Study of Vienna rectifier and a highly efficient single phase two stage inverter with low THD

This study proposes a new circuit consisting of a Vienna rectifier and a single phase two stage inverter. The inverter consists with a combination of sinusoidal pulse width modulation (SPWM) and a square wave along with grid synchronization condition. The simulation work of this circuit has been done using PSIM. The new technique revealed that the low ripple, low THD below 0.1%, low cost and simple control providing a improved power factor of above 0.94.