基于图论的配电网故障行波定位新算法
A Traveling Wave Fault Location Algorithm for Distribution Network Based on Graph Theory
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摘要: 配电网结构复杂,分支多,故障点定位困难。传统基于输电线路单端或双端信息的故障定位算法难以满足配电网高精度故障定位要求。提出了基于多端时间信息的配电网故障行波定位新算法,构建了配电网关联矩阵和距离矩阵,给出了故障分支的判别方法;基于二叉树模型,根据配电网末端的行波到达精确时间信息和配电网拓扑结构矩阵,剔除无效行波波头时间,综合利用有效的行波波头时间信息,实现配电网故障的实时精确定位。EMTP仿真结果表明,该方法能实现配电网故障的准确定位。Abstract: In view of the incapability of the traditional traveling wave fault location method for transmission lines of meeting the requirement on high precision location of the distribution network that is complex and profusely branching in structure,a new traveling wave fault location method based on multiple time information is proposed.The incidence matrix and distance matrix are built to judge the selection of fault.Based on the model for the location binary tree,the algorithm only uses time information and the structure of the distribution network to delete the ineffective arrival time of traveling wave and realize accurate fault location.EMTP simulation results show that the method has fairly high fault location precision and can meet the requirements of power network operation.