期刊论文

Fault Location of Multi-terminal Transmission Lines Based on VMD and S Transform

中文

电力系统及其自动化学报

1003-8930

2019

31

2

126-134

10.3969/j.issn.1003-8930.2019.02.020

51425701:国家自然科学基金 61233008:国家自然科学基金 2016YFB0900605:国家重点研发计划 2017YFB0902903:国家重点研发计划 2016GK2013:湖南省重点研发计划资助项目

本校为第一机构

针对强噪声背景下行波信号提取难的现状,提出一种基于变分模态分解VMD(variational mode decomposi?tion)算法和S变换的故障行波提取法.通过对故障行波信号进行VMD分解,利用S变换分析得到故障突变点来确定故障行波达到时刻.针对行波波速和线路长度的不确定性,利用故障行波的传输过程和零线模分量,提出一种与波速无关的双端定位算法.基于故障前线路距离差值和故障后线路距离差值建立故障分支判定矩阵,提出一种适用于多端输电线路的故障定位方法,利用故障支路端的列元素计算故障位置.仿真结果验证所提方法在强噪声干扰下能有效提取行波信号,故障定位算法相比现有多端输电线路故障定位法有明显优势...

Considering that the traveling wave signal with strong noises is difficult to extract , a fault traveling wave extraction 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 aff...