Bidirectional High-Efficiency DC–DC Converter for Electric Vehicle Fast-Charging Infrastructure

Abstract

The fast pace of the EV (electric vehicle) uptake has added to the pressure on effective and reliable fast-charging infrastructure, in which voltage conversion efficiency and bidirectional energy flow are key issues. Traditional fast-charging systems are known to experience massive switching losses, low voltage regulation, and low vehicle-to-grid (V2G) functionality. This paper aims to discuss these problems by offering a high-efficiency bidirectional DC – DC converter that will be used in EV fast-charging. In the proposed converter, a traditional proportional integral (PI) control plan will be used to provide stability in voltage regulation and smooth two-way flow of power either way through the grid and the EV battery. An elaborate mathematical model and simulation based analysis are designed to measure the performance of the system to work in different operating conditions. The findings show a significant enhancement in conversion efficiency that reached the highest efficiency compared to traditional designs and reduction in power losses. The converter, besides this, has stationary dynamic behaviour and low voltage ripple as well as rapid response during mode switching. The suggested system both grid-to-vehicle (G2V) and vehicle-to-grid (V2G) functionality, which is why it is applicable to the current smart charging infrastructure. The research on the whole emphasises the usefulness of a straightforward but powerful control strategy in increasing the effectiveness, stability and the feasibility of the bidirectional DC DC converter to EV fast-charging systems.