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 | Schools: | School of Electrical and Electronic Engineering | Rights: | © 2017 IEEE. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | EEE Journal Articles |
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