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Optimal control of DAB converter backflow power based on phase-shifting strategy

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Abstract

In order to solve the problems such as high backflow power and current stress of bidirectional DC–DC converter under the traditional single phase-shifting control, an optimized dual phase-shifting control method is proposed. Compared with the conventional phase-shifting control, this method can not only reduce the loss of the converter but also increase the flexibility of the control and realize full voltage range transmission. Firstly, the working principle of dual phase-shifting control and the mathematical model of backflow power are analyzed in detail. Then, the different operating range of return power according to the range of transmission power and voltage transformation ratio are derived. So as to achieve the goal of optimal operation of return power in full mode, the optimal solution of local return power and the corresponding combination of phase-shifting angle are found out. Finally, the superiorities of the control strategy are verified by the experimental results.

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Acknowledgement

This work was supported by the National Natural Science Foundation of China under Grant 51607064 and 51807058 and Natural Science Foundation of Hunan Province under Grant 2018JJ3129.

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Authors and Affiliations

  1. Department of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou, 412007, China

    Jinhui Zeng, Yuan He, Zheng Lan, Zongao Yi & Jing Liu

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  1. Jinhui Zeng
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  2. Yuan He
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  3. Zheng Lan
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  4. Zongao Yi
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  5. Jing Liu
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Correspondence to Zheng Lan.

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Communicated by B. B. Gupta.

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Zeng, J., He, Y., Lan, Z. et al. Optimal control of DAB converter backflow power based on phase-shifting strategy. Soft Comput 24, 6031–6038 (2020). https://doi.org/10.1007/s00500-020-04715-z

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