直流输电线路故障点的定位方法

为降低因直流输电线路上的故障所造成的停电损失,就必须研究直流输电线路上故障点的快速定位方法。作者提出了一种确定直流输电线路上故障点的快速定位方法,即首先在线路首端、末端和线路上某结点安装3个测量单元,当线路上发生短路故障时,各测点分别同时测量电压行波,各测点将一段时间内的同时采样数据分别传送到监控单元,在监控单元通过比较各相邻采样点间的电压行波波形特征来计算故障行波在线路上的传播延时时间,进而计算故障点。理论分析和仿真实验结果表明,该方法计算结果准确,同时可以降低采样频率,避免了漏检问题,为快速确定直流线路上的故障点提供了一种新方法。

The Location Method of Fault on Direct Current Transmission Line

In order to reduce the economic losses,it is very important to research the location method of fault on direct current transmission line.A new method is proposed in this paper to locate the fault on direct current transmission line.At first three measuring units are installed at the beginning,end and middle of the line.The data collected simultaneously during one period time in these three units are transferred to a central monitor unit.The time delay between these measuring units is calculated by comparing...