Predictive Control of a Three-Phase Neutral-Point-Clamped Inverter
Vargas, R.; Cortes, P.; Ammann, U.; Rodriguez, J.; Pontt, J.
Industrial Electronics, IEEE Transactions on
Volume 54, Issue 5, Oct. 2007 Page(s):2697 - 2705
Digital Object Identifier 10.1109/TIE.2007.899854
Summary:A new predictive strategy for current control of a three-phase neutral-point-clamped inverter is presented. The algorithm is based on a model of the system. From that model, the behavior of the system is predicted for each possible switching state of the inverter. The state that minimizes a given quality function is selected to be applied during the next sampling interval. Several compositions of are proposed, including terms dedicated to achieve reference tracking, balance in the dc link, and reduction of the switching frequency. In comparison to an established control method, the strategy presents a remarkable performance. The proposed method achieves comparable reference tracking with lower switching frequency per semiconductor and similar transient behavior. The main advantage of the method is that it does not require any kind of linear controller or modulation technique, achieving a different approach to control a power converter.
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