现代电力2025，Vol.42Issue(5)：847-855,9.DOI:10.19725/j.cnki.1007-2322.2023.0248
基于行波时差特性的直流输电线路组合式故障测距方法
Combined Fault Location Method for DC Transmission Lines Based on Traveling-wave Time Difference Characteristics
摘要
Abstract
Aiming to address the issue of the existing traveling wave distance measurement being influenced by frequency variation of wave velocity and time error,a combined fault location method for DC grid transmission lines is proposed based on time difference characteristics of traveling waves.Firstly,the basic principle of fault location is clarified by analyzing the time difference characteristics of the initial backward traveling wave,so as to determine the objective function and construct the original fault location model.Subsequently,the model undergoes two refinements by considering the frequency variation of wave velocity,time error and the results of traditional double-terminal traveling wave ranging method.The virtual fault distance,wave velocity and time errors are then optimized by particle swarm algorithm to achieve accurate fault location.Finally,the effectiveness of the proposed ranging method is verified by digital simulation.A large number of simulation results demonstrate a significant improvement in accuracy and the ability to achieve full-line fault location compared with the traditional double-terminal traveling wave method.It remains unaffected by fault location and exhibits strong resistance to transition resistance(500 Ω).Additionally,it also has low requirements for data synchronization and sampling frequency.关键词
直流电网/故障测距/初始反行波/行波时差特性/粒子群算法Key words
DC grid/fault location/initial backward traveling wave/traveling wave time difference characteristics/particle swarm optimization分类
信息技术与安全科学引用本文复制引用
戴志辉,奚潇睿,秦昊宇,牛宝仪,韦舒清,韩哲宇..基于行波时差特性的直流输电线路组合式故障测距方法[J].现代电力,2025,42(5):847-855,9.基金项目
国家自然科学基金项目(51877084).Project Supported by National Natural Science Foundation of China(51877084). （51877084）
