单-多端行波组合的架空线配电网单相接地故障定位方法.pdfVIP

学兔兔 第52卷 第16期 电测与仪表 VOI．52 NO．16 2015年 8月25日 Electrical Measurement＆ Instrumentafion Aug．25，2015 单一多端行波组合的架空线配电网单相接地故障定位方法水 曹晶，曾祥君，杨毅，刘慧琼 (长沙理工大学智能电网运行与控制湖南省重点实验室，长沙410114) 摘要：针对配电网网络结构复杂，分支多，故障定位困难，提出了一种单端、多端行波相结合的配电网单相接地故障定 位方法。首先根据配电网拓扑结构，依据最优配置原则，选取需安装行波定位装置的配变终端，然后通过奇异值分解 (SVD)对故障行波信号进行检测，应用多端行波故障选线算法判别障故障线路。在此基础上，各行波定位装置采用 小波波形相关『生方法，检测两个相关反射波时间差进行单端行波测距。仿真结果表明，该方法在某台定位装置失灵、 时间记录错误时也能实现配电网的故障准确定位，具有很强的容错性和较高的定位精度。 关键词：配电网；单相接地；多端行波；单端行波；故障定位 中图分类号：TM77 文献标识码：B 文章编号：1001—1390(2015)16—0032—06 A single--phase—ground fault location method for overhead distribution networks based Oil single-terminal and multi-terminal travelling wave Cao Jing，Zeng Xiangjun，Yang Yi，Liu Huiqiong (Hunan Province Key Laboratory of Smart Grids Operation and Control，Changsha University of Science and Technology，Changsha 410004，China) Abstract：As the actual complex distribution network has many branches，it is very difficult to find the fault point．A single--phase—-ground fault location method based on single--terminal traveling wave and muhi--terminal traveling wave is put forward in this paper．Firstly，according to the optimal allocation principle for the topology structure of the distri— bution network，there are only several location equipments are installed in distribution grid．Singular value decomposi- tion(SVD)is applied to detect the fault travelling signals．The fault line is selected by using multi—terminal traveling wave fault line selection algorithm．On this basis，the travelling wave location device that uses wavelet graphic correla— tion method to detect the time difference