IEEE Open Journal of the Industrial Electronics Society (Jan 2023)

Computationally Efficient MPC for Modular Multilevel Matrix Converters Operating With Fixed Switching Frequency

  • Rodrigo H. Cuzmar,
  • Andres Mora,
  • Javier Pereda,
  • Ricardo P. Aguilera,
  • Pablo Poblete,
  • Sebastian Neira

DOI
https://doi.org/10.1109/OJIES.2023.3347101
Journal volume & issue
Vol. 4
pp. 748 – 761

Abstract

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Modular multilevel matrix converters stand out for their performance in ac–ac high-power conversion. However, they require multiple control loops to govern the currents from both ac ports, the internal circulating currents, and the capacitor voltages. This article proposes a computationally efficient model predictive control (MPC) strategy based on a new converter modeling to exploit the phase-shifted pulsewidth modulation working principle fully, achieving four improvements: 1) control unification of both ac-ports currents, circulating currents, and capacitor voltages; 2) constrained optimization to safeguard the converter limits; 3) computational burden reduction and high scalability compared to standard MPC strategies; and 4) wide frequency operation with fast closed-loop transient responses, low harmonic distortion, and fixed switching frequency.

Keywords