一种量化零模波速的电力线路故障测距迭代算法  

An Iterative Algorithm for Power Line Fault Ranging to Quantify Zero-Mode Wave Velocity

作　　者：刘宇[1,2] 赵海龙 LIU Yu;ZHAO Hailong(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;Key Laboratory of Physical and Chemical Analysis for the Hainan Power Grid,Haikou 570311,China;Hainan Power Grid Co.,Ltd.Electric Power Science Research Institute,Haikou 570311,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]热带智能电网实验室,海口570311 [3]海南电网有限责任公司电力科学研究院,海口570311

出　　处：《电工材料》2025年第2期76-80,86,共6页Electrical Engineering Materials

基　　金：中国南方电网有限责任公司科技项目(073000KK52200016)。

摘　　要：电力线路发生接地故障时产生的零模波速度随故障距离变化而不稳定,导致基于行波模量速度差的单端行波测距法在不同的故障距离下可能带来较大的误差。通过分析发现了零模波速度大小和行波传输距离的单调性关系;利用最小二乘法拟合了零模波速度和故障距离的函数关系;给出电力线路接地故障测距的牛顿迭代算法,量化了零模波速度;通过Matlab对10 kV典型配电网进行仿真,仿真结果证明了该算法的可靠性。The zero-mode wave velocity generated by the power line when the ground fault occurs is unstable with the change of fault distance,which leads to a large error of the single-ended traveling wave ranging method based on the traveling wave modulus velocity difference at different fault distances.The monotonicity relationship between the zero-mode wave velocity and the traveling wave transmission distance was found through analysis,the functional relationship between the zero-mode wave velocity and the fault distance was fitted by the least squares method,and the Newton's iterative algorithm for the power line grounding fault ranging was given,and the zero-mode wave velocity was quantified.The 10 kV typical distribution network was simulated by Matlab,and the simulation results proved the reliability of the algorithm.

关 键 词：电力线路 模量速度差 行波测距 零模波速度 牛顿迭代法 

分 类 号：TM726[电气工程—电力系统及自动化]