中国电机工程学报2024，Vol.44Issue(10)：3766-3776,中插2,12.DOI:10.13334/j.0258-8013.pcsee.230032
不依赖GNSS的输电线路双端行波故障测距
A GNSS-independent Two-terminal Traveling Wave Fault Location Scheme for Transmission Lines
摘要
Abstract
Two-terminal traveling wave-based fault location is essential for transmission line fault recovery.To synchronize the data,the traditional method relies heavily on the global navigation satellite system(GNSS),leading to a risk of signal error.Considering the propagation delay and time shift invariance of traveling waves,this paper proposes a two-terminal traveling wave fault location scheme without GNSS.In theory,this paper analyzes the influence of time synchronization error and the phase angle difference of the pre-fault directional traveling wave.The feasibility of two-terminal fault location by calculating pre-fault directional traveling wave phasor is proved by formula derivation.In algorithm,the proposed algorithm detects the arriving time of the initial current traveling wave by dyadic wavelet transform.Then,the directional traveling wave is processed by the discrete Fourier transform algorithm.Considering the transfer characteristics of Capacitive Voltage Transformers(CVT),the proposed scheme performs well under different fault conditions,sampling frequency and noise interference.Since no additional hardware is required,the proposed scheme could be conveniently integrated into existing devices.关键词
输电线路/行波故障测距/全球导航卫星系统/非同步数据/行波传播Key words
transmission lines/traveling wave fault location/global navigation satellite system(GNSS)/unsynchronized data/traveling wave propagation分类
动力与电气工程引用本文复制引用
亓臻康,王浩宗,董新洲,洪启腾..不依赖GNSS的输电线路双端行波故障测距[J].中国电机工程学报,2024,44(10):3766-3776,中插2,12.基金项目
国家自然科学基金项目(52061635105).Project Supported by National Natural Science Foundation of China(52061635105). （52061635105）
