中性点经消弧线圈接地系统故障点定位方法研究

Research all Neutral Point Via Arc Suppression Coil Grounded System Fault Point Location Method

针对中性点经消弧线圈系统发生单相接地故障时,现有选线及定位方法存在的问题,提出"双频电流信号注入法"。通过微处理器产生不同频率的信号,对这两个不同的频率电流信号进行数据采集、定位,然后将他们的结果综合比较,通过平均值来确定故障线路,快速解决故障线路的选择和定位的问题。仿真结果验证了改进方法的有效性及准确性。

Single-phase ground fault occurs by arc suppression coil system for the neutral point,the problems of the existing line selection and location method proposed dual-frequency current signal injection method. By microprocessor produce different frequency signals,the frequency of the two different current signal for data acquisition,location,and then compare their results integrated,through average value to determine the fault line,to quickly solve the problem of fault line selection and location. Simulation results verify the effectiveness of the improved method and accuracy.