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Efficiency Optimization Control Strategies for High-Voltage-Ratio Dual-Active-Bridge (DAB) Converters in Battery Energy Storage Systems

Author

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  • Hui Ma

    (Institute of Renewable Energy, Shenzhen Poweroak Newener Co., Ltd., Shenzhen 518116, China
    Department of Electrical Engineering, North China Electric Power University, Baoding 071000, China)

  • Jianhua Lei

    (Institute of Renewable Energy, Shenzhen Poweroak Newener Co., Ltd., Shenzhen 518116, China
    Shenzhen International Graduate School, Tsinghua University, Shenzhen 518071, China)

  • Geng Qin

    (Institute of Renewable Energy, Shenzhen Poweroak Newener Co., Ltd., Shenzhen 518116, China
    Department of Electrical Engineering, North China Electric Power University, Baoding 071000, China)

  • Zhihua Guo

    (Institute of Renewable Energy, Shenzhen Poweroak Newener Co., Ltd., Shenzhen 518116, China)

  • Chuantong Hao

    (Institute of Renewable Energy, Shenzhen Poweroak Newener Co., Ltd., Shenzhen 518116, China)

Abstract

This article introduces a high-efficiency, high-voltage-ratio bidirectional DC–DC converter based on the Dual-Active-Bridge (DAB) topology, specifically designed for applications involving low-voltage, high-capacity cells. Addressing the critical challenge of enhancing bidirectional power transfer efficiency under ultra-high step-up ratios, which is essential for integrating renewable energy sources and battery storage systems into modern power grids, an optimized control strategy is proposed. This strategy focuses on refining switching patterns and minimizing conduction losses to improve overall system efficiency. Theoretical analysis revealed significant enhancements in efficiency across various operating conditions. Simulation results further confirmed that the converter achieved exceptional performance in terms of efficiency at extremely high voltage conversion ratios, showcasing full-range Zero-Voltage Switching (ZVS) capabilities and reduced circulating reactive power. Specifically, the proposed method reduced circulating reactive power by up to 22.4% compared to conventional fixed-frequency control strategies, while achieving over 35% overload capability. These advancements reinforce the role of DAB as a key topology for next-generation high-performance power conversion systems, facilitating more efficient integration of renewable energy and energy storage solutions, and thereby contributing to the stability and sustainability of contemporary energy systems.

Suggested Citation

  • Hui Ma & Jianhua Lei & Geng Qin & Zhihua Guo & Chuantong Hao, 2025. "Efficiency Optimization Control Strategies for High-Voltage-Ratio Dual-Active-Bridge (DAB) Converters in Battery Energy Storage Systems," Energies, MDPI, vol. 18(10), pages 1-19, May.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:10:p:2650-:d:1660336
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    1. de Hoog, Joris & Timmermans, Jean-Marc & Ioan-Stroe, Daniel & Swierczynski, Maciej & Jaguemont, Joris & Goutam, Shovon & Omar, Noshin & Van Mierlo, Joeri & Van Den Bossche, Peter, 2017. "Combined cycling and calendar capacity fade modeling of a Nickel-Manganese-Cobalt Oxide Cell with real-life profile validation," Applied Energy, Elsevier, vol. 200(C), pages 47-61.
    2. Garry Jean-Pierre & Necmi Altin & Ahmad El Shafei & Adel Nasiri, 2022. "Overall Efficiency Improvement of a Dual Active Bridge Converter Based on Triple Phase-Shift Control," Energies, MDPI, vol. 15(19), pages 1-28, September.
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