%0 Journal Article
%A Sanchez-Ruiz, Alain
%A Mazuela, Mikel
%A Fernandez-Rebolleda, Hector
%A Ceballos, Salvador
%A Perez-Basante, Angel
%A Ibanez-Hidalgo, Irati
%A Zubiaga, Markel
%A Pou, Josep
%A Beniwal, Neha
%A Konstantinou, Georgios
%T DC-Link Neutral Point Control for 3L-NPC Converters Utilizing Selective Harmonic Elimination-PWM
%D 2022
%@ 0278-0046
%U https://hdl.handle.net/11556/4132
%X Selective harmonic elimination-pulsewidth modulation (SHE-PWM) is a modulation technique widely used to improve the efficiency and harmonic content in medium-voltage high-power converters. Among these converters, the three-level neutral-point-clamped (3L-NPC) converter is one of the most utilized topologies. However, the 3L-NPC converter requires a proper balancing of dc-link capacitor voltages. This article presents a control technique, based on pulse shifting method, to regulate the neutral point voltage when SHE-PWM is utilized. The proposed technique performs well with any power factor and it can also be directly applied to T-type converters and easily extrapolated to other multilevel topologies. The proposed method is experimentally validated in a scaled-down power converter and a full-scale medium-voltage 3L-NPC converter.
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