Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Composite passivity-based control of DC/DC boost converters with constant power loads in DC Microgrids

  • Liu, Weipeng (School of Electrical Engineering, Hebei University of Technology) ;
  • Cui, Xiaofeng (School of Electrical Engineering, Hebei University of Technology) ;
  • Zhou, Jiyao (State Grid International Development Company) ;
  • Zhang, Zehua (School of Electrical Engineering, Hebei University of Technology) ;
  • Hou, Mingxuan (State Grid Horqin Electric Power Supply Company) ;
  • Shan, Shengqi (School of Electrical Engineering, Hebei University of Technology) ;
  • Wu, Shang (Super High Voltage Branch of State Grid Jibei Electric Power Company)
  • Received : 2022.01.20
  • Accepted : 2022.06.23
  • Published : 2022.11.20
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Abstract

In this paper, a composite passivity-based control method based on a finite-time disturbance observer (FTDO) and a passivity-based control (PBC) is proposed to improve the stability of the Boost converters with constant power loads in DC Microgrids. The FTDO improves the robustness and rapidity of the system by accurately estimating system disturbances. The PBC ensures the stability of the system via its transient energy dissipation. The FTDO operates parallel to the PBC, and compensates the observed value to the PBC through a feedforward channel. When compared with other controls, the proposed composite passivity-based control has the advantages of a fast dynamic response and accurate tracking of system disturbances in a wide working range. Finally, the control method proposed in this paper is verified by MATLAB/Simulink simulations and hardware in the hard-ware-in-loop experiments.

Keywords

Acknowledgement

This work was supported by the Foundation of the National Natural Science Foundation of China under Grant No. 61941303, 62073118 and the Natural Science Foundation of Hebei Province under Grant No. F2020202009.

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