煤矿电网的单相接地故障选线研究  

Research on Single Phase Grounding Fault Line Selection of Coal Mine Power Grid

作　　者：程卫健 史小军 穆艳祥 Cheng Weijian;Shi Xiaojun;Mu Yanxiang(CCTEG Changzhou Research Institute Co.,Ltd.,Changzhou 213015,China;Tiandi(Changzhou)Automation Co.,Ltd.,Changzhou 213015,China)

机构地区：[1]中煤科工集团常州研究院有限公司,江苏常州213015 [2]天地(常州)自动化股份有限公司,江苏常州213015

出　　处：《煤矿机械》2024年第9期160-163,共4页Coal Mine Machinery

基　　金：天地科技股份有限公司科技创新创业资金专项项目(2023-TDZD001-006)。

摘　　要：为解决采用谐振接地系统的煤矿电网在发生单相接地故障后难以正确选择故障线路的问题,提出了一种基于故障后暂态信息和聚类分析的故障选线方法。首先计算故障后各线路暂态零序电流的12种时域特征和5种频域特征来得到故障特征向量,接着将各线路故障特征向量进行归一化处理并添加辅助向量,最后通过聚类分析筛选出故障线路。该方法实现简单,适用性强,可以正确识别母线故障。仿真分析结果验证了该方法的有效性。In order to solve the problem that it is difficult to correctly select the fault line after the single phase grounding fault occurs in the coal mine power grid with the resonant grounding system,proposed a fault line selection method based on post-fault transient information and cluster analysis.Firstly,12 kinds of time domain features and 5 kinds of frequency domain features of the transient zero sequence current of each line after the fault were calculated to obtain the fault feature vector.Then the fault feature vector of each line was normalized and the auxiliary vector was added.Finally,the fault line was selected by cluster analysis.This method is simple to implement,has strong applicability and can correctly identify thebusbar fault.The results of simulation analysis verify the effectiveness of this method.

关 键 词：谐振接地系统 煤矿电网 故障选线 聚类分析 时域特征 频域特征 

分 类 号：TD611[矿业工程—矿山机电]