Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer

This paper proposes a new method for the simultaneous determination of the optimal control parameters of proportional resonant controllers and the optimal design of the output filter of a grid-tied three-phase inverter. The proposed method, based on the grey wolf optimization (GWO) algorithm, addres...

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Main Authors: João Faria, João Fermeiro, José Pombo, Maria Calado, Sílvio Mariano
Format: Article
Language:English
Published: MDPI AG 2020-04-01
Series:Energies
Subjects:
Online Access:https://www.mdpi.com/1996-1073/13/8/1923
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author João Faria
João Fermeiro
José Pombo
Maria Calado
Sílvio Mariano
author_facet João Faria
João Fermeiro
José Pombo
Maria Calado
Sílvio Mariano
author_sort João Faria
collection DOAJ
description This paper proposes a new method for the simultaneous determination of the optimal control parameters of proportional resonant controllers and the optimal design of the output filter of a grid-tied three-phase inverter. The proposed method, based on the grey wolf optimization (GWO) algorithm, addresses both optimization problems as a single process to achieve a better system frequency response. It optimizes the unknown parameters by using a fitness function to find the best trade-off between the following fundamental terms: the harmonic attenuation rate; the power loss, through the damping resistor; and the current tracking error in the stationary frame, ensuring the system and grid stability. To validate the proposed optimization methodology, two case studies are considered with different output filter topologies with passive damping methods. The results obtained from the proposed optimization procedure were analyzed and discussed according to the fitness function terms.
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spelling doaj.art-c4050ee758174aacb8ccac6d814292e62023-11-19T21:34:37ZengMDPI AGEnergies1996-10732020-04-01138192310.3390/en13081923Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf OptimizerJoão Faria0João Fermeiro1José Pombo2Maria Calado3Sílvio Mariano4Instituto de Telecomunicações, Universidade da Beira Interior, Covilhã 6201-001, PortugalInstituto de Telecomunicações, Universidade da Beira Interior, Covilhã 6201-001, PortugalInstituto de Telecomunicações, Universidade da Beira Interior, Covilhã 6201-001, PortugalInstituto de Telecomunicações, Universidade da Beira Interior, Covilhã 6201-001, PortugalInstituto de Telecomunicações, Universidade da Beira Interior, Covilhã 6201-001, PortugalThis paper proposes a new method for the simultaneous determination of the optimal control parameters of proportional resonant controllers and the optimal design of the output filter of a grid-tied three-phase inverter. The proposed method, based on the grey wolf optimization (GWO) algorithm, addresses both optimization problems as a single process to achieve a better system frequency response. It optimizes the unknown parameters by using a fitness function to find the best trade-off between the following fundamental terms: the harmonic attenuation rate; the power loss, through the damping resistor; and the current tracking error in the stationary frame, ensuring the system and grid stability. To validate the proposed optimization methodology, two case studies are considered with different output filter topologies with passive damping methods. The results obtained from the proposed optimization procedure were analyzed and discussed according to the fitness function terms.https://www.mdpi.com/1996-1073/13/8/1923grid-tied invertergrey wolf optimizerPR controllersLCL filterpassive damping
spellingShingle João Faria
João Fermeiro
José Pombo
Maria Calado
Sílvio Mariano
Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer
Energies
grid-tied inverter
grey wolf optimizer
PR controllers
LCL filter
passive damping
title Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer
title_full Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer
title_fullStr Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer
title_full_unstemmed Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer
title_short Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer
title_sort proportional resonant current control and output filter design optimization for grid tied inverters using grey wolf optimizer
topic grid-tied inverter
grey wolf optimizer
PR controllers
LCL filter
passive damping
url https://www.mdpi.com/1996-1073/13/8/1923
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