Commande vectorielle des onduleurs multi nivaux

Abstract

In this work, we have studied a three-phase multi-level inverter structure that reduces the voltage constraints on the power switches, regulates the output DC bus voltage and reduces harmonic currents at the input.Which makes it possible to improve the power factor of the power source with operation of a relatively large power. The control of this converter is ensured by the vectorial MLI technique which seems the most promising because it is well suited for a digital implementation and shows superior performances for this type of converters. The simulation study using the Matlab /Simulink software showed us that the vectorial MLI control technique developed in this work offers a high efficiency for the operation of this multi-level converter. This converter makes it possible to provide a stable DC voltage without harmonic pollution at its input.