PWM Technique for Bidirectional AC/DC Converters with Feedforward Control in Grid-Linked Microgrid Systems

Abstract

This study presents a unique Pulse Width Modulation (PWM) technique for bidirectional AC/DC converters in grid-linked microgrid systems, intending to enhance overall system performance and stability. To seamlessly manage bidirectional power flow, microgrid integration into current power distribution networks requires complex control systems. Advanced feedforward control methods are incorporated into the suggested PWM system to overcome the problems caused by dynamic load changes and grid disruptions.

Bidirectional AC/DC converters are thoroughly analysed at the outset of the study, highlighting their critical function in microgrid functioning. There is a discussion of the inherent difficulties with bidirectional power flow, including the creation of harmonics and voltage swings. The study presents a high-performance PWM approach that maximizes converter performance in both the rectification and inversion modes to address these problems. The suggested method improves the converter's transient responsiveness and overall system stability by anticipating and mitigating disturbances with feedforward control. An actual microgrid situation is used to demonstrate the efficacy of the suggested PWM technique through the presentation of simulation results and experimental validations. Analyses that compare the suggested strategy to current PWM techniques show how much better it performs, particularly when load circumstances and grid disturbances change. As a valuable contribution to the field of power electronics and microgrid technology, the presented findings highlight the developed PWM technique's potential to significantly improve the operational efficiency and reliability of bidirectional AC/DC converters in grid-linked microgrid systems.