广东电力2025，Vol.38Issue(1)：63-72,10.DOI:10.3969/j.issn.1007-290X.2025.01.007
基于暂态电压波形相似度的输电线路单端故障定位方法
Single-terminal Fault Location for Transmission Lines Based on Transient Voltage Waveform Similarity
摘要
Abstract
In view of the fact that the single-terminal method of AC transmission line is easily affected by wave head identification and transition resistance,and most of them don't take into account the line frequency variation characteristics,this paper proposes a single-terminal fault location method based on transient waveform similarity.Firstly,it derives the transient voltage equation of the fault by combining the fault boundary conditions.Afterwards,it builds a transient analytical model in the complex frequency domain considering the frequency variation characteristics of the line,solves the transient voltage frequency domain equation after the first fault traveling wave propagates to measuring device,and obtains the transient voltage time domain solution by Laplace inverse transform.Then,it compares the analytic voltage waveform with the actual measured waveform for cosine similarity,so as to solve the fault distance.Finally,it uses PSCAD/EMTDC for simulation verification.The results show that the proposed method can accurately locate the fault under various fault conditions,and is not affected by the transition resistance,and is less affected by sampling frequency,which has strong robustness.关键词
交流输电线路/单端测距/复频域/暂态解析波形/余弦相似度Key words
AC transmission line/single-terminal fault location/complex frequency domain/transient resolution waveform/cosine similarity分类
动力与电气工程引用本文复制引用
聂德志,刘铠滢,蔡桂潮,吴添权,谢伟宏,骆政呈,李海锋..基于暂态电压波形相似度的输电线路单端故障定位方法[J].广东电力,2025,38(1):63-72,10.基金项目
中国南方电网有限责任公司科技项目(035100KC23070005/GDKJXM20230757) （035100KC23070005/GDKJXM20230757）
