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Cooperative and Dynamically Weighted Model Predictive Control of a 3-Level Uninterruptible Power Supply with Improved Performance and Dynamic Response

Caseiro, L. ; Mendes, A. M. S. ; Cruz, S. M. A.

IEEE Transactions on Industrial Electronics Vol. 67, Nº 6, pp. 4934 - 4945, June, 2019.

ISSN (print): 0278-0046
ISSN (online):

Journal Impact Factor: 5,468 (in 2008)

Digital Object Identifier: 10.1109/TIE.2019.2921283

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Abstract
This paper proposes a 3-level double conversion uninterruptible power supply with a new cooperative and dynamically weighted model predictive control technique. A 3-level DC-DC converter is used to improve the DC bus balance and the overall response of the UPS. A new cooperative model predictive control principle is proposed to enhance the response of multi-converter systems. New controllers are proposed for all converters of the UPS, based on the dynamically weighted model predictive control technique and using the presented cooperative principle. A new power management technique is also proposed for the UPS. The proposed 3-level UPS system presents improved dynamic response and steady-state performance in distinct operating points, when compared to the conventional system. Experimental results demonstrate the advantages of each proposed novelty.