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Compensation of Unbalanced Low-Voltage Grids Using a Photovoltaic Generation System with a Dual Four-Leg, Two-Level Inverter

2022-01-20Artigo científico Acesso aberto
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dc.contributor.authorPires, Vítor Fernão
dc.contributor.authorCordeiro, Armando
dc.contributor.authorFoito, Daniel
dc.contributor.authorPires, Armando José
dc.contributor.authorHao, Chen
dc.contributor.authorMartins, João Francisco
dc.contributor.authorCastro, Rui
dc.contributor.institutionUNINOVA-Instituto de Desenvolvimento de Novas Tecnologias
dc.contributor.institutionCTS - Centro de Tecnologia e Sistemas
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2022-08-03T22:25:20Z
dc.date.available2022-08-03T22:25:20Z
dc.date.issued2022-01-20
dc.descriptionPublisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
dc.description.abstractIn this paper, a grid-connected photovoltaic (PV) generation system is proposed with the purpose of providing support to low-voltage grids, namely through the elimination or attenuation of the grid imbalances. This compensation must consider the load types, which can be either linear or non-linear, and whether the reactive power and current harmonics generated by the non-linear loads need to be compensated in addition to the unbalanced active power. This must be well considered, since the compensation of all aspects requires oversized PV inverters. Thus, the different unbalanced compensation schemes are addressed. Several schemes for the generation of the inverter current references taking into consideration the compensation and load type are presented. For this PV generation system, a dual four-leg, two-level inverter is proposed. It provides full unbalanced compensation owing to the fourth leg of the inverter and also extends the AC voltage, which is important when this compensation is required. To control this inverter, a control scheme for the inverter that considers several compensation factors is proposed. A vector voltage modulator associated with the controller is another aspect that is addressed in the paper. This modulator considers the balance between the DC voltages of the inverters. Several compensation schemes are verified through computational tests. The results validate the effectiveness of the proposed PV generation system.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent25
dc.format.extent9403646
dc.identifier.doi10.3390/electronics11030320
dc.identifier.issn2079-9292
dc.identifier.otherPURE: 42588805
dc.identifier.otherPURE UUID: ae42065f-217b-45d8-badf-7065694a9278
dc.identifier.otherScopus: 85122951642
dc.identifier.otherWOS: 000759997400001
dc.identifier.urihttp://hdl.handle.net/10362/142836
dc.identifier.urlhttps://www.scopus.com/pages/publications/85122951642
dc.language.isoeng
dc.peerreviewedyes
dc.relationFunding Information: info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50021%2F2020/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00066%2F2020/PT
dc.relationCentre of Technology and Systems
dc.subjectDual inverter
dc.subjectGrid support
dc.subjectLow-voltage grid
dc.subjectMultilevel inverter
dc.subjectPhotovoltaic system (PV)
dc.subjectUnbalanced load
dc.subjectControl and Systems Engineering
dc.subjectSignal Processing
dc.subjectHardware and Architecture
dc.subjectComputer Networks and Communications
dc.subjectElectrical and Electronic Engineering
dc.subjectSDG 7 - Affordable and Clean Energy
dc.titleCompensation of Unbalanced Low-Voltage Grids Using a Photovoltaic Generation System with a Dual Four-Leg, Two-Level Inverteren
dc.typejournal article
degois.publication.issue3
degois.publication.titleElectronics (Switzerland)
degois.publication.volume11
dspace.entity.typePublication
oaire.awardNumberUIDB/00066/2020
oaire.awardTitleCentre of Technology and Systems
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00066%2F2020/PT
oaire.fundingStream6817 - DCRRNI ID
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublication779ae807-14a4-4e58-87e2-6dd81eb7a030
relation.isProjectOfPublication.latestForDiscovery779ae807-14a4-4e58-87e2-6dd81eb7a030

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