Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy

Performance degradation is, in general, regarded as a power quality problem. One solution to recover grid performance is through the application of a unified power quality conditioner (UPQC). Although these devices are multi-input/multi-output (MIMO) systems, the most common control strategies consi...

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Autores principales:	Holman Bueno-Contreras, Germán Andrés Ramos, Ramon Costa-Castelló
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	resonant extended state observer power quality resonant control power factor correction UPQC Technology T
Acceso en línea:	https://doaj.org/article/40dcbed68d6b4527854be6b76962b45a
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spelling	oai:doaj.org-article:40dcbed68d6b4527854be6b76962b45a2021-11-11T15:46:03ZPower Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy10.3390/en142169381996-1073https://doaj.org/article/40dcbed68d6b4527854be6b76962b45a2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6938https://doaj.org/toc/1996-1073Performance degradation is, in general, regarded as a power quality problem. One solution to recover grid performance is through the application of a unified power quality conditioner (UPQC). Although these devices are multi-input/multi-output (MIMO) systems, the most common control strategies consist of two decoupled controllers, which neglect the coupling effects and add uncertainty to the system. For this reason, this paper proposes a multivariable resonant observer-based control strategy of a UPQC system. This method includes all significant coupling effects between this system and the grid. This strategy results in a stability-based compensator, which differs from recently proposed strategies that are based on signal calculation and cannot assure closed-loop stability. In addition, this paper introduces a simplified controller tuning strategy based on optimal conventional methods without losing closed-loop performance. It implies that the controller can be easily tuned, despite the complexity of the MIMO dynamic model. The UPQC with the resonant observer is verified on an experimental setup for a single-phase system, obtaining three relevant results for power quality improvement: (1) harmonics compensation tested with a total harmonic distortion limit of 5%; (2) sags and swells mitigation; and (3) power factor correction, achieving a unitary value on the grid side.Holman Bueno-ContrerasGermán Andrés RamosRamon Costa-CastellóMDPI AGarticleresonant extended state observerpower qualityresonant controlpower factor correctionUPQCTechnologyTENEnergies, Vol 14, Iss 6938, p 6938 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	resonant extended state observer power quality resonant control power factor correction UPQC Technology T
spellingShingle	resonant extended state observer power quality resonant control power factor correction UPQC Technology T Holman Bueno-Contreras Germán Andrés Ramos Ramon Costa-Castelló Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy
description	Performance degradation is, in general, regarded as a power quality problem. One solution to recover grid performance is through the application of a unified power quality conditioner (UPQC). Although these devices are multi-input/multi-output (MIMO) systems, the most common control strategies consist of two decoupled controllers, which neglect the coupling effects and add uncertainty to the system. For this reason, this paper proposes a multivariable resonant observer-based control strategy of a UPQC system. This method includes all significant coupling effects between this system and the grid. This strategy results in a stability-based compensator, which differs from recently proposed strategies that are based on signal calculation and cannot assure closed-loop stability. In addition, this paper introduces a simplified controller tuning strategy based on optimal conventional methods without losing closed-loop performance. It implies that the controller can be easily tuned, despite the complexity of the MIMO dynamic model. The UPQC with the resonant observer is verified on an experimental setup for a single-phase system, obtaining three relevant results for power quality improvement: (1) harmonics compensation tested with a total harmonic distortion limit of 5%; (2) sags and swells mitigation; and (3) power factor correction, achieving a unitary value on the grid side.
format	article
author	Holman Bueno-Contreras Germán Andrés Ramos Ramon Costa-Castelló
author_facet	Holman Bueno-Contreras Germán Andrés Ramos Ramon Costa-Castelló
author_sort	Holman Bueno-Contreras
title	Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy
title_short	Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy
title_full	Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy
title_fullStr	Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy
title_full_unstemmed	Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy
title_sort	power quality improvement through a upqc and a resonant observer-based mimo control strategy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/40dcbed68d6b4527854be6b76962b45a
work_keys_str_mv	AT holmanbuenocontreras powerqualityimprovementthroughaupqcandaresonantobserverbasedmimocontrolstrategy AT germanandresramos powerqualityimprovementthroughaupqcandaresonantobserverbasedmimocontrolstrategy AT ramoncostacastello powerqualityimprovementthroughaupqcandaresonantobserverbasedmimocontrolstrategy
_version_	1718434079900172288

Power Quality Improvement through a UPQC and a Resonant Observer-Based MIMO Control Strategy

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