基于拓扑解耦的配网运检故障定位算法

Fault Locating Algorithm of Operating Inspection for Distribution Network Based on Topology Decoupling

针对当前方法对配电网运检故障进行定位时,未考虑对故障电流进行判断,导致故障定位和检测效果差、故障定位精度低的问题,提出基于拓扑解耦的配网运检故障定位算法。根据等效解耦的配电网拓扑结构原理,基于配电网拓扑邻接矩阵,将配电网等效解耦的若干树干网进行组合,并在每个树干网中加入FTU(Feeder Terminal Unit)馈线终端设备,对加入FTU的配电网单树枝支路进行分割。采用基尔霍夫电流定律对故障线路进行计算,判断单树枝支路中的故障电流方向,依据判断结果,利用故障区间判断矩阵,定位配电网运检故障。实验结果表明,该方法的故障测距与实际测距误差小、故障节点检测个数多、误检次数少,其故障定位和检测效果较好,可有效提高故障定位精度。

Aiming at the problem that the current method does not consider the judgment of fault current, resulting in poor fault location and detection effect and low fault location accuracy, a fault locating algorithm for distribution network operation detection based on topological decoupling is proposed. According to the topological structure principle of distribution network with equivalent decoupling, based on the topological adjacency matrix of distribution network, several trunk networks with equivalent decoupling of distribution network are combined, and FTU(Feeder Terminal Unit) feeder terminal equipment is added to each trunk network to divide the single branch of distribution network with FTU. Kirchhoff current law is used to calculate the fault line and judge the fault current direction in the single branch. According to the judgment results, the fault interval judgment matrix is used to locate the operation inspection fault of distribution network. The experimental results show that this method has small error between fault location and actual location, more fault nodes and less false detection times, and its fault location and detection effect is good, which can effectively improve the fault location accuracy.