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A Novel Six-Band Hysteresis Control for the Packed U Cells Seven-Level Converter: Experimental Validation

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3 Author(s)
Ounejjar, Y. ; Dept. of Electr. Eng., Ecole De Technol. Super., Montreal, QC, Canada ; Al-Haddad, K. ; Dessaint, L.A.

In this paper, the authors propose a novel six-band hysteresis technique to efficiently control the seven-level packed U cells (PUC) converter. The proposed PUC combines advantages of the flying capacitor and the cascaded H-bridge topologies. The novel control strategy is proposed in order to insure a good operation of the PUC converter in both inverter and rectifier modes. In case of rectifier operation, the proposed six-band controller is designed to draw a sinusoidal line current (load current in case of inverter operation) with a unity power factor. Harmonics contents of line current (or load current) and rectifier input voltage (or inverter output voltage) are very low which permits the reduction of the active and passive filters ratings resulting on a very high energetic efficiency and a reduced installation cost. The proposed concept was validated through experimental implementation using real-time controller, the DS1103 of dSpace.

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Industrial Electronics, IEEE Transactions on  (Volume:59 ,  Issue: 10 )