Intelligent Controller Based Feed Forward Control for AC to DC Converter PWM strategy With Reduced Switching Loss

Abstract

A single-stage power factor correction (PFC) converter for feeding a bidirectional AC/DC converter. A simplified pulse width modulation (PWM) strategy is used for the bidirectional ac/dc single phase converter in a microgrid system. Then, the operation mechanism of the novel simplified PWM is clearly explained. The number of switching’s of the simplified PWM strategy is one fourth that of the unipolar PWM and bipolar PWM. Based on the novel simplified PWM strategy, a feasible feedforward control scheme is developed to achieve better rectifier mode and inverter mode performance compared with the conventional dual loop control scheme. The requirement of continuous and controlled flow of voltage has met with the support of fuzzy logic controller and the capacitors present with the schematic design helps this requirement to be met in an efficient way. The conduction losses are reduced by using fuzzy logic controller in closed loop condition which reduces the switching losses and increases the output energy and the total harmonic distortion will be reduced. The proposed fuzzy logic controller based converter is implemented in MATLAB simulation platform and the output performance is analyzed.