铁路中性点不接地电力系统铁磁谐振的产生原因及特点

Cause and Feature of Electric System Ferromagnetic Resonance of Neutral-point Earth Free in Railway

通过对铁路中性点不接地电力系统运行方式的分析 ,指出其产生铁磁谐振的原因及产生铁磁谐振后引发弧光过电压使电缆“放炮”,引发谐振过电压或过电流使电压互感器烧毁 ,引发间歇性过电压使避雷器爆炸等特点。

By analgsis to the electric power system running of neutral-point earth free in railway,point out the cause of its generating ferromagnetic resonance and after generating ferromagnetic resonance,trigger arc overvoltage to make electric cables to be broken,resonance ovevvoltage or overcurrent to make voltage transformer to be burnt and trigger intermittent overroltage to make arrester explode.