Multi-Port Multi-Directional Converter with Multi-Mode Operation and Leakage Energy Recycling for Green Energy Processing

Chih-Lung Shen, Li-Zhong Chen, Guan-Yu Chen and Ching-Ming Yang
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Chih-Lung Shen: Department of Electronic Engineering, National Kaohsiung University of Science and Technology, No. 1, University Rd., Yanchao Dist., Kaohsiung 82445, Taiwan
Li-Zhong Chen: Department of Electronic Engineering, National Kaohsiung University of Science and Technology, No. 1, University Rd., Yanchao Dist., Kaohsiung 82445, Taiwan
Guan-Yu Chen: Department of Electronic Engineering, National Kaohsiung University of Science and Technology, No. 1, University Rd., Yanchao Dist., Kaohsiung 82445, Taiwan
Ching-Ming Yang: Department of Electronic Engineering, National Kaohsiung University of Science and Technology, No. 1, University Rd., Yanchao Dist., Kaohsiung 82445, Taiwan

Energies, 2022, vol. 15, issue 15, 1-26

Abstract: In this article, a novel multi-port multi-directional converter (MPMDC) is proposed. Even though the power stage of the MPMDC belongs to a single-stage structure, it can control power flow direction handily among ports and achieve converter operation in up to five modes. The MPMDC has the feature of galvanic isolation and can obtain a high voltage conversion ratio even under the adoption of only one inductor and one transformer. The leakage energy of the transform can be recycled to improve overall efficiency. Once the MPMDC is applied to deal with renewable energy, battery, and bus energy, the advantage of multi-directional control of power flow can advance an energy storage system to perfectly function power conditioning feature. In addition to the discussion of converter operation, voltage gain, voltage stress, current stress, and inductance design are analyzed theoretically. Comparisons with some of the latest similar converters are also carried out. A 200-W prototype is built and measured. According to the practical results, it is verified that the hardware measurements meet the theoretical derivations and the MPMDC is validated. The maximum efficiency of the converter is up to 94%.

Keywords: multi-port multi-directional converter; galvanic isolation; high conversion ratio; leakage energy recycling; single stage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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