Model-Free Predictive Control of Five-Level T-Type Nested Neutral Point Clamped Converter

Multilevel converters have been turned into a prominent solution for high-power, medium-voltage applications. However, controlling multilevel converters is a complex task, which is typically implemented through Single-Input Single-Output loops or via finite control set model predictive control (FCS-...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2025-01, p.1-1
Main Authors: Gonzalez-Castano, Catalina, Norambuena, Margarita, Navas-Fonseca, Alex, Flores-Bahamonde, Freddy, Davari, Alireza, Young, Hector, Heydari, Rasool, Rodriguez, Jose
Format: Article
Language:English
Subjects:
Capacitors
Computational modeling
five-level topology
Mathematical models
model-free predictive control (MF-PC)
Multilevel converter
Multilevel converters
Predictive models
Switches
T-type structure
Topology
Uncertainty
Voltage
Voltage control
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Summary:Multilevel converters have been turned into a prominent solution for high-power, medium-voltage applications. However, controlling multilevel converters is a complex task, which is typically implemented through Single-Input Single-Output loops or via finite control set model predictive control (FCS-PC). Moreover, among the latest proposed multilevel converters, the five-level T-type nested neutral point clamped (5L-T-NNPC) stands out due to its reduced hardware requirements and wide voltage range applications. Although FCS-MPC has good performance with a fast dynamic response for operating this converter, this control strategy requires a detailed model of the converter, where parameter or model mismatch, will degrade its performance. To improve the operation, this paper proposes a novel model-free predictive control (MF-PC) which does not require a detailed model of the converter to operate, and it is robust under parameter mismatch. Indeed it only requires the operation data of the converter to identify the parameters of a general auto-regressive with exogenous input (ARX) model via the least squares algorithm. Experimental and simulation results validate the better performance of the proposed MF-PC over the conventional FCS-MPC for a 5L-T-NNPC converter.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2025.3525803