Design of a Multifrequency Signal Parameter Estimation Method for the Distribution Network Based on HIpST

作     者：Bin Liu Shuai Liang Renjie Ding Shuguang Li 

作者机构：Tongliao Power Supply CompanyState Grid East Inner Mongolia Electric Power Co.Ltd.Tongliao028000China School of Electrical EngineeringNortheast Electric Power UniversityJilin132012China 

出 版 物：《Energy Engineering》 (能源工程（英文）)

年 卷 期：2024年第121卷第3期

页      面：729-746页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：supported by the State Grid Corporation of China Headquarters Management Science and Technology Project(No.526620200008) 

主　　题：Discrete fourier transform taylor series hilbert transform multifrequency signal parameter estimation 

摘      要：The application of traditional synchronous measurement methods is limited by frequent fluctuations of electrical signals and complex frequency components in distribution ***,it is critical to find solutions to the issues of multifrequency parameter estimation and synchronous measurement estimation accuracy in the complex environment of distribution *** utilizing the multifrequency sensing capabilities of discrete Fourier transform signals and Taylor series for dynamic signal processing,a multifrequency signal estimation approach based on HT-IpDFT-STWLS(HIpST)for distribution networks is ***,by introducing the Hilbert transform(HT),the influence of noise on the estimation algorithm is ***,signal frequency components are obtained on the basis of the calculated signal envelope spectrum,and the interpolated discrete Fourier transform(IpDFT)frequency coarse estimation results are used as the initial values of symmetric Taylor weighted least squares(STWLS)to achieve high-precision parameter estimation under the dynamic changes of the signal,and the method increases the number of discrete ***,the accuracy of this proposed method is verified by simulation *** show that this proposed method can accurately achieve the parameter estimation of multifrequency signals in distribution *** approach provides a solution for the application of phasor measurement units in distribution networks.