高电压技术2025，Vol.51Issue(2)：903-914,中插38-中插42,17.DOI:10.13336/j.1003-6520.hve.20240339
基于多维时频特征的新型配电系统单相接地故障定位方法
Single-phase-to-ground Fault Section Location in New-type Distribution System Based on Multidimensional Time-frequency Distribution Characteristics
摘要
Abstract
The fault characteristics of transient phase currents should be fully captured and analyzed for fault phase,fault feeder and fault section identification in new-type distribution system integrated with renewable energy sources.To solve this problem,the transient distribution characteristics of phase currents in new-type distribution system are analyzed when single-phase-to-ground fault occurs,and a novel method of single-phase-to-ground fault section location in new-type dis-tribution system is proposed and discussed.The proposed method is realized by using the difference of multidimensional time-frequency distribution characteristics of phase currents.According to the difference between the fault transient quan-tity of the fault phase current and that of the healthy phase current,the fault phase selection is completed by the grey correlation algorithm.The 26-dimensional multidimensional time-frequency features are extracted from the faulty phase current transient waveforms of the monitoring points at the beginning of each outlet and the branch monitoring points of the fault feeder.The VTSNE is used to screen and reduce the dimension,and the processed feature data are subjected to DBSCAN to complete fault line selection and fault section location.This method is verified in a 10 kV new-type distribu-tion system in some seaport,which satisfies the adaptability under different fault initial phase angles and different transition resistance faults,and is not limited by the sampling synchronization rate of monitoring points.关键词
新型配电系统/故障定位/多维时频特征/t-SNE降维/DBSCAN聚类Key words
new-type power distribution system/fault location/multidimensional time-frequency characteristics/t-distributed stochastic neighbor embedding/density-based special clustering of application with noise引用本文复制引用
鲁晓天,唐金锐,尹昕,黄云辉,周克亮,袁成清..基于多维时频特征的新型配电系统单相接地故障定位方法[J].高电压技术,2025,51(2):903-914,中插38-中插42,17.基金项目
国家重点研发计划(2021YFB2601602) （2021YFB2601602）
国家自然科学基金(52337006).Project supported by National Key R&D Program of China(2021YFB2601602),National Natural Science Foundation of China(52337006). （52337006）
