Energy Reports (Nov 2021)

A novel continuous control set model predictive control to guarantee stability and robustness for buck power converter in DC microgrids

  • Jiyao Zhou,
  • Mustafa Alrayah Hassan,
  • Jiaxuan Zhang,
  • Zehua Zhang,
  • Shang Wu,
  • Mingxuan Hou,
  • Yongjian Li,
  • Erping Li,
  • Josep M. Guerrero

Journal volume & issue
Vol. 7
pp. 1400 – 1415

Abstract

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In this paper, an adaptive continuous control set model predictive control (CCS-MPC) is proposed to eliminate the instability problem caused by the constant power load (CPL) in DC–DC​ buck converter applied in DC microgrids. Based on the dynamic model of energy storage elements(inductor and capacitor) in circuit, a parallel feedforward algorithm (PFA) is designed to estimate the variation of the load and input voltage. By supplying the information of the variation to the CCS-MPC controller, the large signal stability and fast recovery performance can be ensured under the existence of disturbances. To verify the control robustness of the adaptive CCS-MPC controller, the MATLAB simulations, hardware-in-loop (HIL) experiments and rapid-control-prototype (RCP) experimental results are conducted. Moreover, the comparative simulations and HIL experiments towards other nonlinear controller are conducted to investigates its dynamic performance.

Keywords