以三峡水轮发电机为例，阐述了大型水轮发电机中性点经消弧线圈接地的必要性。
Taking the hydro-generator for the Three Gorges power plant as an example, this paper expounds it is very necessary for large_capacity hydro-generator to adopt arc-extinguishing coil grounding.
发电机中性点运行方式有中性点不接地、小阻抗接地、高阻抗接地、消弧线圈接地。
Generator neutral ground methods include non-ground, low impedance ground, high impedance ground and arc-suppression coil ground.
目前对大容量发电机中性点接地方式有两种不同观点，即中性点经配电变高阻接地和经消弧线圈谐振接地。
Two different viewpoints about neutral ground way of large-capacity generators at present, neutral grounding by distribution transformer or resonant.
本系列发电机为三相带有中性点的星形接法，线电压为400v，相电压为230v。
This generator employs three phrase star connections with neutral point, the wire voltage is 400v and the phrase voltage is 230v.
对于中性点不直接接地的发电机，由于三相对地电容值存在差异，中性点与地之间存在一定电压。
Due to three-phase capacitance to ground, certain voltage exists between the neutral and the ground for a generator with ungrounded neutral.
禁止任一变压器中性点或发电机始点处直接接地。
No direct connection from either transformer neutral points or generator star points to earth is permitted.
对于多分支的水轮发电机，可以采用多种中性点引出方式，相应主保护的构成方式和组合方案数目巨大，很难通过穷举法获得最优的配置方案。
Since a multi-branch hydro-generator could adopt many modes of neutral-point lead, its main protection configuration has a large number of constitute manners and compound schemes.
对于多分支的水轮发电机，可以采用多种中性点引出方式，相应主保护的构成方式和组合方案数目巨大，很难通过穷举法获得最优的配置方案。
Since a multi-branch hydro-generator could adopt many modes of neutral-point lead, its main protection configuration has a large number of constitute manners and compound schemes.
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