Sequential Phase-Shifted Model Predictive Control for multicell power converters

Aguilera, R, ACUNA, P, Su, X, Lezana, P and McGrath, B 2017, 'Sequential Phase-Shifted Model Predictive Control for multicell power converters', in Proceedings of the 2017 IEEE Southern Power Electronics Conference (SPEC 2017), Puerto Varas, Chile, 4-7 December 2017, pp. 764-769.

Document type: Conference Paper
Collection: Conference Papers

Title Sequential Phase-Shifted Model Predictive Control for multicell power converters
Author(s) Aguilera, R
Su, X
Lezana, P
McGrath, B
Year 2017
Conference name SPEC 2017
Conference location Puerto Varas, Chile
Conference dates 4-7 December 2017
Proceedings title Proceedings of the 2017 IEEE Southern Power Electronics Conference (SPEC 2017)
Publisher IEEE
Place of publication United States
Start page 764
End page 769
Total pages 6
Abstract This paper proposes a sequential Phase-Shifted Model Predictive Control (PS-MPC) strategy for multicell power converters. The key novelty of this proposal lies in the way the predictive control strategy is formulated to fully exploit a phase-shifted pulse width modulation (PS-PWM) stage. Normally, when using a linear controller along with a standard PS-PWM stage, the modulator receives the same duty cycle for all the internal carriers. In contrast, by means of an appropriate choice of synchronized models for each carrier, the proposed predictive controller obtains independent optimal duty cycles for each carrier in a sequential manner. This allows one to formulate the optimal control problem to govern not only the output current but also the internal floating capacitor voltages, similarly to the finite-control-set MPC (FCS-MPC) case. As a result, the proposed sequential PS-MPC can attain a faster floating voltage balancing dynamic when compared to a standard PS-PWM implementation. Moreover, it generates a fixed-spectrum in the steady state with a constant commutation rate, which outperforms a standard FCS-MPC strategy. Simulation results of the proposed sequential PS-MPC strategy governing a single-phase four-level flying capacitor converter are presented to verify its dynamic and steady-state performance.
Subjects Power and Energy Systems Engineering (excl. Renewable Power)
Industrial Electronics
Keyword(s) Predictive control
predictive models
control design
sequential analysis
flying capacitor
multilevel converters
pulse width modulation (PWM)
power conversion.
DOI - identifier 10.1109/SPEC.2017.8333644
Copyright notice Copyright © 2017 by the Institute of Electrical and Electronics Engineers, Inc. All Rights Reserved.
ISBN 9781509064250
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