More-stable EPLL

Saeed Golestan; Jose Matas; Abdullah M. Abusorrah; Josep M. Guerrero

doi:10.1109/TPEL.2021.3099839

More-stable EPLL

Saeed Golestan, Jose Matas, Abdullah M. Abusorrah, Josep M. Guerrero

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

18 Citations (Scopus)

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Abstract

The enhanced phase-locked loop (EPLL) is one of the most famous PLLs in single-phase applications and a versatile tool for different signal processing applications, especially for the grid synchronization of power converters. Recently, it has been proved that the EPLL has a quite narrow stable zone (compared to its unstable zone) in the positive parameter space from a small-signal point of view. This zone will be even more narrow if maintaining a minimum stability margin is required. This article aims to modify the EPLL structure to improve its stability margin, and at the same time, make it unconditionally stable in the positive parameter space from a small-signal point of view.

Original language	English
Journal	IEEE Transactions on Power Electronics
Volume	37
Issue number	1
Pages (from-to)	1003-1011
Number of pages	9
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2021.3099839
Publication status	Published - Jan 2022

Bibliographical note

Publisher Copyright:
IEEE

Keywords

Band-pass filters
Enhanced phase-locked loop (EPLL)
Estimation
Harmonic analysis
Phase locked loops
Power system stability
singlephase systems
Stability criteria
Synchronization
synchronization

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10.1109/TPEL.2021.3099839

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abstract = "The enhanced phase-locked loop (EPLL) is one of the most famous PLLs in single-phase applications and a versatile tool for different signal processing applications, especially for the grid synchronization of power converters. Recently, it has been proved that the EPLL has a quite narrow stable zone (compared to its unstable zone) in the positive parameter space from a small-signal point of view. This zone will be even more narrow if maintaining a minimum stability margin is required. This article aims to modify the EPLL structure to improve its stability margin, and at the same time, make it unconditionally stable in the positive parameter space from a small-signal point of view.",

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AU - Abusorrah, Abdullah M.

AU - Guerrero, Josep M.

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KW - Band-pass filters

KW - Enhanced phase-locked loop (EPLL)

KW - Estimation

KW - Harmonic analysis

KW - Phase locked loops

KW - Power system stability

KW - singlephase systems

KW - Stability criteria

KW - Synchronization

KW - synchronization

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More-stable EPLL

Abstract

Bibliographical note

Keywords

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