A Novel Solid-State Transformer with Improved Flyback Converter Equipped with Quasi Z-Source Converter for Medium-Voltage Utility Grid

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dc.authoridSavrun, Murat Mustafa/0000-0001-5847-5082
dc.contributor.authorCuma, Mehmet Ugras
dc.contributor.authorAnvari, Alireze Deljavan
dc.contributor.authorSavrun, Murat Mustafa
dc.date.accessioned2025-01-06T17:44:25Z
dc.date.available2025-01-06T17:44:25Z
dc.date.issued2023
dc.description.abstractThis paper introduces an enhanced solid-state transformer topology for a medium-voltage (MV) utility grid. The main objective of the current study is to develop an improved flyback converter equipped with a quasi z-source converter (qZ_iFC) having a high-voltage conversion capability for the integration of low-input voltage to the DC link of an MV modular multilevel converter (MMC). The system integrates the quasi z-source and flyback converters by operating their existing switches complementary. Furthermore, the high-gain qZ_iFC allows for a reduction in the rated voltage of the input, as well as the use of a high-frequency transformer (HFT) with a unity turns ratio that provides galvanic isolation between the input and the output ports. Thus, using an HFT just for isolation purposes without voltage gain improves the system efficiency. In addition, a controller for (i) qZ_iFC which is regulating complementary switches to prevent the shoot-through current from reaching the HFT resulting in saturation; and (ii) a controller for MMC to produce MV-level AC voltage for loads are suggested. The performance of the proposed system was evaluated for several operating conditions. Results show that the proposed SST smoothly performs the power flow between the ports during steady-state and transient conditions. The power flow capabilities and efficiency values validate the viability and effectiveness of the proposed system.
dc.description.sponsorshipScientific Project Unit of Adana Alparslan Turkes Science and Technology University [21103002]; Transformator Elektromekanik Inc. RD Center
dc.description.sponsorshipThis research was funded by Transformator Elektromekanik Inc. R & D Center. Also, this research was funded by the Scientific Project Unit of Adana Alparslan Turkes Science and Technology University, grant number 21103002.
dc.identifier.doi10.3390/en16062687
dc.identifier.issn1996-1073
dc.identifier.issue6
dc.identifier.scopus2-s2.0-85151919315
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.3390/en16062687
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3048
dc.identifier.volume16
dc.identifier.wosWOS:000958235800001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofEnergies
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectsolid-state transformer
dc.subjectflyback converter
dc.subjectquasi z-source
dc.subjecthigh gain
dc.subjectmedium-voltage utility
dc.titleA Novel Solid-State Transformer with Improved Flyback Converter Equipped with Quasi Z-Source Converter for Medium-Voltage Utility Grid
dc.typeArticle

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