全球能源互联网2024，Vol.7Issue(6)：738-750,13.DOI:10.19705/j.cnki.issn2096-5125.2024.06.013
考虑相量量测单元数据不同步的双端输电线路正序以及零序参数辨识方法
Identification of Positive Sequence and Zero Sequence Parameters of Double-ended Transmission Lines Considering Phasor Measurement Unit Data Asynchrony
摘要
Abstract
Regarding the problem that the phase measurement unit(PMU)data are not synchronized,which leads to significant mistakes in the parameter identification results.Considering the PMU data are not synchronized,this paper proposes a method to identify the positive sequence and zero sequence parameters of transmission lines.Firstly,the applicability range of the centralized and distributed parameter models of the line at certain voltage levels is analyzed.Then,based on the centralized parameter model of the line,using the power and voltage information at both ends of the line obtained by the PMU device under normal operation,a nonlinear equation is constructed with the positive sequence parameters and the asynchronous angle as unknown quantities,and the Levenberg-Marquardt(L-M)algorithm is applied to solve the positive sequence parameters and the asynchronous angle.Secondly,based on the identification of the positive sequence parameters and the unsynchronized angle,the positive sequence,negative sequence and zero sequence equivalent circuit diagrams of the single-phase ground fault are analyzed,and the fault distance is solved by the positive sequence and negative sequence networks.When the fault distance is known,the zero sequence parameter acts as the unknown quantity in an equation built using the zero sequence network,which is then solved using the L-M algorithm.Finally,using MATLAB software to build a single-return double-ended transmission line system,the proposed positive-sequence and zero-sequence parameter identification methods are simulated,and the effectiveness and accuracy of the proposed parameter identification methods are verified.关键词
相量量测单元/数据不同步/集中参数模型/正序参数/零序参数/L-M算法Key words
phasor measurement unit/data asynchrony/centralized parameter model/positive-sequence parameters/zero-sequence parameters/L-M algorithm分类
信息技术与安全科学引用本文复制引用
杨广杰,卜明新,陈伟刚,姜艳丰,周宁,陈晓龙..考虑相量量测单元数据不同步的双端输电线路正序以及零序参数辨识方法[J].全球能源互联网,2024,7(6):738-750,13.基金项目
国网河北省电力有限公司科技项目(基于量测数据的交流输电线路参数辨识方法研究,B704HD220162).Science and Technology Project of State Grid Hebei Electric Power Co.,Ltd.(Research on parameter identification for AC transmission line based on measurement data,B704HD220162). （基于量测数据的交流输电线路参数辨识方法研究,B704HD220162）
