基于改进矩阵算法的含分布式电源配电网故障定位

Fault Location of Distribution Network with Distributed Generation Based on Improved Matrix Algorithm

摘要: 分布式电源(Distributed generation, DG)的接入对配电网故障定位提出了更高的要求。为了解决含DG配电网中T接区段可能导致基于传统矩阵算法的故障定位错判的问题，对传统矩阵算法进行了改进。首先，基于配电网拓扑连接关系和馈线终端单元(Feeder terminal unit, FTU)上传故障过电流信息，构建网络描述矩阵和故障信息矩阵，计算得到故障判断矩阵；其次，若配电网中T接区段的两个子节点FTU上传信息不同，修正故障判断矩阵；最后，利用故障定位判据定位故障区段。算例结果表明，本文所提方法在含DG配电网存在T接区段情况下发生单重、多重故障时，仍能准确地定位故障区段。

Abstract: The access of distributed generation (DG) puts forward higher requirements for fault location of distribution network. In order to solve the problem that the T-wiring segment in the distribution network with DG may lead to the misjudgment of the matrix algorithm fault location, the traditional matrix algorithm is improved. Firstly, based on the topology connection relationship of the distribution network, and the feeder terminal unit (FTU) uploading fault overcurrent information, the network description matrix and the fault information matrix are constructed, and the fault judgment matrix is calculated. Secondly, if the FTU uploading information of the two sub-nodes of the T-wiring segment in the distribution network is different, the fault judgment matrix is corrected; finally, the fault section is located by using the fault location criterion. The results of the example show that the proposed method can locate fault sections accurately when single and multiple faults occur in the case of T-wiring segment in the distribution network with DG.