期刊论文

Research on fault traveling wave location method for multi-terminal transmission lines based on difference matrix

中文

电测与仪表

1001-1390

2018

55

16

64-71

10.3969/j.issn.1001-1390.2018.16.012

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

本校为第一机构

针对现有多端输电线路故障行波检测困难、定位精度不高、判定算法复杂等问题,提出一种基于变分模态分解(VMD)算法和Hilbert变换相结合的行波检测法和一种基于差值矩阵的多端输电线路故障行波定位算法.首先通过行波传感器采集故障行波信号,利用VMD分解算法对故障行波进行分解,结合Hilbert变换提取模态分量IMF1的瞬时频率,根据第一个瞬时频率的奇异点位置确定故障行波的达到时刻.然后利用行波到达各端的时间和行波传输原理,得到多端输电线路故障分支判定矩阵.最后根据故障分支判定矩阵确定故障支路,实现故障点的精确定位.ATP/EMTP仿真结果表明,所提检测方法能够准确检测故障初始行波的到达时间,多...

In order to solve shortcomings of existing multi-terminal transmission lines methods and improve fault location accuracy,a novel fault toveling detection method is proposed based on VMD-Hilbert transfomation and a novel fauh location method for multi-terminal transmission lines is proposed based on difference matrix.Fault traveling signals are decomposed into several IMF signals by VMD method.Then IMF1 signal is analyzed by Hilbert transformation.According to the first singular point position of instantaneous frequency time,the traveling wave arrival time is determined.Based on traveling wave ...