高压电器2024，Vol.60Issue(7)：201-209,9.DOI:10.13296/j.1001-1609.hva.2024.07.022
基于S变换模能量分析的直流电缆故障测距
Fault Location of DC Cable Based on S-transform Mode Energy Analysis
摘要
Abstract
In view of such issues as low accuracy of fault location and and weak generalization ability of location mod-el in the fault location method of existing high voltage DC cable,a kind of fault location method of time-frequency do-main energy analysis is proposed with consideration of the characteristics of rich fault information in the transient sig-nal generated by the fault point after the fault of the cable.The method uses the characteristics of multi-class support vector machine to construct a DC cable fault location model,uses the DC cable phase mode decoupling matrix to de-couple the electrical parameters of the cable,and adopts the S-transform to perform time-frequency domain conver-sion.The obtained modulus is used to construct mode energy and is used as the sample to trains the SVM model.The experimental results show that the proposed method can accurately measure the distance of different types of faults under different transition resistances and different locations.关键词
S变换/SVM模型/相模解耦/模能量/故障定位Key words
S-transform/SVM model/phase mode decoupling/mode energy/fault location引用本文复制引用
夏向阳,刘奕玹,刘雄,夏君山,王瑞琪,朱鹏..基于S变换模能量分析的直流电缆故障测距[J].高压电器,2024,60(7):201-209,9.基金项目
国家自然科学基金项目(51977014) （51977014）
湖南省自然科学基金项目(2020JJ6054) （2020JJ6054）
湖南省教育厅科学研究重点项目(22A0230). Project Supported by National Natural Science Foundation of China(51977014),Natural Science Foundation of Hunan Province(2020JJ6054),Key Scientific Research Project of Hunan Provincial Department of Education(22A0230). （22A0230）
