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In this paper is presented a method for modelling and simulation in Simulink/Matlab environment of the single-phase diode clamped multilevel inverters and capacitor clamped multilevel inverters. The models presented are used to perform a harmonic analysis of the output voltage of these multilevel inverters. The command method used in this work is based on the sinusoidal PWM.
A method is presented to balance the two DC-link capacitor voltages for a three-level inverter. Previous work has shown that using the redundant states in space-vector PWM algorithm solves this problem, leaving lower order harmonics or using high switching frequency. Here, it is shown that, the redundant states can be used in selective harmonics elimination PWM in the case of multilevel inverters,...
Actual developments in medium-voltage drives aim at increasing the power capability of the PWM inverter. Parallel connection of power semiconductor devices permits increasing the output current, while series connected devices increase the output voltage. In either case are additional means required for balancing the current or voltage stress of the devices. The three-level neutral-point clamped (NPC)...
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