Multi-Branch Fault Line Location Method Based on Time Difference Matrix Fitting
作者机构：School of Electrical and Information EngineeringHunan UniversityChangsha410082China Distribution Network Technical CenterState Grid Hunan Electric Power Research InstituteChangsha410007China Technical CenterChina Energy Construction Group Hunan Thermal Power ConstructionZhuzhou412011China School of Electrical and Information EngineeringChangsha University of Science and TechnologyChangsha410076China
出 版 物：《Energy Engineering》 (能源工程（英文）)
年 卷 期：2024年第121卷第1期
页 面：77-94页
核心收录：
学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学]
主 题：Multi-branch lines distribution network fault location double-ended traveling wave positioning least square method
摘 要：The distribution network exhibits complex structural characteristics,which makes fault localization a challenging *** when a branch of the multi-branch distribution network fails,the traditional multi-branch fault location algorithm makes it difficult to meet the demands of high-precision fault localization in the multi-branch distribution network *** this paper,the multi-branch mainline is decomposed into single branch lines,transforming the complex multi-branch fault location problem into a double-ended fault location *** on the different transmission characteristics of the fault-traveling wave in fault lines and non-fault lines,the endpoint reference time difference matrix S and the fault time difference matrix G were *** time variation rule of the fault-traveling wave arriving at each endpoint before and after a fault was comprehensively *** realize the fault segment location,the least square method was *** was used to find the first-order fitting relation that satisfies the matching relationship between the corresponding row vector and the first-order function in the two matrices,to realize the fault segment ***,the time difference matrix is used to determine the traveling wave velocity,which,combined with the double-ended traveling wave location,enables accurate fault location.
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