Predictive Optimal Switching Sequence Direct Power Control for Grid-Tied 3L-NPC Converters

A model predictive control (MPC) strategy based on optimal switching sequence concepts is presented for direct power control of grid-connected three-level neutral-point clamped converters. The proposed control strategy explicitly considers the modulator in its formulation along with the model of the...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 68; no. 9; pp. 8561 - 8571
Main Authors Mora, Andres, Cardenas, Roberto, Aguilera, Ricardo P., Angulo, Alejandro, Lezana, Pablo, Lu, Dylan Dah-Chuan
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Converters
Model predictive control (MPC)
multilevel converter
Optimal control
optimal switching sequence (OSS)
Optimization
Power control
Predictive control
Pulse width modulation
Reactive power
Switches
Switching sequences
Trajectory
Trajectory control
Voltage control
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Summary:A model predictive control (MPC) strategy based on optimal switching sequence concepts is presented for direct power control of grid-connected three-level neutral-point clamped converters. The proposed control strategy explicitly considers the modulator in its formulation along with the model of the system. Through two well-formulated optimal control problems, the proposed strategy is shown to optimally achieve control of the average trajectory of the active and reactive powers as well as the dc-link capacitor voltages without using weighting factors to tradeoff both control targets. Experimental results demonstrate this strategy produces improved steady-state performance with a well-defined output voltage spectrum and fixed-switching frequency while maintaining the inherent fast dynamic responses of MPC strategies.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3009602