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Analysis of a coupled inductor boost three-port converter with high voltage gain for renewable energy systems

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Abstract

A conventional boost three-port converter is combined with a coupled-inductor-based boost-flyback converter in this work to produce a high-step-up three-port converter. The proposed converter inherits the benefits of two conventional converters, including high voltage gain, few elements, and energy recycling of the leakage inductor. In addition, the voltage stresses of switches are considerably lower than the output voltage. Therefore, switches with low ON resistance can be selected to reduce the conduction loss. Additionally, the freewheel diodes are capable of zero-current switching. The operation principle can be divided into three modes of operation, and the three steady-state operation modes are analyzed under each of the three conduction modes. The operation principles of various modes, the voltage characteristics, the boundary of the coupled inductor, and the proposed converter’s control method are discussed in depth to provide detailed theoretical guidance to designers. Then, the simulation and experiment results of a laboratory prototype with an 18 V PV source, 24 V battery pack, and 180 V output are presented to validate the feasibility of the theoretical analysis.

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Acknowledgements

This research is supported by the National Natural Science Foundation of China (52077199).

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Authors and Affiliations

  1. College of Electrical Engineering, Zhejiang University, Hangzhou, China

    Ming Gao, Shanshan Wang, Weichen Yu & Jianjiang Shi

  2. State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, Shanghai, China

    Tao Liu

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  1. Ming Gao
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  2. Shanshan Wang
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  3. Weichen Yu
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  4. Tao Liu
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Correspondence to Jianjiang Shi.

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Gao, M., Wang, S., Yu, W. et al. Analysis of a coupled inductor boost three-port converter with high voltage gain for renewable energy systems. J. Power Electron. 22, 2100–2121 (2022). https://doi.org/10.1007/s43236-022-00533-8

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  • DOI: https://doi.org/10.1007/s43236-022-00533-8

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