基于小波变换和分支定位的T接输电线路故障测距方法研究  

Research on Fault Location Method of T-Connection Transmission Line Based on Wavelet Transform and Branch Location

作　　者：张子豪 姚晓东[1] ZHANG Zi-hao;YAO Xiao-dong(shanghai dianji university,Shanghai 201306,China)

机构地区：[1]上海电机学院,上海201306

出　　处：《新一代信息技术》2019年第18期88-93,共6页New Generation of Information Technology

基　　金：上海市科委基金(项目编号:07DZ11307)。

摘　　要：为了解决传统方法在多端输电线路故障定位不精确,定位方法复杂等问题,本文提出了一种基于分支定位的T接输电线路故障定位的方法,通过提取故障行波,经过小波变换得到故障行波的时间和频率信息,找到原始的故障行波第一个反射波,进行故障分支定位计算,确定故障距离。与传统的故障阻抗法相比,该方法配合同步数据接收装置,使得计算方法更加简单且定位精度更高。最终使用了PSCAD/EMTDC进行了大量仿真实验,结果显示输电线路单相接地故障定位误差能够维持在0.21%,远高于传统方法,验证了本方法的有效性。In order to solve the traditional method in multi-terminal transmission line fault location is not accurate,complex locating method and so on,this paper proposes a branch location based T transmission line fault location method,by extracting the fault traveling wave,wavelet transform to obtain fault traveling wave time and frequency information,find the original fault line the first reflection wave,the fault branch location and calculation,determine the fault distance.Compared with the traditional fault impedance method,this method is simple and accurate with synchronous data receiving device.Finally,PSCAD/EMTDC was used to conduct a large number of simulation experiments,and the results showed that the positioning error of single-phase grounding fault of transmission lines could maintain at 0.21%,much higher than the traditional method,which verified the effectiveness of this method.

关 键 词：小波变换 T接输电线路 分支定位 故障测距 

分 类 号：TM75[电气工程—电力系统及自动化]