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Dual three-phase four-leg multilevel inverter with backstepping prediction for unbalanced low-voltage grids

2025Artigo científico Acesso restrito
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
dc.contributor.authorMonteiro, Joaquim
dc.contributor.authorPires, V. Fernão
dc.contributor.authorCordeiro, Armando
dc.contributor.authorPinto, Sónia
dc.contributor.authorSilva, José Fernando
dc.contributor.authorMonteiro, Joaquim
dc.contributor.authorCordeiro, Armando
dc.date.accessioned2026-09-24T10:48:46Z
dc.date.available2026-09-24T10:48:46Z
dc.date.issued2025
dc.description.abstractWind and solar renewable energy sources (RES) have been fundamental in reducing carbon emissions in electrical energy systems. However, when integrated into low voltage grids, some problems can arise due to the high number of single-phase loads. This situation often leads to unbalanced loads, which can result in increased losses or even under- or over-voltages in one of the phases. This issue is even more critical in the context of isolated microgrids. Therefore, this paper introduces a novel control system for a grid-connected photovoltaic (PV) generation with storage setup based on a dual three-phase four-leg multilevel inverter. This power converter topology, comprising two four-leg two-level three-phase inverters, connects two PV arrays to a three-phase transformer with four wires which in turn connects to a grid. This arrangement is designed to inject PV-generated power into the low voltage (LV) grid, providing support for unbalanced loads. A new backstepping method including the delay simplified dynamics is derived to estimate the optimum converter voltage and near optimum vector to control the load currents, while balancing the capacitor DC voltages. As only one voltage estimate is needed, a fast controller is obtained even if the converter has a high number of voltage vectors. The backstepping method increases the speed of choosing the converter vector, allowing the control of the grid currents injected under both balanced and unbalanced conditions, while also maintaining balance of the capacitor DC voltages in RES. Experimental tests were conducted using a laboratory prototype to evaluate the backstepping performance applied to the proposed PV generation system.eng
dc.identifier.citationMonteiro, J., Fernão Pires, V., Cordeiro, A., Silva, J. F., & Pinto, S. (2025). Dual three-phase four-leg multilevel inverter with backstepping prediction for unbalanced low-voltage grids. IEEE Transactions on Industry Applications, 61(4), 6535-6546. https://doi.org/10.1109/TIA.2025.3546580
dc.identifier.doi10.1109/TIA.2025.3546580
dc.identifier.eissn1939-9367
dc.identifier.urihttp://hdl.handle.net/10400.21/23189
dc.language.isoeng
dc.peerreviewedyes
dc.publisherIEEE
dc.relation.hasversionhttps://ieeexplore.ieee.org/document/10907900
dc.rights.uriN/A
dc.subjectDual inverter
dc.subjectMultilevel inverter
dc.subjectFour-leg twolevel inverter
dc.subjectPhotovoltaic system (PV)
dc.subjectBackstepping prediction
dc.titleDual three-phase four-leg multilevel inverter with backstepping prediction for unbalanced low-voltage gridseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage6546
oaire.citation.issue4
oaire.citation.startPage6535
oaire.citation.titleIEEE Transactions on Industry Applications
oaire.citation.volume61
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMonteiro
person.familyNameCordeiro
person.givenNameJoaquim
person.givenNameArmando
person.identifier1017446
person.identifier2692732
person.identifier.ciencia-id4916-EA4B-17D4
person.identifier.ciencia-idEE1F-34B0-4A02
person.identifier.orcid0000-0003-1930-9123
person.identifier.orcid0000-0001-6658-5783
person.identifier.ridJ-8903-2013
person.identifier.scopus-author-id56582664700
relation.isAuthorOfPublicationaf7c0e5b-adc6-467f-b817-97fbf260f102
relation.isAuthorOfPublicationcb166065-fd85-42f7-88b5-a835226f38a1
relation.isAuthorOfPublication.latestForDiscoveryaf7c0e5b-adc6-467f-b817-97fbf260f102

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ISEL - Eng. Electrotécn. - Comunicações