Soft-Switching Three-Port Converter with a Three-Winding Coupled Inductor

In this paper, a non-isolated soft-switching three-port converter is proposed for renewable energy systems. Only one coupled inductor is used for regulating five different power flows among the three ports to improve the voltage gain. By cascoding Photovoltaic (PV) and battery modules, the input cur...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2023-10, Vol.11 (5), p.1-1
Main Authors: Liang, Tsorng-Juu, Tran, Thai Anh Au, Huynh, Kim Kien Nghiep, Chen, Kai-Hui
Format: Article
Language:English
Subjects:
Active clamp
Batteries
Circuits
Clamps
coupled inductor
DC-DC converter
Design parameters
High-voltage techniques
Inductors
Load flow
Modules
Photovoltaic cells
Power flow
soft-switching
Switches
Switching
three-port converter
Topology
Voltage gain
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Summary:In this paper, a non-isolated soft-switching three-port converter is proposed for renewable energy systems. Only one coupled inductor is used for regulating five different power flows among the three ports to improve the voltage gain. By cascoding Photovoltaic (PV) and battery modules, the input current is reduced, enabling the proposed converter to operate at a reasonable duty cycle and achieve higher efficiency. In addition, utilizing only one active clamp circuit in all power flows, the leakage inductor energy can be recycled, and the main switches can achieve zero voltage switching (ZVS), resulting in low voltage spike and high efficiency in all power flow stages. Operating principles and steady state analyses of the proposed three-port converter are presented, and the design of key parameters is then discussed in detail. Finally, a 300 W-400 V converter prototype is implemented in the laboratory to verify the theoretical analyses.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2023.3304308