Efficacy of hysteresis current control in the single-phase vienna rectifier topologies for improved power quality

The Vienna rectifier is a unidirectional boost type improved power quality ac-dc converter (IPQC). The rectifier topology is capable of providing a dc output voltage that is higher than the ac source voltage with improved power factor. The topology is compatible with the hysteresis current control (HCC) technique. It has the capacity to provide almost unity power factor with low current distortion at the ac utility and a fairly well regulated voltage with low ripple content at the dc output. In this paper, the HCC technique is implemented in the single-phase Vienna rectifier topologies with the ac source at two different voltages and frequencies, and the power quality indices have been estimated using MATLAB simulations. The simulation results suggest, the topologies with HCC provide ac to dc power conversion in compliance with contemporary power quality norms.