基于负荷波动特征量提取和稳健估计的低压配电网回路阻抗辨识方法  

A low voltage distribution network loop impedance identification method based on load fluctuation feature extraction and robust estimation

作　　者：庄小艇 孙蒙恩 赖天德 吴思尧 周庆坚 王辉 ZHUANG Xiaoting;SUN Mengen;LAI Tiande;WU Siyao;ZHOU Qingjian;WANG Hui(State Grid Shenzhen Electric Power Co.,Ltd.,Shenzhen 518000,China;State Grid Electric Power Research Institute,Nanjing 210061,China)

机构地区：[1]深圳供电局有限公司,广东深圳518000 [2]国网电力科学研究院有限公司,江苏南京210061

出　　处：《供用电》2025年第2期29-37,共9页Distribution & Utilization

基　　金：中国南方电网有限责任公司科技项目(090000KK52222164)。

摘　　要：针对传统数据驱动模型下回路阻抗计算精度不足的问题,提出了一种基于瞬时负荷波动特征量提取和稳健估计的回路阻抗辨识方法,依托新一代物联电表具备的高频采集能力,提升了回路阻抗计算模型的抗干扰能力。通过增量电阻法验证了所提回路阻抗计算方法的准确性,在毫欧及十毫欧以上级别的增量法验证中分别取得90%和95%以上的准确度,为后续基于回路阻抗的线路健康度分析提供了理论依据。In response to the problem of insufficient accuracy in loop impedance calculation under traditional data-driven models,this paper proposes a loop impedance identification method based on instantaneous load fluctuation feature extraction and robust estimation.Relying on the high-frequency acquisition capability of the new generation of IOT meters,the anti-interference capability of the circuit impedance calculation model is improved.In this paper,the accuracy of the proposed circuit impedance calculation method is verified by the incremental resistance method,and the accuracy of 90% and 95% in the milliohm and above 10 milliohm level incremental method is obtained,which provides a theoretical basis for the subsequent circuit health analysis based on the circuit impedance.

关 键 词：低压配电网 回路阻抗 瞬时特征量 稳健估计 线路健康度 

分 类 号：TM72[电气工程—电力系统及自动化]