某水电站500 kV PT铁磁谐振现象分析与处理

Analysis and Treatment of 500 kV PT Ferromagnetic Resonance Phenomenon in a Hydropower Station

本文结合某大型水电站倒闸操作,停电过程中出现的主变高压侧T区谐振实际案例进行分析,并对出现该铁磁谐振现象的原理及预控措施做出总结,为保障电站及电网的稳定运行积累经验,方便电力生产一线的运行检修维护和事故应急处置,为高压系统PT铁磁谐振故障处理提供一定参考。

Combined with the switching operation of a large hydropower station,this paper analyzes the actual case of the resonance of the T zone of the high voltage side of main transformer during the power failure operation,and summarizes the principle and pre-control measures of the ferromagnetic resonance phenomenon,so as to accumulate experience in ensuring the stable operation of the power station and power grid,to facilitate the operation,maintenance and emergency handling of accidents in the first line of power production,and to provide reference for the treatment of the PT ferromagnetic resonance fault of the high-voltage system.