考虑多端行波时差的多分支有源配电网单相故障定位方法  

Single Phase Fault Location Method for Multi Branch Active Distribution Network Considering Multi Terminal Traveling Wave Time Difference

作　　者：熊茜 金鑫琨 何子君 XIONG Qian;JIN Xinkun;HE Zijun(Chengdu Power Supply Company of State Grid Sichuan Electric Power Company,Chengdu 610000,China)

机构地区：[1]国网四川省电力公司成都供电公司,四川成都610000

出　　处：《微型电脑应用》2024年第10期252-256,共5页Microcomputer Applications

摘　　要：有源配电网中,多个分支存在交互作用,一旦出现故障,故障信号可能会受到其他分支的影响,造成故障信号混叠,难以准确定位故障点。为此,提出考虑多端行波时差的多分支有源配电网单相故障定位方法。依据多分支有源配电网拓扑结构模型,针对单分支支路和多分支支路情况,分别构建故障查询矩阵,通过分析故障查询矩阵中元素变化情况来确定单相故障线路;采用多端行波时差原理,根据故障支路末端和主馈线两端到达的时间信息计算实际故障距离,完成单相故障位置确定。实验结果表明,该方法在多分支有源配电网单相故障定位方面具有较高的检测精度,定位误差范围显著缩小,可将误差控制在20 cm以下。In an active distribution network,multiple branches interact with each other.Once a fault occurs,the fault signal may be affected by other branches,which causes aliasing of fault signal and makes difficult to accurately locate the fault point.To this end,a single phase fault location method for multi branch active distribution network considering multi terminal trave-ling wave time difference is proposed.Based on the topological stgructure model of multi branch active distribution network,fault query matrix is constructed for single branch and multi branches situations,and single phase fault lines are determined by analyzing the element changes in the fault query matrix.Using the principle of multi terminal traveling wave time difference,the actual fault distance is calculated based on the arrival time information at the end of the fault branch and the two ends of the main feeder,and the single phase fault location is determined.The experimental results show that this method has higher de-tection accuracy in single phase fault location in multi branch active distribution network,and the range of location error is sig-nificantly reduced,and can be controlled below 20 cm.

关 键 词：多端行波时差 多分支配电网 有源配电网 故障定位 故障查询矩阵 

分 类 号：TM721[电气工程—电力系统及自动化]