110kV变电站的铁磁谐振分析与抑制

Ferromagnetic Resonance Analysis and Suppression of 110kV Substation

根据变电站的运行情况,利用PSCAD软件搭建了相关模型并计算了所需模块的参数值。由经验可知在单相接地故障下产生铁磁谐振过电压,对10kV线路对比了只有变压器和加入互感器的情况,同时对35kV系统单相接地故障下铁磁谐振的情况进行研究,最后对抑制铁磁谐振的三种方法进行仿真分析。

According to the operating conditions of the substation,the relevant model is built using PSCAD software and the parameter values of the required modules are calculated.It can be known from experience that a ferromagnetic resonance overvoltage occurs under a single-phase ground fault.The 10kV line is compared with the case where only the transformer is added and the transformer is added.At the same time,the situation of ferromagnetic resonance under the single-phase grounding fault of 35kV system is researched.Finally,three methods of suppressing the ferromagnetic resonance are simulated and analyzed.