A discrete-time frequency-locked loop for single-phase grid synchronization under harmonic distortion
A discrete-time frequency-locked loop for single-phase grid synchronization under harmonic distortion
This article presents a discrete-time frequency-locked-loop (FLL) scheme that estimates the in-phase fundamental component of a distorted single-phase reference signal and its fundamental angular frequency. The proposed scheme also estimates the square-phase fundamental component as a set of orthogonal signals. The proposed design is based on an exact discrete model of a single-phase signal generator. It is shown that the proposed method provides an accurate response even under low sampling frequency. The proposed scheme includes, as a plug-in block, an explicit harmonic compensation mechanism to reduce the effect of harmonic distortion. The article includes a local stability analysis for the proposed scheme as well as guidelines for control parameter tuning. Experimental results are provided to assess the performance of the proposed scheme under angular frequency variations and harmonic distortion on the reference signal.
Frequency-locked loop (FLL), grid synchronization, harmonic distortion
4647-4657
Escobar, Gerardo
9d5b1954-920f-46b6-83a3-fc61eed024f2
Puerto-Flores, Dunstano Del
1025cf43-667e-4d1b-9b20-3b93918c1276
Mayo-Maldonado, Jonathan C.
c7321b60-3130-43f4-89f4-f12ac5b2f822
Valdez-Resendiz, Jesus E.
b3ae7403-50bb-4b32-a7bf-d2d4646a5293
Micheloud-Vernackt, Osvaldo Miguel
386f7599-1cb8-4fa5-8161-ac68ed7e9483
May 2020
Escobar, Gerardo
9d5b1954-920f-46b6-83a3-fc61eed024f2
Puerto-Flores, Dunstano Del
1025cf43-667e-4d1b-9b20-3b93918c1276
Mayo-Maldonado, Jonathan C.
c7321b60-3130-43f4-89f4-f12ac5b2f822
Valdez-Resendiz, Jesus E.
b3ae7403-50bb-4b32-a7bf-d2d4646a5293
Micheloud-Vernackt, Osvaldo Miguel
386f7599-1cb8-4fa5-8161-ac68ed7e9483
Escobar, Gerardo, Puerto-Flores, Dunstano Del, Mayo-Maldonado, Jonathan C., Valdez-Resendiz, Jesus E. and Micheloud-Vernackt, Osvaldo Miguel
(2020)
A discrete-time frequency-locked loop for single-phase grid synchronization under harmonic distortion.
IEEE Transactions on Power Electronics, 35 (5), , [8846083].
(doi:10.1109/TPEL.2019.2942910).
Abstract
This article presents a discrete-time frequency-locked-loop (FLL) scheme that estimates the in-phase fundamental component of a distorted single-phase reference signal and its fundamental angular frequency. The proposed scheme also estimates the square-phase fundamental component as a set of orthogonal signals. The proposed design is based on an exact discrete model of a single-phase signal generator. It is shown that the proposed method provides an accurate response even under low sampling frequency. The proposed scheme includes, as a plug-in block, an explicit harmonic compensation mechanism to reduce the effect of harmonic distortion. The article includes a local stability analysis for the proposed scheme as well as guidelines for control parameter tuning. Experimental results are provided to assess the performance of the proposed scheme under angular frequency variations and harmonic distortion on the reference signal.
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Published date: May 2020
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Publisher Copyright:
© 1986-2012 IEEE.
Keywords:
Frequency-locked loop (FLL), grid synchronization, harmonic distortion
Identifiers
Local EPrints ID: 503440
URI: http://eprints.soton.ac.uk/id/eprint/503440
ISSN: 0885-8993
PURE UUID: 4b6a597c-452c-4355-89c4-6d611aa18349
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Date deposited: 31 Jul 2025 16:56
Last modified: 01 Aug 2025 02:18
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Contributors
Author:
Gerardo Escobar
Author:
Dunstano Del Puerto-Flores
Author:
Jonathan C. Mayo-Maldonado
Author:
Jesus E. Valdez-Resendiz
Author:
Osvaldo Miguel Micheloud-Vernackt
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