A Method of Fault Location in Distribution Network Based on Directed Graph
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摘要: 为提高配电网的故障定位效率,减少因故障停电带来的损失,本文基于有向图提出了一种配电网故障定位的新方法。它利用主站接收到的故障指示器动作信号,通过构造节支关联矩阵和线路电流向量,进行两者相乘运算,确定故障所在区段。所提方法无需规格化处理,可实现含分布式电源接入、多重故障和闭环运行的复杂配电网故障定位,具有较强的容错能力。文中不仅应用KCL电流定律从理论证明了方法的正确性和适用性,而且还在某市配电网系统上进行了仿真。结果表明了该方法可以用于实际配电网,具有很大的应用前景。Abstract: In this paper, a new fault location method for distribution system based on the directed graph is proposed to improve the fault locating efficiency of distribution network and reduce the losses caused by fault outage. By applying actuating signals of fault indicators received from master station, the bus branch incidence matrix and branch current vector are built, and they are multiplied to determine the location of faulted line sections. No need of normalization processing, proposed approach can locate fault position of complex distribution systems integrated with DGs and work in situation of multiple faults with close loop control, which has better fault tolerant capacity. In this paper, the correctness and applicability are proved by KCL theory, and the simulation on a city distribution system is carried out. The results show that proposed method can be used in practice, which has a great prospect in application.
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Keywords:
- fault location /
- fault indicator /
- directed graph /
- closed loop /
- distributed generator
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