Five-Port Isolated Bidirectional DC-DC Converter for Interfacing a Hybrid Photovoltaic-Fuel Cell-Battery System with Bipolar DC Microgrids

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dc.authoridEkici, Elanur/0000-0003-1919-5576
dc.authoridSavrun, Murat Mustafa/0000-0001-5847-5082
dc.authoridKoroglu, Tahsin/0000-0002-6587-3529
dc.contributor.authorKoroglu, Tahsin
dc.contributor.authorEkici, Elanur
dc.contributor.authorSavrun, M. Mustafa
dc.date.accessioned2025-01-06T17:37:22Z
dc.date.available2025-01-06T17:37:22Z
dc.date.issued2024
dc.description.abstractThis paper introduces a novel five-port, three-input, dual-output isolated bidirectional dc-dc converter (FPIBC) topology with an effective controller for power-sharing and voltage-balancing in bipolar dc microgrids (BPDCMGs). The proposed converter acts as the interface for the integration of a hybrid generation system comprising a solid oxide fuel cell (SOFC), a photovoltaic (PV) system, and a battery into BPDCMGs. It employs a reduced number of circuit elements compared with similar multiport converter topologies suggested for BPDCMG applications. Symmetrical bipolar output voltages are ensured by a voltage-balancing circuit composed of a fully controlled switch and four diodes. The FPIBC is equipped with different controllers for output voltage regulation and balancing, power sharing, maximum power point tracking of the PV, the optimum operating region of the SOFC, and constant-current, constant-voltage charging of the battery. To verify the viability and effectiveness of the proposed system, a simulation model was developed with a 4.2 kW SOFC, a 3.7 kW PV, and a 140 V 10.8 Ah battery in MATLAB/Simulink. The performance of the FPIBC was evaluated through extensive case studies with different operational modes, including battery charge/discharge states and SOFC and PV parameter changes under varying load conditions. In addition, the proposed system was examined using a daily dynamic load profile. According to the simulation results, a peak efficiency of 97.28% is achieved and the voltage imbalance between the output ports is maintained below 0.5%. It is shown that the FPIBC has advantages over previous converters in terms of the number of ports, number of circuit elements, bipolar output voltage, bidirectional power flow, and efficiency.
dc.description.sponsorshipScientific Project Unit of Adana Alparslan Turkes Science and Technology University [21103005]
dc.description.sponsorshipThe authors would like to acknowledge the Scientific Project Unit of Adana Alparslan Turkes Science and Technology University (Project Number: 21103005) for full financial support.
dc.identifier.doi10.3390/electronics13061036
dc.identifier.issn2079-9292
dc.identifier.issue6
dc.identifier.scopus2-s2.0-85188697636
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.3390/electronics13061036
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2212
dc.identifier.volume13
dc.identifier.wosWOS:001191497600001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofElectronics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectdc microgrid
dc.subjectmultiport converters
dc.subjectrenewable energy integration
dc.subjectvoltage balancing
dc.titleFive-Port Isolated Bidirectional DC-DC Converter for Interfacing a Hybrid Photovoltaic-Fuel Cell-Battery System with Bipolar DC Microgrids
dc.typeArticle

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