直流配电线路多端行波故障定位算法

Multi-terminal Traveling Wave Fault Location Algorithm for DC Distribution Lines

快速、准确地确定故障点位置有利于直流配电系统的安全可靠运行。针对直流配电线路,利用各测量点记录的故障初始行波到达时刻,提出了一种基于各路径计算出的可能故障发生时刻,比较其大小并校核的定位算法。利用Floyd算法搜索各节点间的最短路径距离矩阵,结合测量点记录的故障初始行波到达时刻,使用各路径计算可能故障发生时间矩阵。对时间矩阵中的元素分组比较,确定故障位置并校核。PSCAD/EMTDC仿真验证了算法的有效性。

Quick and accurate determination of the fault location is conducive to the safe and reliable operation of the DC distribution system.For the DC distribution lines,using the time of fault initial traveling wave recorded by each measurement point,a location algorithm was proposed based on the possible fault occurrence time calculated by each path and comparing its size.The Floyd algorithm was used to search the shortest path distance matrix among each node.Combined with the time of fault initial traveling wave recorded by measurement points,the probable fault occurrence time matrix was calculated based on each path.Grouping and comparing elements in the time matrix,the location of the fault was found and checked.The PSCAD/EMTDC simulation verified the effectiveness of the algorithm.