基于最小二乘的低压漏电系统选漏与区段定位  

Line Selection and Fault Section Location Based on Least Squares in Low-Voltage Leakage System

作　　者：付润滋 张文龙[2] 孙鹏 韩宪明 吴佩伦 FU Runzi;ZHANG Wenlong;SUN Peng;HAN Xianming;WU Peilun(Jining No.3 Coal Mine,Yankuang Energy Group Co.,Ltd.,Jining,Shandong 272000,China;College of Marine Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]兖矿能源集团股份有限公司济宁三号煤矿,山东济宁272000 [2]山东科技大学海洋科学与工程学院,山东青岛266590

出　　处：《自动化应用》2024年第18期57-61,共5页Automation Application

摘　　要：针对现有低压供电系统单相漏电故障选线与测距问题,提出一种基于最小二乘算法的单相漏电故障选漏与区间定位方法。该方法通过建立最小二乘数学模型,将各支路各区段采集的零序电流代入最小二乘算法,求解得到各区段对地分布电容与对地绝缘电阻序列,并对对地分布电容与对地绝缘电阻序列求平均值,根据对地分布电容与对地绝缘电阻平均值的极性来进行选线与区段定位。利用MATLAB/Simulink搭建仿真模型,并进行多次实验与最小二乘算法求解。结果表明,该方法在低压单相漏电选线与区段定位方面具有较高的可靠性。Aiming at the existing single-phase leakage fault line selection and fault section location in mine low-voltage power supply system,a scheme of single-phase earth leakage line selection and fault section location was proposed which was based on the least squares algorithm.In the scheme,firstly,to establish a mathematical model of least squares,and then to plug collected zero sequence current in each branch section into the least squares algorithm to get distributed capacitance sequence and insulation resistance sequence of different sections,and then to average distributed capacitance sequence and insulation resistance sequence,finaly,to select fault line and locat fault section on the basis of the polarity of the distributed capacitance average and insulation resistance average.The simulation model is built by MATLAB/Simulink and solved by several experiments and least squares algorithm.The results show that this method has high reliability in low voltage single-phase leakage line selection and section location.

关 键 词：单相漏电故障 最小二乘 对地分布电容 对地绝缘电阻 

分 类 号：TM862[电气工程—高电压与绝缘技术]