电测与仪表2016，Vol.53Issue(15)：101-105,5.
EMD 及其能量变化曲线在小电流接地系统故障选线中的应用
Application of EMD and energy curve to fault line detection in un-effectively grounded system
张翠玲 1李云路2
作者信息
- 1. 宁夏理工学院，宁夏石嘴山753000
- 2. 东北大学信息科学与工程学院，沈阳110084
- 折叠
摘要
Abstract
Aiming at the characteristics of the un-effectively grounded systems that the zero-sequence current is non-stationary and nonlinear, a new fault line detection method based on empirical mode decomposition( EMD) and energy curve was proposed in this paper.The advantage of the EMD is its great adaptability, because EMD can decompose the signal according to the change regulation of the signals itself;the energy curve is better than the amplitude at the discrimination of the fault line and non-fault lines.Firstly, each of the zero-sequence current of fault lines was EMD treatment;then we can get the first-order intrinsic mode function( IMF) and its energy curve; finally, the fault line detection can be done by the phase of the first-order IMF and the size of the energy.The results of the simulation and experiment results indicated that the method is reliable and practical.关键词
经验模态分解/本征模态函数/故障选线/接地故障/零序电流Key words
EMD/IMF/fault line detection/ground fault/zero-sequence current分类
信息技术与安全科学引用本文复制引用
张翠玲,李云路..EMD 及其能量变化曲线在小电流接地系统故障选线中的应用[J].电测与仪表,2016,53(15):101-105,5.
