{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T03:38:42Z","timestamp":1777520322042,"version":"3.51.4"},"reference-count":34,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,1,27]],"date-time":"2023-01-27T00:00:00Z","timestamp":1674777600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>Due to the limitation of frequency resolution and the spectrum leakage caused by signal windowing, the spectrums of harmonic and interharmonic components with close frequencies overlap each other. When the dense interharmonic (DI) components are close to the harmonic spectrum peaks, the harmonic phasor estimation accuracy is seriously reduced. To address this problem, a harmonic phasor estimation method considering DI interference is proposed in this paper. Firstly, based on the spectral characteristics of the dense frequency signal, the phase and amplitude characteristics are used to determine whether DI interference exists in the signal. Secondly, an autoregressive model is established by using the autocorrelation of the signal. Data extrapolation is performed on the basis of the sampling sequence to improve the frequency resolution and eliminate the interharmonic interference. Finally, the estimated values of harmonic phasor, frequency and rate of change of frequency are obtained. The simulation and some experimental results demonstrate that the proposed method can accurately estimate the parameters of harmonic phasors when DIs exist in the signal, and has a certain anti-noise capability and dynamic performance.<\/jats:p>","DOI":"10.3390\/e25020236","type":"journal-article","created":{"date-parts":[[2023,1,30]],"date-time":"2023-01-30T03:56:27Z","timestamp":1675050987000},"page":"236","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Harmonic Phasor Estimation Method Considering Dense Interharmonic Interference"],"prefix":"10.3390","volume":"25","author":[{"given":"Xianyong","family":"Xiao","sequence":"first","affiliation":[{"name":"The College of Electrical Engineering, Sichuan University, Chengdu 610065, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4487-4263","authenticated-orcid":false,"given":"Runze","family":"Zhou","sequence":"additional","affiliation":[{"name":"The College of Electrical Engineering, Sichuan University, Chengdu 610065, China"}]},{"given":"Xiaoyang","family":"Ma","sequence":"additional","affiliation":[{"name":"The College of Electrical Engineering, Sichuan University, Chengdu 610065, China"}]},{"given":"Rui","family":"Xu","sequence":"additional","affiliation":[{"name":"The College of Electrical Engineering, Sichuan University, Chengdu 610065, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3986","DOI":"10.1109\/TIA.2015.2417123","article-title":"An Electronically Isolated 12-Pulse Autotransformer Rectification Scheme to Improve Input Power Factor and Lower Harmonic Distortion in Variable-Frequency Drives","volume":"51","author":"Swamy","year":"2015","journal-title":"IEEE Trans. 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