access icon openaccess Vector control strategies to enable equal frequency operation of the modular multilevel matrix converter

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 21/06/2018, Accepted 27/07/2018, Published 22/01/2019

The modular multilevel matrix converter (M3C) is a power converter topology for ac to ac conversion that is suitable for high-power applications. The control of this converter is complex, particularly if ac system frequencies are similar. In these cases, the floating capacitors can present large voltage oscillations. Therefore, this study presents a new vector control system to enable the operation of the M3C when the frequencies at the input and output are virtually the same. The effectiveness of the proposed method has been validated using simulations and experimental results from a prototype M3C power converter with 27 cells.

Inspec keywords: matrix convertors; AC-AC power convertors

Other keywords: vector control system; power converter topology; modular multilevel matrix converter; M3C power converter; equal frequency operation; voltage oscillations; vector control strategies; ac-to-ac conversion; ac system frequencies; high-power applications

Subjects: Control of electric power systems; AC-AC power convertors

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