桂林电子科技大学学报2017，Vol.37Issue(3)：234-239,6.
基于高频零序电流幅相归一的分布式电网单相接地故障选线方法
A single-phase earth fault line selection method in distributed power system based on the unity of amplitude and phase of high frequency zero-sequence current
摘要
Abstract
According to the problems for criterion calculation and complicated for selection steps in distribution network with DG,a new fault line selection method is presented.This method combines ensemble empirical mode decomposition (EEMD) and cubic spline interpolation (CSI) method to obtain amplitude-phase-unity criterion of transient high frequency components of zero-sequence current.The zero-sequence current is decomposed into several intrinsic mode function (IMF) components by EEMD algorithm.For obtaining amplitude-phase-unity criterion of high frequency component,the envelope curve of the first IMF component is drawn by CSI method.The fault line can be selected by observing the first characteristic peak of amplitude-phase-unity envelope curve.Simulation analysis shows that this method is simple and accuracy for selecting the fault line at a high running speed.It is free from the influence of conditions such as the fault resistor and fault phase angle of voltage.关键词
DG并网变压器/零序电流/EEMD/三次样条插值法/包络线Key words
interconnection transformer of distributed generation/zero-sequence current/ensemble empirical mode decomposition/cubic spline interpolation method/envelope curve分类
信息技术与安全科学引用本文复制引用
杨志豪,李彩林,刘晓祥,李春泉..基于高频零序电流幅相归一的分布式电网单相接地故障选线方法[J].桂林电子科技大学学报,2017,37(3):234-239,6.基金项目
国家自然基金(51465013) （51465013）
广西教育厅科研项目(YB2014138) （YB2014138）
