Study, analysis and simulation of three phase three-level, five-level and seven-level neutral-point-clamped inverters by PSIM

In this paper, a Pulse Width Modulation (PWM) control of multi levels inverters neutral-point-clamped (NPC) inverter is proposed. First, the structures of this power converter are presented. After that, a PWM control strategy is developed. Finally several electrical simulations were performed, using the software PSIM environment, to validate the theoretical analysis described previously. In particular, the three structures: three levels, five-level and seven-level inverters neutral-point-clamped (NPC) are studied.