10 kV电缆网小电流接地系统故障定位方法研究

Research of fault location in 10 kV cable network small current grounding system

针对电缆配电网不易改动、检修费用大及故障查找耗时长等问题,提出了一种简单的基于零序电流暂态分量的10 k V电缆网小电流系统故障定位方法。通过理论分析得出,故障线路上故障电流与非故障线路上的高频暂态零序电流为非对称信号。利用MATLAB软件,仿真验证了所提故障定位方法的有效性。

It is not easy to change the cable distribution network,and maintenance costs are high and troubleshooting time is long. So a simple fault location method of 10 k V cable network small current system based on zero sequence current transient components is proposed. Through theoretical analysis,it is concluded that the fault current on the fault line and the high frequency transient zero sequence current on the non-fault line are asymmetric signals. The simulation using MATLAB software verifies that the fault location method is effective.