Multicarrier PWM with DC-link ripple feedforward compensation for multilevel inverters

Samir Kouro, Pablo Lezana, Mauricio Angulo, José Rodriguez

Research output: Contribution to journalArticle

139 Citations (Scopus)


Like most power converter topologies, multilevel inverters are controlled with modulation techniques that are conceptually based on nonlinear waveform synthesis assuming constant dc-link voltages. However, real applications have load and supply dependent dc-links that usually present important low frequency ripple, which is also modulated and transmitted to the load, generating undesirable low frequency voltage and current distortion. This paper introduces a simple but effective dc-link ripple feedforward strategy into traditional carrier-based modulation techniques. The dc-link ripples are measured and used to modify the carriers or the reference directly in the modulation stage. Simulation and experimental results show the accuracy of the proposed method, eliminating low order harmonics in the load current. © 2007 IEEE.
Original languageEnglish
Pages (from-to)52-59
Number of pages8
JournalIEEE Transactions on Power Electronics
Publication statusPublished - 1 Jan 2008

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