基于暂态高频分量的故障投票选线方法  

Fault Voting Method Based on Transient High Frequency Components

作　　者：吴君 谢逸飞 张长森 WU Jun;XIE Yifei;ZHANG Changsen(School of Physics and Electronic Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China;School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学物理与电子信息学院,河南焦作454000 [2]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《电子科技》2022年第7期64-70,共7页Electronic Science and Technology

基　　金：国家自然科学基金(51174263);河南省基础与前沿技术研究项目(142300410148)。

摘　　要：针对现有小电流系统单相接地故障暂态选线特征信息提取、处理以及选线精度的问题,文中对故障进行暂态特征分析,发现各线路暂态零序电流中高频分量具有明显差异。据此结果,文中提出了一种基于暂态零序电流高频分量的波形相似性的投票选线方法。结合VMD算法和巴氏距离算法,分解各条线路的零序电流,得出暂态高频分量,进而求得各线路间暂态高频分量的巴氏系数。然后对系数矩阵采用初步投票与k值检验的方法进行投票,从而判断出故障线路。不同故障情况下的仿真结果表明该方法简单可靠,选线精度及可信度高,具有广泛的适用性和一定的抗干扰性。In view of the problems of extraction and processing of transient line selection characteristics of single-phase grounding faults in existing low-current systems,as well as line selection accuracy,this study analyzes the transient characteristics of the faults and finds that the high-frequency components of the transient zero-sequence currents of various lines have obvious differences.Accordingly,a voting line selection method based on waveform similarity of high-frequency components of transient zero sequence current is proposed.Combined with VMD algorithm and Bhattacharyya distance algorithm,the zero sequence current of each line is decomposed to obtain the transient high frequency components,and then the Bhattacharyya coefficients of the transient high frequency components among the lines are obtained.The fault line is voted by the method of preliminary voting and k-value test on the coefficient matrix.The simulation results under different fault conditions show that the method is simple and reliable,with high accuracy and credibility of line selection,wide applicability and certain anti-interference.

关 键 词：小电流接地系统 单相接地故障 暂态零序电流 高频分量 VMD 巴氏距离 波形相似性 投票机制 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置] TN99[自动化与计算机技术—控制科学与工程]