Abstract
In this paper, we propose 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 uninterruptible power supply (UPS). A new cooperative model predictive control principle is proposed to enhance the response of multiconverter 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.
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