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Multi-Objective Unified Optimal Control Strategy for DAB Converters with Triple-Phase-Shift Control

Author

Listed:
  • Jinhui Zeng

    (College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China)

  • Yao Rao

    (College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China)

  • Zheng Lan

    (College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China)

  • Dong He

    (College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China)

  • Fan Xiao

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Bei Liu

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

Abstract

To solve the problems of large current stress, difficult soft-switching of all switches, and slow dynamic response of dual active bridge converters, a multi-objective unified optimal control strategy based on triple-phase-shift control was proposed. The forward power flow global modes of triple-phase-shift control were analyzed, and three high-efficiency modes were selected to establish the analytical models of current stress and soft-switching. Combined with these models, the optimal solutions in different modes were derived by using the cost function-optimization equation to overcome the limitation of the Lagrange multiplier method, such that the DAB converter achieved the minimum current stress, and all switches operated in the soft-switching state over the entire power range. At the same time, the virtual power component was introduced in the phase-shift ratio combination, which improved the dynamic response of output voltage under the input voltage or load steps changed by power control. The theoretical analysis and experimental results show that the proposed control strategy can optimize the performance of the DAB converter from three aspects, such as current stress, soft-switching, and dynamic response, which achieves multi-objective optimization of the steady-state and dynamic performance of DAB converters.

Suggested Citation

  • Jinhui Zeng & Yao Rao & Zheng Lan & Dong He & Fan Xiao & Bei Liu, 2021. "Multi-Objective Unified Optimal Control Strategy for DAB Converters with Triple-Phase-Shift Control," Energies, MDPI, vol. 14(20), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6444-:d:652128
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    Cited by:

    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.

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