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An Isolated Three-Port Bidirectional DC-DC Converter with Enlarged ZVS Region for HESS Applications in DC Microgrids

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  • Cheng-Shan Wang

    (School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China)

  • Wei Li

    (School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China)

  • Yi-Feng Wang

    (School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China)

  • Fu-Qiang Han

    (School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China)

  • Zhun Meng

    (School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China)

  • Guo-Dong Li

    (Electric Power Research Institute, State Grid Tianjin Electric Power Company, Tianjin 300384, China)

Abstract

In this paper, a two-stage three-port isolated bidirectional DC-DC converter (BDC) for hybrid energy storage system (HESS) applications in DC microgrids is proposed. It has an enlarged zero-voltage-switching (ZVS) region and reduced power circulation loss. A front-end three-phase interleaved BDC is introduced to the supercapacitor (SC) channel to compensate voltage variations of SC. Consequently, wide ZVS range and reduced circulation power loss for SC and DC bus ports are achieved under large-scale fluctuating SC voltage. Furthermore, a novel modified pulse-width-modulation (PWM) and phase-shift (PHS) hybrid control method with two phase-shift angles is proposed for BA port. And it contributes to an increasing number of switches operating in ZVS mode with varying battery (BA) voltage. Phase shift control with fixed driving frequency is applied to manage power flow. The ZVS range as well as the current stress of resonant tanks under varying port voltages is analyzed in detail. Finally, a 1 kW prototype with peak efficiency of 94.9% is built, and the theoretical analysis and control method are verified by experiments.

Suggested Citation

  • Cheng-Shan Wang & Wei Li & Yi-Feng Wang & Fu-Qiang Han & Zhun Meng & Guo-Dong Li, 2017. "An Isolated Three-Port Bidirectional DC-DC Converter with Enlarged ZVS Region for HESS Applications in DC Microgrids," Energies, MDPI, vol. 10(4), pages 1-23, April.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:4:p:446-:d:94757
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    References listed on IDEAS

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    Cited by:

    1. Matej Bereš & Dobroslav Kováč & Tibor Vince & Irena Kováčová & Ján Molnár & Iveta Tomčíková & Jozef Dziak & Patrik Jacko & Branislav Fecko & Šimon Gans, 2021. "Efficiency Enhancement of Non-Isolated DC-DC Interleaved Buck Converter for Renewable Energy Sources," Energies, MDPI, vol. 14(14), pages 1-15, July.
    2. Dorin Petreus & Radu Etz & Toma Patarau & Ionut Ciocan, 2020. "Comprehensive Analysis of a High-Power Density Phase-Shift Full Bridge Converter Highlighting the Effects of the Parasitic Capacitances," Energies, MDPI, vol. 13(6), pages 1-20, March.
    3. Wenzheng Xu & Nelson Hon Lung Chan & Siu Wing Or & Siu Lau Ho & Ka Wing Chan, 2017. "A New Control Method for a Bi-Directional Phase-Shift-Controlled DC-DC Converter with an Extended Load Range," Energies, MDPI, vol. 10(10), pages 1-17, October.
    4. Yong-Nong Chang & Yih-Her Yan & Sheng-Min Huang, 2023. "An Isolated Three-Port Power Converter with 2C3L and 2C2L Resonant Circuits," Energies, MDPI, vol. 16(4), pages 1-18, February.
    5. Shu-huai Zhang & Yi-feng Wang & Bo Chen & Fu-qiang Han & Qing-cui Wang, 2018. "Studies on a Hybrid Full-Bridge/Half-Bridge Bidirectional CLTC Multi-Resonant DC-DC Converter with a Digital Synchronous Rectification Strategy," Energies, MDPI, vol. 11(1), pages 1-22, January.
    6. Pablo Quintana-Barcia & Tomislav Dragicevic & Jorge Garcia & Javier Ribas & Josep M. Guerrero, 2018. "A Distributed Control Strategy for Islanded Single-Phase Microgrids with Hybrid Energy Storage Systems Based on Power Line Signaling," Energies, MDPI, vol. 12(1), pages 1-16, December.
    7. Ramy Georgious & Jorge Garcia & Mark Sumner & Sarah Saeed & Pablo Garcia, 2020. "Fault Ride-Through Power Electronic Topologies for Hybrid Energy Storage Systems," Energies, MDPI, vol. 13(1), pages 1-19, January.
    8. Ramy Georgious & Jorge Garcia & Pablo Garcia & Angel Navarro-Rodriguez, 2018. "A Comparison of Non-Isolated High-Gain Three-Port Converters for Hybrid Energy Storage Systems," Energies, MDPI, vol. 11(3), pages 1-24, March.

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