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Photovoltaic Energy Storage System Based on Bidirectional LLC Resonant Converter Control Technology

Author

Listed:
  • Di Xie

    (New Energy Research Center, School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Liangliang Wang

    (Guangdong HYNN Technologies Co., Ltd., Dongguan 523808, China)

  • Zhi Zhang

    (Department of Electrical Engineering and Automation, Dongguan University of Technology, Dongguan 523808, China)

  • Shoumo Wang

    (Guangdong HYNN Technologies Co., Ltd., Dongguan 523808, China)

  • Longyun Kang

    (New Energy Research Center, School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Jigang Yao

    (Guangdong HYNN Technologies Co., Ltd., Dongguan 523808, China)

Abstract

Bidirectional DC/DC converters are widely adopted in new energy power generation systems. Because of the low conversion efficiency and non-isolation for conventional, bidirectional DC/DC converters in the photovoltaic energy storage complementary system, this paper proposes a bidirectional isolation LLC converter topology, with compensating inductance for the energy storage system; it has excellent characteristics, such as wide input voltage range and soft switching in full-load range. First, an AC equivalent model based on the fundamental wave equivalent method is established to derive the voltage gain. Meanwhile, a small signal model is also built to design a reasonably closed-looped controller. Finally, the improved bidirectional LLC resonant converter is applied to the photovoltaic energy storage complementary system. The correctness and feasibility for the bidirectional LLC converter topology under the proposed charging and discharging control strategy of the DC bus are verified by simulation and experimental results.

Suggested Citation

  • Di Xie & Liangliang Wang & Zhi Zhang & Shoumo Wang & Longyun Kang & Jigang Yao, 2022. "Photovoltaic Energy Storage System Based on Bidirectional LLC Resonant Converter Control Technology," Energies, MDPI, vol. 15(17), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6436-:d:905744
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    Citations

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    Cited by:

    1. You-Kun Tai & Kuo-Ing Hwu, 2023. "A Control Design Technology of Isolated Bidirectional LLC Resonant Converter for Energy Storage System in DC Microgrid Applications," Energies, MDPI, vol. 16(19), pages 1-34, September.
    2. Sebastián Riffo & Walter Gil-González & Oscar Danilo Montoya & Carlos Restrepo & Javier Muñoz, 2022. "Adaptive Sensorless PI+Passivity-Based Control of a Boost Converter Supplying an Unknown CPL," Mathematics, MDPI, vol. 10(22), pages 1-15, November.

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