Modeling and simulation of bidirectional AC-DC power converter

Abstract

Most existing power converters and motor drive systems draw non-sinusoidal currents from the power supply. Non-sinusoidal currents contain harmonics that disturb the power supply, which is of serious concern. Other equipments that use the same power supply are adversely affected. This project investigates the operation and performance of a new AC-DC converter that allows bi-directional power flow, provides improved input power factor, and reduces harmonic magnitude and disturbance to the power supply by system. The bi-directional feature allows recovery of regenerative energy of loads, back to the power supply and hence the converters increase overall energy efficiency. The proposed converter has high potential for industrial applications, such as electronically controlled robots, lifts and general industrial motor drive systems.