摘要
针对小电流单相接地故障电流微弱、故障因素众多,选线判据单一,选线成功率不高的情况,本文提出了多判据融合的故障选线方法,该方法能充分利用发生故障时的暂态分量、稳态分量,利用小波变换的奇异性检测理论、零序电流群体比幅比相原理及能量法融合来提高选线精度。实验结果表明,该方法能有效提高小电流接地选线的可靠性。
It is presented fault feeder detecting criterion based on multiple criteria fusion for single-phase-to - ground fault （SPGF） in power distribution systems to overcome the disadvantages in it as very weak signals, complex fault situations, single criteria and low effeciency. In order to improve the precision it is applied multi- pie criteria fusion based on fusion with wavelet transform methods, amplitude and phase comparative methods of zero-sequence currents, energy method. It is shown in the simulation experiment that fault-line reliability can be greatly improved by use of not only transient component but also steady component of fault information.
出处
《东北电力大学学报》
2010年第1期53-56,共4页
Journal of Northeast Electric Power University
基金
吉林省教育厅"十一五"科学技术研究项目(吉教科合字[2009]第101号)
关键词
小电流
单相接地故障
多判据融合
故障信息
low current
single-phase-to-ground fault
multiple criteria fusion
fault information
