6kV母线过电压的原因分析及处理

Cause Analysis and Treatment of 6kV Bus Overvoltage

在中性点不接地系统中,铁磁谐振过电压是一种很常见的内部过电压,会对供电的稳定性与可靠性造成严重影响。通过一起电厂6kV母线铁磁谐振过电压事件,分析了电力系统铁磁谐振过电压的产生原理,介绍了几种铁磁谐振过电压的现象,列举了产生谐振的几个条件以及几种消除铁磁谐振过电压的措施。

Ferromagnetic resonance overvoltage is a very common Internal Overvoltage in ungrounded neutral system,which will seriously affect the stability and reliability of power supply.Through a 6kV bus ferroresonance overvoltage event in a power plant,the generation principle of ferroresonance overvoltage in power system is analyzed,several phenomena of ferroresonance overvoltage are introduced,several conditions for generating resonance and several measures for eliminating ferroresonance overvoltage are listed.