An Approach for Power Factor Correction of Single-Phase Single-Stage Three-Level AC-DC Converter with Phase Shift Modulation

AC-DC power electronic converters are widely used for conversion of electrical power which is best suited for user loads can be utilized in many applications such as for telecom equipment, computer switched mode power supply (SMPS), electric vehicles, renewable energy resources. Traditional AC-DC converters generally have two conversion stages, an AC-DC front-end stage that operates with the function of correction of input power factor to ensure good power quality, and a DC-DC conversion stage that converts to the desired output DC voltage with continuous output current over a wide range of load variation. The AC-DC single stage converters that are based on multilevel (Three-level) circuit topology to increase the power handling capability of converter and to optimize the voltage stress on the switches have been proposed. The operation, features and simulation results obtained using MATLAB simulink software are also presented.