基于EMD距离和Grubbs准则的煤矿电网选线  

Coal Mine Power Grid Line Selection Based on EMD Distance and Grubbs Criterion

作　　者：程卫健 CHENG Weijian(CCTEG Changzhou Research Institute,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：《电工技术》2023年第11期34-36,共3页Electric Engineering

摘　　要：针对煤矿电网发生单相接地故障时难以正确选线的问题,提出一种基于EMD距离(Earth Mover′s Distance)和Grubbs准则的煤矿电网选线。故障发生后两两计算各馈线零序电流波形间的EMD距离,从而得到综合EMD距离矩阵。基于Grubbs准则筛选出综合EMD距离矩阵中的异常值,其对应线路即为故障线路。仿真分析证明,所提算法准确性不受故障线路、故障位置、故障合闸角及接地电阻等因素的影响,具有较高的准确性和较强的适用性。It is difficult to correctly select the line when a single-phase ground fault occurs in the coal mine power grid.Aiming at this problem,a line selection method based on EMD distance(Earth Mover′s Distance)and Grubbs criterion is proposed.After the fault occurs,the EMD distance between the zero-sequence current waveforms of each feeder is calculated in pairs,so as to obtain a comprehensive EMD distance matrix.Based on the Grubbs criterion,the outliers in the comprehensive EMD distance matrix are screened,and the corresponding lines are fault lines.Simulation analysis shows that the accuracy of the proposed algorithm is not affected by the factors of fault line,fault location,fault closing angle and grounding resistance.The proposed algorithm has high accuracy and strong applicability.

关 键 词：煤矿电网 单相接地故障 选线 EMD距离 Grubbs准则 

分 类 号：TD611[矿业工程—矿山机电]