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

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Abstract
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 paper proposes a computationally efficient Model Predictive Control (MPC) strategy based on a new converter modeling to exploit the phase-shifted PWM working principle fully, achieving four improvements: i) control unification of both ac-ports currents, circulating currents, and capacitor voltages; ii) constrained optimization to safeguard the converter limits; iii) computational burden reduction and high scalability compared to standard MPC strategies; and iv) wide frequency operation with fast closed-loop transient responses, low harmonic distortion, and fixed switching frequency.
Funding Information
  • ANID projects (Fondecyt/1220928, FONDAP/1522A0006 SERC Chile, Fondecyt/1231030, Fondequip/EQM210117)
  • Basal Project FB0008 Advanced Center for Electrical and Electronic Engineering
  • Australian Government through the Australian Research Council (DP210101382)
  • ANID (ANID/AnidNacional/21200622)

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