一起倒闸操作中母线电压异常现象分析

Analysis of abnormal phenomenon in operation generator voltage

铁磁谐振是电力系统中运行人员在倒闸操作中经常可能遇到的一种现象。针对某变电站近期发生的一起倒闸操作中出现的谐振过电压现象进行研究,通过对试验所得的数据和设备参数的计算,列出了等值电路,分析了过电压产生的机理,找出了谐振发生的真正原因是断路器的参数和电压互感器的参数匹配不当,从一次设备选型、刀闸操作顺序、电压互感器二次防范措施等方面提出了相应的解决对策。

The ferromagnetic resonance is a kind of phenomenon that frequently occurs in the floodgate operation. This paper researches above phenomenon occurred recently in a power transformer station, which has calculated data and equipment parameter obtained from experiment, listed the equivalent circuit, analyzes the mechanism which the over voltage will produce, discovers the true reason which the resonance occurred is the improper match of circuit breaker parameter and the voltage transformer parameter, and proposes the corresponding solution in following aspects such as equipment shaping, operation sequence, two-times preventive method and so on.