Design of a modified Vienna rectifier for power factor correction under different three phase loads

This paper deals with the design of a modified Vienna rectifier for power factor correction under different three-phase load conditions. The whole system consists of a modified Vienna rectifier for converting AC power to DC, a controller for controlling modified Vienna rectifier, an H-bridge inverter, a dual stage buck converter and a T-LCL filter circuit. In this article, we proposed a controller for modified Vienna rectifier which is inferred to regulate the output DC voltage and pure sinusoidal three phase input current to achieve unity power factor. For switching technique of the inverter, a combination of square wave pulse and SPWM under grid synchronization is applied. The proposed system, which is simulated using PSIM software, provides low ripple, low input current distortion which is about 5.3% and simple control providing corrected power factor up to 0.998.