配电线路单相接地故障定位的应用研究

Research on the Application of Single-phase Ground FaultLocation in Distribution Network

有关调查显示,配电线故障引发停电事故在总体停电中占比约90%。同时配电网故障中比较容易出现的就是单相接地故障。配电线路运行期间,一旦发生单相接地,对电网的运行安全及供电可靠性都将产生严重影响,尤其是在系统中性点的不同接地方式下,单相接地故障甚至会扩大为相间短路故障。所以,分析配网线路单相接地故障定位技术作用巨大。

According to the investigation,the proportion of power failure caused by distribution line fault in the total power failure is about 90%.At the same time,the single-phase ground fault is easy to appear in the whole distribution network fault.During the operation of distribution lines,once single-phase grounding occurs,it will have a serious impact on the operation safety and power supply reliability of the power grid,especially in different grounding modes of the system neutral point,single-phase grounding fault will even expand to phase to phase short circuit fault.Therefore,active research and analysis of single-phase to ground fault location technology plays a huge role.