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文章摘要
基于差值矩阵的多端输电线路故障定位研究
Research on fault traveling wave location method for multi-terminal transmission lines based on difference matrix
Received:August 30, 2017  Revised:August 30, 2017
DOI:
中文关键词: 行波检测  多端输电线路  行波定位  差值矩阵  变分模态分解
英文关键词: traveling wave detection  multi-terminal transmission lines  Traveling wave location  difference matrix  variational mode decomposition
基金项目:湖南省重点研发计划(2016GK2013)
Author NameAffiliationE-mail
Gao Xiaogang Qinhuangdao Power Supply Corporation State Grid Jibei Electric Power Company Limited gaofei380180443@qq.com 
Xie Liwei* School of Electrical and Information Engineering, Changsha University of Science and Technology fengxlw@qq.com 
Zeng Xiangjun School of Electrical and Information Engineering, Changsha University of Science and Technology eexjzeng@hotmail.com 
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中文摘要:
      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,多端输电线路定位算法能够准确判定故障支路,相比于HHT检测方法下的定位算法,进一步提高了定位精度。
英文摘要:
      To solve shortcomings of existing multi-terminal transmission lines methods and improve fault location accuracy, a novel fault traveling detection method is proposed based on VMD-Hilbert transformation and a novel fault 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 arrival times at each terminal and traveling wave transmission principle, a fault branch judgment matrix for multi-terminal transmission lines is built. According to fault branch judgment matrix, fault branches and fault location are determined. Simulation results show that the proposed method can accurately detect the arrival times of fault traveling wave and multi-terminal transmission lines location algorithms can accurately determine fault branches and realize precise location.
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