A Multisource Five-level Inverter Using an Improved PWM Scheme

This paper presents a single-phase multisource five-level inverter topology for grid-connected systems with an improved pulse width- modulated (PWM) scheme. A PV panel, an AC source and a DC source are cascaded together in parallel configuration and connected to a five level inverter to produce an output voltage in five levels. Two reference signals that were identical to each other with an offset were used to generate PWM signals for the switches. Digital Proportional-Integral Current Control Algorithm is used to implement this PWM switching scheme