Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141612
Title: (2N+1) selective harmonic elimination-PWM for modular multilevel converters : a generalized formulation and a circulating current control method
Authors: Pérez-Basante, Angel
Ceballos, Salvador
Konstantinou, Georgios
Pou, Josep
Andreu, Jon
de Alegría, Iñigo Martínez
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2017
Source: Pérez-Basante, A., Ceballos, S., Konstantinou, G., Pou, J., Andreu, J., & de Alegría, I. M. (2018). (2N+1) selective harmonic elimination-PWM for modular multilevel converters : a generalized formulation and a circulating current control method. IEEE Transactions on Power Electronics, 33(1), 802-818. doi:10.1109/TPEL.2017.2666847
Journal: IEEE Transactions on Power Electronics
Abstract: The performance of modular multilevel converters (MMCs) in medium-voltage applications, where the number of required submodules is not high, can be improved utilizing low switching frequency modulations such as (2N+1) selective harmonic elimination-pulse width modulation (SHE-PWM), which provides tight control of lower order harmonics and low switching losses. This paper proposes a calculation method, which is based on a novel formulation, to solve the SHE-PWM problem. In particular, MMCs with (2N+1) phase output voltage levels are considered, obtaining a (2N+1) SHE-PWM waveform. This method utilizes a unique system of equations that is valid for any possible waveform. Therefore, it is able to calculate simultaneously, without predefined waveforms, both the switching patterns and the associated firing angles that solve the (2N+1) SHE-PWM problem. Consequently, the search process is simplified and optimized. Furthermore, this paper also proposes a circulating current control technique, which can be applied along with (2N+1) SHE-PWM without disturbing the phase output voltage. Simulation results and experimental tests obtained with a single-phase laboratory prototype prove the validity of the novel (2N+1) SHE-PWM implementation method and the proposed circulating current control technique.
URI: https://hdl.handle.net/10356/141612
ISSN: 0885-8993
DOI: 10.1109/TPEL.2017.2666847
Rights: © 2017 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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