点接地方式可以更好地限制定子单相接地时的故障电流,从而保护了定子铁心和绕组.采用多回路分析方法对三峡左岸一种700 MW的大型发电机进行仿真计算,仿真结果表明此方法是可行的.
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