Investigation on Performance of Controllers for Three Level PFC Converter for Wide Operating Range

Abstract

Single-phase single-stage three level AC-DC power factor correction converters are commonly used as switch mode power supplies in telecommunication systems to provide effective power conversion with good operating performance. This paper deals with the comparative analysis of the converter response with four different control techniques, namely proportional integral and derivative controller (PID), fuzzy Logic controller (FLC), sliding mode controller (SMC), and average current controller (ACC) for wide operating conditions. Necessary analytical equations are derived to observe the dynamic behavior of the converter. Simulations are done with MATLAB/Simulink, and the responses of the PID, FLC, SMC, and ACC are compared for line and load regulations. It is observed that the average current control technique yields better transient and dynamic response than the other three control techniques. The effective performance of the ACC is validated through experimentation.

Keywords

• fuzzy control
• pi control
• sliding mode control
• switching converter
• system performance