基于FTU的配电网故障区段判断算法

Algorithm for Fault Section Judgement in Power Distribution Network Based on FTU

通过分析配电网馈线单一故障情况下 ,其故障点必位于两个相邻的开关之间。有故障电流和没有故障电流流过的开关 ,其FTU所采集的信息不相同。因此在基于FTU的馈线自动化系统中 ,其故障区段的判断可简化为考察相邻开关信息的异或逻辑计算。忽略电网中的其它元件 ,将电网从结构上简化为以开关当作节点的网络 ,应用电工网络图论原理建立节点的邻接矩阵和节点信息矩阵。论述了一种馈线网络故障时的故障区段判断矩阵。分析故障判断矩阵中元素的性质 ,得出采用异或算法可以判断出故障区段。并通过算例验证了其正确性。

In case a single fault occurs on a power feeder, the fault section must be between two adjacent switches, and the FTU information about fault currents passing through these switches must be different. Therefore the fault section can be distinguished from the normal ones by analyzing the information. The power distribution network can be simplified as switch node network. By applying electric network graphic theory its adjacent node matrix and node information matrix can be derived. The fault section judgement matrix of power distribution network in fault is presented. By studying the characteristic of fault judgement matrix elements an algorithm with XOR logic operation for fault section judgement in power distribution network is obtained. Examples are given to verify its correctness.