Comparative fault location algorithms for regional distribution network with distributed generator

Abstract

Traditional matrix algorithm endures advantages of low requirements in FTU, high accuracy in Single–supply and radiation distribution network and so on. However, it will meet with erroneous judgment when it is used traditional matrix algorithm as long as it inserts with distributed generator. This article mainly focuses on analyzing the limitation of uses of implementation rational, which deals with the implementation of the matrix algorithm in the fault location algorithms in distribution network, applied in the distribution network with distributed generation. Then realizing a modified T-matrix algorithm based on these problems remained to be solved. Introduction: This algorithm structures the information matrix of the sectionalized distribution network[1-4] based on the location information offered by FTU and progressively modifies it based on the multi-branched directional information, requires the associated node judgment matrix and lists describing matrix of network based on the data flow collected from the SCADA system [5-6]. Finally, adding the network matrix to fault matrix to get the fault judgment matrix and determine the fault section [7-8] based on the criteria. The article discusses its implementation rationale in practical application and tests the application and accuracy of the modified T matrix algorithm in combination with case studies to improve the reliability of the T matrix algorithm [9] in solving the problems of the high misjudgment in location fault sections in the distribution network with multi-distributed generator based on traditional algorithm. The fault location rationale in distribution network based on rectangle algorithm and analysis of its limitations The basis principle of the application in traditional matrix algorithm of fault location in distribution network is the to combine the utilization of fault information required from the FTU based on the foundation of graph theory with the topology of the distribution network to acquire the describing network matrix and fault information matrix to realize the location of the fault based on the results of the criteria after the calculation between matrixes. The network information collected from the SCADA of the distribution network is the data foundation of the automatic processing of the fault location. When operating normally, it can combine with the undirected graph describing network topology to acquire the describing network matrix D based on real-time switch status and the branch current information. 1