MULTIFUNCTIONAL BIDIRECTIONAL ELCTRIC VEHICLE CHARGER-A DC SWIFTLY CHARGING ARCHITECTURE

Abstract

The growing prevalence of Electric Vehicles (EVs) has prompted an exploration into their viability as energy storage units within microgrids. This study aims to investigate the utilization of stationary EVs for effective surplus energy storage, employing bidirectional charging technology and employing Fuzzy Logic Control (FLC) for analyzing the charger's performance. The implementation involves DC rapid charging technology, capable of providing high power levels ranging from 120 to 240KW for level 3 fast charging, establishing a connection between EVs and a DC microgrid. To enhance the dynamic performance of the (V2G-G2V) charging stations, soft computing techniques such as fuzzy logic-based control and Proportional Integral (PI) control systems are employed. A comparative analysis of the two control systems, Fuzzy Logic Control and Proportional Integral Control, is conducted, focusing on their charging speeds in V2G and G2V modes. The simulation models are intricately designed to assess both V2G and G2V modes, resulting in a notable reduction in Total Harmonic Distortion (THD) generated by grid-injected current. This reduction in THD, a significant marker of active power management, is exemplified by the impressive decrease from 0.09% to 0.02% through the application of fuzzy logic control. These outcomes underscore the potential for both efficient and dependable operation of the proposed system.