Exploitation of additional degrees of freedom of multiphase drives in low-frequency operation of modular multilevel converters

M. Daoud, A. Elserougi, A. Abdel-Khalik, A. Massoud, R. Bojoi, S. Ahmed

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

MMC encounters serious limitations in the zero and low-frequency operation of variable-speed motor drives. In MMC, the voltage ripples of SubModule (SM) capacitor is inversely proportional to the phase current frequency. This paper proposes a new approach to solve the zero-/low- frequency operation technical issue of MMC-based drive systems. The proposed approach utilizes the additional degrees of freedom of multiphase machines to inject secondary-plane current components with certain magnitude and frequency in the load current to enable smooth operation during that interval. A simulation model of a three-level five- phase MMC-based Induction Machine (IM) drive system has been built using MATLAB/Simulink. In this paper, the adopted control strategy is explained and the simulation results are presented.
Original languageEnglish (US)
Title of host publication2019 16th Conference on Electrical Machines, Drives and Power Systems, ELMA 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781728114132
DOIs
StatePublished - Jun 1 2019
Externally publishedYes

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