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A Backflow Power Suppression Strategy for Dual Active Bridge Converter Based on Improved Lagrange Method

Author

Listed:
  • Xinwen Zhang

    (School of Electrical Information Engineering, North Minzu University, Yinchuan 750021, China)

  • Canlong Wang

    (School of Electrical Information Engineering, North Minzu University, Yinchuan 750021, China)

Abstract

Dual-active bridge (DAB) converters are receiving increasing attention from researchers as a critical part of the power transmission of energy routers. However, the DAB converter generates a large backflow power in conventional control mode, and when the load is mutated, its output voltage takes longer to return to the reference value accompanied by large fluctuations. To solve the above problems, a hybrid strategy is proposed in this paper to optimize the converter. The mathematical models of the transmitted power and the backflow power were firstly derived through in-depth analysis of the DAB converter under extended-phase-shift (EPS) modulation, and the suppression of the backflow power was performed according to the improved Lagrange method utilized in the obtained results. Moreover, considering the poor dynamic characteristics of DAB converters under PI control, according to the state space average model of output voltage in the paper, a model prediction control equation is established to improve the dynamic response of the converter by predicting the output voltage value at the next moment. The simulation results verify the effectiveness of the optimization strategy presented in the text.

Suggested Citation

  • Xinwen Zhang & Canlong Wang, 2023. "A Backflow Power Suppression Strategy for Dual Active Bridge Converter Based on Improved Lagrange Method," Energies, MDPI, vol. 16(15), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:15:p:5683-:d:1205380
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    References listed on IDEAS

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    1. Marek Turzyński & Serafin Bachman & Marek Jasiński & Szymon Piasecki & Marek Ryłko & Huang-Jen Chiu & Shih-Hao Kuo & Yu-Chen Chang, 2022. "Analytical Estimation of Power Losses in a Dual Active Bridge Converter Controlled with a Single-Phase Shift Switching Scheme," Energies, MDPI, vol. 15(21), pages 1-23, November.
    2. Haoyu Zhang & Takanori Isobe, 2022. "An Improved Charge-Based Method Extended to Estimating Appropriate Dead Time for Zero-Voltage-Switching Analysis in Dual-Active-Bridge Converter," Energies, MDPI, vol. 15(2), pages 1-15, January.
    3. Muhammad Faisal Fiaz & Sandro Calligaro & Mattia Iurich & Roberto Petrella, 2022. "Analytical Modeling and Control of Dual Active Bridge Converter Considering All Phase-Shifts," Energies, MDPI, vol. 15(8), pages 1-32, April.
    4. Michał Rolak & Maciej Twardy & Cezary Soból, 2022. "Generalized Average Modeling of a Dual Active Bridge DC-DC Converter with Triple-Phase-Shift Modulation," Energies, MDPI, vol. 15(16), pages 1-15, August.
    5. 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.
    Full references (including those not matched with items on IDEAS)

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