中文摘要：

输电网中环路的存在会影响故障初始行波到达时间与行波传输路径的匹配,影响故障点位置的计算。为此,提出了一种自适应网络结构的故障行波定位方法。对于故障线路不包含于环路的情况,利用Floyd算法搜索故障点到网络中各节点的最短路径;对于故障线路包含于环路的情况,确定环路中初始行波到达时间最大的节点为解环点,并提出了剔除无效路径的时间判据,将复杂故障网络简化为辐射形网络。在辐射形网络中,运用基于整个电网的故障行波定位算法,实现全网综合定位。仿真结果表明,该方法实现简单,适用于任何结构的电网,能够有效弥补现有行波网络定位算法的缺陷和不足。

英文摘要：

The existing of loop in the transmission network may effect the matching of initial traveling wave arrival time and its transmission path,which causes an error for fault location.That is why a traveling wave fault location method for self-adapt network structure is proposed.Floyd algorithm is applied to search the shortest path from the fault point to all the nodes in the network when the fault line is without a loop.As for the fault line with some loops,the node,which records the maximal traveling wave arrival time, is suggested that directly connects with non-shortest path, and the relative time criterion for eliminating the non-shortest path in the loop is proposed. By loop simplification, the complicated network can be simplified into radial network. The fault position can be calculated accurately in the radial network with network-based traveling wave fault location algorithm. Simulation results show that the network simplification method is easy to implement, and suitable for any network structure.