水轮发电机中性点经消弧线圈接地暂态过电压的研究

文章研究了发电机中性点经消弧线圈接地系统考虑燃熄弧条件、发电机不对称度、调谐度、品质因数Ｑ值的影响等因素时的单相间歇电弧接地过电压，研究结果表明，前两者对暂这电压的影响较大。对发电机组甩负荷和频率变化时发生单相间歇电弧接地的暂态过电压进行了计算，计算表明动态电势是主要的影响因素，并提出了限制措施。

TRANSIENT OVERVOLTAGE OF HYDROGENERATOR WITH RESONANT GROUNDING NEUTRAL

The single phase intermittent arc grounding overvoltage of generator neutral with resonant grounding is studied while the influences of several factors are considered, such as the condition of arc burning and clear, unsymmetry extent of generator, tuning degree and the quality factor Q. The calculating result indicates the first two factors have larger effects on this transient overvoltage. The transient overvoltage, caused by single phase intermittence arc grounding while the load of generator is shed or the frequency varies, is calculated. Analysis results indicate that the dynamic potential is the major factor effecting the transient overvoltage, and some corresponding countermeasures are suggested.