基于线性最小二乘回归和PMU量测的输电线路参数估计分析方法  

Analysis Method of Transmission Line Parameter Estimation Based on Linear Least Squares Regression and PMU Data

作　　者：阎博 曹良晶 李梁 赵晨晓 YAN Bo;CAO Liangjing;LI Liang;ZHAO Chenxiao(State Grid Jibei Electric Power Company,Beijing 100054,China)

机构地区：[1]国网冀北电力有限公司,北京100054

出　　处：《电子器件》2024年第5期1362-1367,共6页Chinese Journal of Electron Devices

基　　金：国网冀北电力有限公司科技项目(SGJB0000TKJS1500046)。

摘　　要：电力系统中的架空输电线路参数经常被用于故障定位保护算法、状态估计以及稳定性分析中,而同步相量测量技术能够在线估测电力系统的传输线路参数。提出了一种简单的基于线性最小二乘回归的线路参数的估测方法,其通过线路两端的相量测量单元的电压和电流数据进行正序线路参数估测。所提出的方法计算简单且不需要进行迭代,同时在两个不同电力系统中的四条不同线路中采集的实际相量数据进行了全面测试。测试结果表明:所提出的线路参数估测方法不仅计算简单,同时可以在不同的线路模型中可以快速准确地估测线路电抗和线路电纳,具有较强的通用性和可扩展性。The parameters of overhead transmission lines in power systems are often used in fault location protection algorithms,state estimation and stability analysis.A simple line parameter estimation method based on linear least square regression is proposed,which estimates the positive sequence line parameters through the voltage and current data of phasor measurement units at both ends of the line.The proposed method is simple in calculation and does not require iteration.At the same time,the actual phasor data collected from four different lines in two different power systems are fully tested.The test results show that the proposed line parameter estimation method not only is simple in calculation,but also can quickly and accurately estimate the line reactance and line susceptance in different line models,with strong universality and scalability.

关 键 词：相量测量单元 同步相量 线路参数估算 正序 

分 类 号：TM744[电气工程—电力系统及自动化]