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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 the case of a single fault in the distribution network feeder, the point of failure must be between two adjacent switches. With fault current and no fault current flowing through the switch, the information collected by the FTU is not the same. Therefore, in the FTU-based feeder automation system, the judgment of the fault section can be simplified to the exclusive OR logic calculation of the neighboring switch information. Neglecting the other elements in the grid, the grid is simplified from the structure to a network with switches as nodes. The principle of electrotechnical network graph theory is used to establish the adjacency matrix and node information matrix of nodes. Discusses a fault section judgment matrix in feeder network fault. The properties of the elements in the fault judgment matrix are analyzed, and the result shows that the fault zone can be judged by XOR algorithm. An example is given to verify its correctness.