DC-Link Neutral Point Control for 3L-NPC Converters Utilizing Selective Harmonic Elimination-PWM

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URI: https://hdl.handle.net/11556/4132
ISSN: 0278-0046
DOI: 10.1109/TIE.2021.3113019
Publication date
2022-09-01
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Abstract
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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Publisher Copyright: © 1982-2012 IEEE.
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DC-link voltage control , modulation , neutral-point control , neutral-point-clamped (NPC) converter , selective harmonic elimination (SHE) , voltage source converters (VSCS) , Control and Systems Engineering , Electrical and Electronic Engineering
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journal article
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Sanchez-Ruiz , A , Mazuela , M , Fernandez-Rebolleda , H , Ceballos , S , Perez-Basante , A , Ibanez-Hidalgo , I , Zubiaga , M , Pou , J , Beniwal , N & Konstantinou , G 2022 , ' DC-Link Neutral Point Control for 3L-NPC Converters Utilizing Selective Harmonic Elimination-PWM ' , IEEE Transactions on Industrial Electronics , vol. 69 , no. 9 , pp. 8633-8644 . https://doi.org/10.1109/TIE.2021.3113019