基于波形相似度的配电网故障选线新方法A New Method of Fault Line Selection in Distribution Network Based on Waveform Similarity
俞晨昊,王春蘅,陈中颖,司强,罗维真,姚毅杰
YU Chenhao,WANG Chunheng,CHEN Zhongying,SI Qiang,LUO Weizhen,YAO Yijie
摘要(Abstract)：
小电流接地方式在配电网中应用广泛,传统的利用稳态电流进行故障选线与定位的方法局限性很大。通过研究配电网单相接地时的暂态电流信号,发现故障线路与健全线路的波形特征差别很大。提出利用各线路之间波形相关系数的选线方法,根据各条健全线路间相关系数接近、而故障线路与健全线路相关系数相差较大的特点,筛选出故障线路。仿真结果表明,该方法简单实用,定位准确,且不易受到外界因素干扰。
Small current grounding is widely used in the distribution network. The traditional use of steadystate current for fault line selection and positioning is very limited. By study the transient current signal of distribution network in the case of single phase grounding, it is found that fault lines and non-fault lines differ greatly in waveform characteristics. The paper proposes a line selection method based on waveform correlation coefficient to select fault lines in accordance with the fact that the correlation coefficients of non-fault lines are almost the same while those of fault lines and non-fault lines differs greatly. As the simulation shows, the method is simple and practical, and is accurate in positioning and not easily disturbed by external factors.
关键词(KeyWords)：
小电流接地;暂态电流信号;相似度;相关系数
small current grounding;transient current signal;similarity;correlation coefficient
基金项目(Foundation): 南京工程学院大学生科技创新项目(TB201816031)
作者(Author):
俞晨昊,王春蘅,陈中颖,司强,罗维真,姚毅杰
YU Chenhao,WANG Chunheng,CHEN Zhongying,SI Qiang,LUO Weizhen,YAO Yijie
DOI: 10.19585/j.zjdl.201807014
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