电测与仪表2026，Vol.63Issue(4)：191-200,10.DOI:10.19753/j.issn1001-1390.2026.04.020
智能电能表表前工频阻抗异常辨识方法及适用性分析研究
Research on identification method and applicability analysis of power frequency impedance anomalies in front of smart electricity meter
摘要
Abstract
To accurately detect abnormal conditions of the power frequency impedance in front of smart electricity meters on low-voltage lines,it is necessary to conduct an in-depth analysis of the feasibility and adaptability of ex-isting identification methods.Firstly,based on the single-phase loop impedance model of the low-voltage distribu-tion network,this paper elaborates on the calculation principles and implementation steps of the loop impedance method,impedance parameter estimation method,and neighbor meter voltage impedance method.Then,a single-phase multi-user electricity experiment platform is constructed to collect electricity meter voltage and current data under different states of the meter front line(switch).Finally,the feasibility and adaptability of the three identifi-cation methods are evaluated based on experimental data and actual electricity meter data from the distribution area.The study shows that the loop impedance method is only suitable for systems with relatively small loop impedance,requiring the load of the downstream meters to remain unchanged between two measurement instances,which is quite demanding on the data.The impedance parameter estimation method is not affected by system impedance,but its identification results depend on the size and variation of its own load,with a significant deviation between the es-timated value and actual value.The neighbor meter voltage impedance method is simple and easy to implement,has a wide range of applications,requires less data,and has a low false positive rate,but is only applicable to sce-narios with multiple meter positions.关键词
智能电能表/工频阻抗/异常阻抗辨识/回路阻抗法/阻抗参数估计法/邻表电压阻抗法Key words
smart electricity meter/power frequency impedance/abnormal impedance identification/loop imped-ance method/impedance parameter estimation method/neighbor meter voltage impedance method分类
信息技术与安全科学引用本文复制引用
林华,詹文,高琛,高伟..智能电能表表前工频阻抗异常辨识方法及适用性分析研究[J].电测与仪表,2026,63(4):191-200,10.基金项目
国网福建省电力有限公司科技项目(52130X230002) （52130X230002）
