Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Model predictive control of nine-switch converter with output filter for independent control of two loads

  • Pang, Yi (School of Control and Mechanical Engineering, Tianjin Chengjian University) ;
  • Zhang, Jingmei (School of Control and Mechanical Engineering, Tianjin Chengjian University) ;
  • Xu, Dongxing (School of Control and Mechanical Engineering, Tianjin Chengjian University) ;
  • Yin, Chang (School of Control and Mechanical Engineering, Tianjin Chengjian University) ;
  • Wu, Zifeng (School of Control and Mechanical Engineering, Tianjin Chengjian University) ;
  • Sun, Hexu (School of Electrical Engineering, Hebei University of Science and Technology) ;
  • Pan, Lei (School of Control and Mechanical Engineering, Tianjin Chengjian University)
  • Received : 2019.12.23
  • Accepted : 2020.08.31
  • Published : 2021.01.20
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Abstract

This paper proposes a model predictive control (MPC) algorithm designed for nine-switch converter with output filter (NSCOF) to control two three-phase AC loads independently. A state function of each leg of nine-switch converter (NSC) is established to characterize the internal conditions of the NSC because the traditional model of the NSCOF does not involve the interior model of the NSC. Based on the NSCOF model with the state function of each leg, a prediction model of NSCOF is constructed. The two AC terminals of NSCOF are treated as one module when the MPC is designed. The proposed MPC achieves controlling two three-phase AC loads working under different frequency modes. Furthermore, this algorithm is independent of the modulation method for reducing the difficulty of the controller design and its limits. The simulation and experimental results reveal that the steady-state and dynamic response performance of NSCOF are substantially improved using MPC.

Keywords

Acknowledgement

This work was supported by the Tianjin Education Commission Scientific Research Project [2018KJ179].

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