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Voltage balancing method for a seven-level stacked multicell converter using minimum-switching transitions
Ghias, Amer M.Y.M.; Pou Félix, Josep; Agelidis, Vassilios; Ciobotaru, Mihai
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. TIEG - Grup d'Electrònica Industrial Terrassa
This paper presents a voltage balancing method for stacked multicell converters based on phase disposition pulse-width modulation. This method is based on minimizing a cost function to determine the optimum redundant state for capacitor voltage balance for each particular voltage level. The robustness of the proposed voltage balancing method is verified against static and dynamic unbalanced load conditions. Furthermore, a significant reduction in the switching frequencies of the power devices is achieved by using sawtooth carriers instead of standard triangular carriers without affecting the voltage balancing capability.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria electrònica
Electric current converters
Capacitors
Multilevel converter
Stacked multicell converter
Capacitor voltage balancing
Pulse-width modulation.
Ràdio--Freqüència modulada
Convertidors de corrent elèctric
Condensadors elèctrics
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