电力系统及其自动化学报2017，Vol.29Issue(1)：30-36,7.DOI:10.3969/j.issn.1003-8930.2017.01.006
基于暂态相电流特征分析的故障选线新方法
Novel Method of Fault Line Selection Based on Characteristic Analysis of Transient Phase-current
摘要
Abstract
In order to solve the problem of poor effect of fault line selection when a single-phase grounding fault occurs in the neutral indirect ground system,the distribution characteristics of fault component of current in every phase on the fault lines and non-fault lines and the phase-current frequency are analyzed in detail. It is shown that the difference be⁃tween waveforms of fault components in fault phase and non-fault phase on the fault line are obvious,and the frequency band where transient signals gather is lower for fault phase. However,the amplitudes of fault components in every phase on the non-fault line are the same,their waveforms agree with each other,and the frequency band where transient sig⁃nals gather is higher for fault phase. Therefore,a method of fault line selection is proposed in this paper,which uses fault components of phase-current and the frequency of gravity center as two criterions. With fault characteristic dis⁃tance,these two criterions can complement with each other,which can further improve the margin. Simulation results show that the method has better effects when a high-resistance grounding fault occurs in the context of small initial an⁃gle. Moreover,it has good applicability,reliable selection and strong anti-interference ability.关键词
故障选线/配电网/相关系数/重心频率/相电流Key words
fault line selection/power distribution network/correlation coefficient/frequency of gravity center/phase-current分类
信息技术与安全科学引用本文复制引用
刘谋海,王媛媛,曾祥君,方涛,肖湘奇,黄宇浩..基于暂态相电流特征分析的故障选线新方法[J].电力系统及其自动化学报,2017,29(1):30-36,7.基金项目
国家自然科学基金资助项目（61233008，51207013）；湖南省科技重大专项资助项目（2012FJ1003）；湖南省高校产业化培育资助项目 （）
