电力系统及其自动化学报2019，Vol.31Issue(2)：126-134,9.DOI:10.3969/j.issn.1003-8930.2019.02.020
基于VMD和S变换的多端输电线路故障定位
Fault Location of Multi-terminal Transmission Lines Based on VMD and S Transform
摘要
Abstract
Considering that the traveling wave signal with strong noises is difficult to extract,a fault traveling wave ex?traction method based on variational mode decomposition(VMD)and S transform is proposed. The fault traveling wave signal is decomposed by VMD,then the fault break point is obtained by S transform to determine the arriving time of fault traveling wave. In light of the uncertainties of fault traveling wave velocity and line length,a two-terminal location method is proposed based on the transmission process of fault traveling wave and zero line mode component,which is not affected by the traveling wave velocity. Based on the differences in line distance before and after fault,a fault branch determination matrix is established;the corresponding determination principle is proposed,and the fault loca?tion is calculated by using the column elements of the fault branch terminal. Simulation results show that the method pro?posed in this paper can effectively extract the traveling wave signal with strong noise interference;compared with the ex?isting fault location method for multi-terminal transmission lines,the proposed fault location method has obvious advan?tages,which further improves the location accuracy.关键词
行波检测/变分模态分解/S变换/多端输电线路/故障定位Key words
traveling wave detection/variational mode decomposition/S transform/multi-terminal transmission line/fault location分类
信息技术与安全科学引用本文复制引用
谢李为,柳祎璇,曾祥君,毛宇..基于VMD和S变换的多端输电线路故障定位[J].电力系统及其自动化学报,2019,31(2):126-134,9.基金项目
国家自然科学基金资助项目(51425701,61233008) （51425701,61233008）
国家重点研发计划资助项目(2016YFB0900605,2017YFB0902903) （2016YFB0900605,2017YFB0902903）
湖南省重点研发计划资助项目(2016GK2013) （2016GK2013）
