基于广域行波信息的配电网故障定位方法  

Fault Location Method of Distribution Network Based on Wide-area Traveling Wave Information

作　　者：张文轩 李京[1] 陈平[1] 王雪菲 辛正祥 ZHANG Wenxuan;LI Jing;CHEN Ping;WANG Xuefei;XIN Zhengxiang(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255049,China;State Grid Shandong Qingzhou Power Supply Company,Weifang 262500,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255049 [2]国网山东省电力公司青州市供电公司,山东青州262500

出　　处：《电工技术》2020年第21期94-98,共5页Electric Engineering

摘　　要：针对配电网故障定位困难问题,提出一种基于广域行波能量与时差的配电网故障定位新方法。首先分析了故障后行波能量的守恒和衰减原理,根据检测点获得的故障信息计算行波能量,直接确定故障区段;然后对故障区段两侧检测点进行访问,扩展为多级有效测距网络,提出三端测距法计算多级故障距离;对多个测距结果运用Grubbs检验法处理,确定故障点。理论分析与仿真结果表明,该算法具有准确性和可行性,不受波速度影响,鲁棒性强。Aiming at the difficulty of fault location in distribution network,a novel method for fault location in distribution network based on wide-area traveling wave energy and time difference was proposed.Firstly,the principle of conservation and attenuation of traveling wave energy after failure was analyzed,and the traveling wave energy was calculated based on the fault information obtained at the detection point to directly determine the fault zone.Then,the detection points on both sides of the fault zone were accessed to expand to multi-level effective measurement.Three-terminal distance measurement method was proposed to calculate the multi-level fault distance.The Grubbs test method was used to determine the fault points.Theoretical analysis and simulation results showed the accuracy and feasibility of the algorithm,which was not affected by wave speed and was robust.

关 键 词：行波 小波能量谱 三端测距法 Grubbs检验 故障定位 

分 类 号：TM773[电气工程—电力系统及自动化]