基于DTCW-ERE的小电流接地系统故障选线  

Fault line selection for small current grounding system based on DTCW-ERE

作　　者：张淑清[1] 王佳森[1] 张立国[1] 胡永涛[1] 李明星[1] 张航飞[1] 

机构地区：[1]燕山大学测试计量技术及仪器河北省重点实验室,秦皇岛066004

出　　处：《仪器仪表学报》2016年第3期505-511,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51475405;61077071);河北省自然科学基金(F2015203413;F2015203392);河北省高等学校科技研究重点(ZD2014100);秦皇岛市科技计划(201502A043)项目资助

摘　　要：小电流接地系统发生单相接地故障时,各馈线的小波能量分布各不相同。本文提出了一种基于故障线路小波综合能量相对熵的选线新方法。双树复小波变换(DTCWT)具有很好的近似平移不变性和抗混叠性;能量相对熵(ERE)具有对信号间细微差别进行识别的超强能力。结合双树复小波变换与能量相对熵的优点,根据故障线路综合小波能量相对熵最大的原则进行选线,能够使故障选线更直观、快速有效。仿真结果表明,该方法可以准确有效的进行配电网故障选线。When single-phase grounding fault occurs in small current grounding system,the wavelet energy distribution is different in each feeder. This paper proposes a new current single-phase fault line selection method based on Dual Tree Complex Wavelet Energy Relative Entropy of faulty feeder. Dual-Tree Complex Wavelet Transform（DTCWT） has the characteristics of approximate shift-invariance and anti-aliasing.Energy Relative Entropy（ERE） has the ability of recognizing subtle differences of the signals. Combining the advantages of Dual-Tree Complex Wavelet Transform and Energy Relative Entropy,the fault line should be selected according to the principle that the fault line complex wavelet energy entropy is maximum,which makes the line selection more intuitive,fast and effective. The simulation results show that the method could achieve the fault line selection in distribution network accurately and effectively.

关 键 词：单相接地 故障选线 双树复小波变换 能量相对熵 

分 类 号：TM74[电气工程—电力系统及自动化] TH183.3[机械工程—机械制造及自动化]