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在介绍核电站发电机中性点接地方式和主要设备参数的基础上,通过接地故障电流和机组的暂态过电压的计算分析,将发电机中性点接地变压器二次侧接地电阻由1.6Ω变更为2.6Ω,从而保证了核电机组安全稳定运行。
Based on the introduction of the neutral point grounding method and the main equipment parameters of the nuclear power plant generator, the ground fault current and the transient overvoltage of the generating unit are calculated and analyzed. The secondary grounding resistance of the generator neutral grounding transformer is changed from 1.6Ω 2.6Ω, thus ensuring the safe and stable operation of nuclear power units.