一种双星形并联电容器组单相故障定位方法

A Single Phase Fault Location Method in Double Star Shunt Capacitor Bank

本文针对双星形并联电容器组故障定位存在的问题,提出了一种基于中性点不平衡电流保护的双星形并联电容器组单相故障定位方法,该方法通过分析中性点不平衡电流与故障相电流的相位与幅值关系,快速定位和判断故障电容器的相别、故障分支以及故障电容器单元个数,可解决此类并联电容器组单相故障时故障点不直观、检修效率低的问题,并通过PSCAD仿真验证了此方法的正确性。

In view of the problem of fault location in double star shunt capacitor bank,a kind of single phase fault location method based on neutral unbalance current in double star shunt capacitor bank is propsoed in this paper.The method can,by analyzing the relation between phaseand amplitude of unbalance current and fault current of the neutral point,quickly and intuitively locate the phase of the faulty capacitor,fault branch and number of faulty capacitor units,can solve such problem as no intuitive and low efficiency of the fault point of such shunt capacitor bank in the single phase fault and the the correctness of the method is varified by the PSCAD simulation.