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Virtual Flux Based Finite Set Predictive Power Control of a Neutral Point Clamped Rectifier

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3 Author(s)
Lobos, F.R. ; Inst. for Electr. Drive Syst. & Power Electron., Tech. Univ. Munich, Munich, Germany ; Kennel, R. ; Rodriguez, J.

In this paper Virtual Flux Based Finite Set Predictive Power Control (VF-FS-PPC) of a Neutral-Point-Clamped (NPC) Rectifier is presented. Finite Set Model Predictive Control (FS-MPC) takes advantage of the non-linear nature of the power electronic converter, minimizing in every sample time a cost function, which is evaluated for each one of the converter switching states. The Virtual-Flux control technique is used to decrease the current harmonic distortion (THDi) under distorted grid voltages in active rectifiers. This paper also introduces a new method to predict the current in FS-MPC, which allows easy prediction of current without grid voltage measurement. Also new cost function design to reduce the switching frequency is proposed. These topics are presented and discussed in this paper and also compared with the standard Finite Set Predictive Power Control(FS-PPC). All results are verificated by simulations in MatLab/Simulink.

Published in:

Energy Conference and Exhibition (ENERGYCON), 2012 IEEE International

Date of Conference:

9-12 Sept. 2012

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