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A new switching scheme for reduced switching frequency and balanced capacitor voltages for back-to-back connected, diode-clamped multilevel converters

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4 Author(s)
Minshull, S.R. ; Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield ; Bingham, C.M. ; Stone, D.A. ; Foster, M.P.

This paper presents a new switching scheme for back-to-back connected diode-clamped multilevel converters that reduces the devices switching frequency while maintaining capacitor balancing. Comparisons are made between an optimal balancing strategy and a reduced switching strategy with data gathered from a prototype 5-level, back-to-back connected, diode clamped multilevel converter. The proposed scheme is shown to reduce the switching frequency when compared to the optimal balancing case.

Published in:

Power Electronics, Machines and Drives, 2008. PEMD 2008. 4th IET Conference on

Date of Conference:

2-4 April 2008