RT Journal Article
T1 Switching Frequency Analysis of Staircase-Modulated Modular Multilevel Converters and Equivalent PWM Techniques
A1 Konstantinou, G.
A1 Pou, J.
A1 Ceballos, Salvador
A1 Darus, R.
A1 Agelidis, V.G.
AB The large number of voltage levels in a modular multilevel converter (MMC) make staircase modulation a feasible alternative, particularly in high-power applications. However, staircase waveforms do not necessarily mean operation of the MMC submodules (SMs) at the fundamental frequency. This paper presents an analysis of SM switching frequencies in staircase-modulated MMCs and their correlation to the modulation index and load phase angle. A carrier-based pulsewidth-modulation (CB-PWM) equivalent technique is also developed. This analysis demonstrates that CB-PWM techniques provide a similar switching frequency with superior harmonic performance and improved voltage balancing characteristics at all modulation indices compared to staircase modulation. The theoretical analysis is verified with extensive simulation results for MMCs with different SMs and experimental results from a laboratory prototype.
YR 2016
FD 2016-02
LA eng
NO Konstantinou , G , Pou , J , Ceballos , S , Darus , R & Agelidis , V G 2016 , ' Switching Frequency Analysis of Staircase-Modulated Modular Multilevel Converters and Equivalent PWM Techniques ' , unknown , vol. unknown , no. 1 , 7070753 , pp. 28-36 . https://doi.org/10.1109/TPWRD.2015.2416759
NO Publisher Copyright: © 1986-2012 IEEE.
DS TECNALIA Publications
RD 3 jul 2024