RT Journal Article
T1 A comprehensive study of a hybrid modulation technique for the neutral-point-clamped converter
A1 Zaragoza, Jordi
A1 Pou, Josep
A1 Ceballos, Salvador
A1 Robles, Eider
A1 Ibáñez, Pedro
A1 Villate, Jose Luis
AB This paper presents a hybrid modulation technique for the three-level neutral-point-clamped converter. A modulation strategy, based on two modulation signals per phase, was presented previously. This strategy completely removes the low-frequency voltage oscillations that appear at the neutral point (NP) in some operation conditions. However, it also has a major drawback: it significantly increases the switching losses of the converter. The proposal in this paper combines such a modulation strategy with sinusoidal pulsewidth modulation (SPWM). The main characteristic of this hybrid modulation is the reduction in switching losses at the cost of some low-frequency voltage oscillations at the NP. The amplitude of these oscillations can be controlled by varying the combination of the two strategies. The performance of the hybrid modulation is analyzed and compared with the original strategies. Power losses and oscillation amplitudes on the dc-link capacitors are evaluated. Experimental results show how the hybrid modulation performs by balancing the dc-link capacitors.
SN 0278-0046
YR 2009
FD 2009
LK https://hdl.handle.net/11556/3629
UL https://hdl.handle.net/11556/3629
LA eng
NO Zaragoza , J , Pou , J , Ceballos , S , Robles , E , Ibáñez , P & Villate , J L 2009 , ' A comprehensive study of a hybrid modulation technique for the neutral-point-clamped converter ' , IEEE Transactions on Industrial Electronics , vol. 56 , no. 2 , pp. 294-304 . https://doi.org/10.1109/TIE.2008.2005132
NO Manuscript received December 31, 2007; revised August 11, 2008. First published September 23, 2008; current version published January 30, 2009. This work was supported by the Ministerio de Ciencia y Tecnologia of Spain under Projects ENE2007-67033-C03-00 and ENE2004-07881-C03-00, by the Department d’Universitats Recerca i Societat de la Informació of the Generalitat de Catalunya, by the Basque Country Government, and by the Torres Quevedo Program.
DS TECNALIA Publications
RD 26 jul 2024