Wavelet-Based Frequency Tracking Monitor Applied for Low-Inertia AC Microgrids

Samara De Cavalcante Paiva; Ricardo Lucio De Araujo Ribeiro; Denis Keuton Alves; Josep M. Guerrero; Thiago De Oliveira Alves Rocha; Flavio Bezerra Costa

doi:10.1109/TPEL.2020.3034585

Wavelet-Based Frequency Tracking Monitor Applied for Low-Inertia AC Microgrids

Samara De Cavalcante Paiva, Ricardo Lucio De Araujo Ribeiro, Denis Keuton Alves, Josep M. Guerrero, Thiago De Oliveira Alves Rocha, Flavio Bezerra Costa

Research output: Contribution to journal › Journal article › Research › peer-review

9 Citations (Scopus)

Abstract

This article proposes a wavelet-based frequency tracking monitor (WB-FTM) applied for low-voltage ac microgrids. It is based on a modified continuous wavelet transform (CWT) algorithm that makes it feasible for real-time applications (RT-CWT). The WB-FTM provides the frequency estimation through the point of common coupling voltage measurements and can be employed in single-phase or three-phase microgrids. Also, this estimation approach overcomes the main drawbacks of the standard techniques presented in the literature. The effectiveness of the WB-FTM was evaluated in comparison with the discrete Fourier transform, augmented complex least mean square, and second-order generalized integrator based on a frequency-locked loop based standard frequency estimation methods. Experimental results obtained from an ac microgrid laboratory setup, under different operational scenarios, demonstrated that WB-FTM overcomes conventional estimators' limitations, with faster convergence time, which is essential for frequency restoration systems applied for low-inertia ac microgrids.

Original language	English
Article number	9244623
Journal	IEEE Transactions on Power Electronics
Volume	36
Issue number	6
Pages (from-to)	6674-6684
Number of pages	11
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2020.3034585
Publication status	Published - Jun 2021

Bibliographical note

Funding Information:
Manuscript received May 11, 2020; revised August 8, 2020; accepted October 20, 2020. Date of publication October 29, 2020; date of current version February 5, 2021. This work was supported in part by the Coordination of Superior Level Staff Improvement (CAPES) and in part by the Brazilian National Council for Scientific and Technological Development (CNPq). Recommended for publication by Associate Editor G. De Donato. (Corresponding author: Sâmara de Cavalcante Paiva.) Sâmara de Cavalcante Paiva is with the Federal University of Rio Grande do Norte (UFRN), Natal 59078-970, Brazil, and also with the Rural Federal University of Semi-Árido (UFERSA), Caraúbas 59780-000, Brazil (e-mail: paivasamara@hotmail.com).

Publisher Copyright:
© 1986-2012 IEEE.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

AC microgrid (AC-MG)
continuous wavelet transform (CWT)
distributed generation
frequency estimation

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title = "Wavelet-Based Frequency Tracking Monitor Applied for Low-Inertia AC Microgrids",

abstract = "This article proposes a wavelet-based frequency tracking monitor (WB-FTM) applied for low-voltage ac microgrids. It is based on a modified continuous wavelet transform (CWT) algorithm that makes it feasible for real-time applications (RT-CWT). The WB-FTM provides the frequency estimation through the point of common coupling voltage measurements and can be employed in single-phase or three-phase microgrids. Also, this estimation approach overcomes the main drawbacks of the standard techniques presented in the literature. The effectiveness of the WB-FTM was evaluated in comparison with the discrete Fourier transform, augmented complex least mean square, and second-order generalized integrator based on a frequency-locked loop based standard frequency estimation methods. Experimental results obtained from an ac microgrid laboratory setup, under different operational scenarios, demonstrated that WB-FTM overcomes conventional estimators' limitations, with faster convergence time, which is essential for frequency restoration systems applied for low-inertia ac microgrids.",

keywords = "AC microgrid (AC-MG), continuous wavelet transform (CWT), distributed generation, frequency estimation",

author = "Paiva, {Samara De Cavalcante} and Ribeiro, {Ricardo Lucio De Araujo} and Alves, {Denis Keuton} and Guerrero, {Josep M.} and Rocha, {Thiago De Oliveira Alves} and Costa, {Flavio Bezerra}",

note = "Funding Information: Manuscript received May 11, 2020; revised August 8, 2020; accepted October 20, 2020. Date of publication October 29, 2020; date of current version February 5, 2021. This work was supported in part by the Coordination of Superior Level Staff Improvement (CAPES) and in part by the Brazilian National Council for Scientific and Technological Development (CNPq). Recommended for publication by Associate Editor G. De Donato. (Corresponding author: S{\^a}mara de Cavalcante Paiva.) S{\^a}mara de Cavalcante Paiva is with the Federal University of Rio Grande do Norte (UFRN), Natal 59078-970, Brazil, and also with the Rural Federal University of Semi-{\'A}rido (UFERSA), Cara{\'u}bas 59780-000, Brazil (e-mail: paivasamara@hotmail.com). Publisher Copyright: {\textcopyright} 1986-2012 IEEE. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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AU - Costa, Flavio Bezerra

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N2 - This article proposes a wavelet-based frequency tracking monitor (WB-FTM) applied for low-voltage ac microgrids. It is based on a modified continuous wavelet transform (CWT) algorithm that makes it feasible for real-time applications (RT-CWT). The WB-FTM provides the frequency estimation through the point of common coupling voltage measurements and can be employed in single-phase or three-phase microgrids. Also, this estimation approach overcomes the main drawbacks of the standard techniques presented in the literature. The effectiveness of the WB-FTM was evaluated in comparison with the discrete Fourier transform, augmented complex least mean square, and second-order generalized integrator based on a frequency-locked loop based standard frequency estimation methods. Experimental results obtained from an ac microgrid laboratory setup, under different operational scenarios, demonstrated that WB-FTM overcomes conventional estimators' limitations, with faster convergence time, which is essential for frequency restoration systems applied for low-inertia ac microgrids.

AB - This article proposes a wavelet-based frequency tracking monitor (WB-FTM) applied for low-voltage ac microgrids. It is based on a modified continuous wavelet transform (CWT) algorithm that makes it feasible for real-time applications (RT-CWT). The WB-FTM provides the frequency estimation through the point of common coupling voltage measurements and can be employed in single-phase or three-phase microgrids. Also, this estimation approach overcomes the main drawbacks of the standard techniques presented in the literature. The effectiveness of the WB-FTM was evaluated in comparison with the discrete Fourier transform, augmented complex least mean square, and second-order generalized integrator based on a frequency-locked loop based standard frequency estimation methods. Experimental results obtained from an ac microgrid laboratory setup, under different operational scenarios, demonstrated that WB-FTM overcomes conventional estimators' limitations, with faster convergence time, which is essential for frequency restoration systems applied for low-inertia ac microgrids.

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JF - IEEE Transactions on Power Electronics

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ER -

Wavelet-Based Frequency Tracking Monitor Applied for Low-Inertia AC Microgrids

Abstract

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Keywords

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