Design of an Efficient Bidirectional Buck Boost Converter for V2G and G2V Operation in Electric Vehicles

Abstract

Electric vehicles (EV) are an effective eco-friendly means of transportation due to the increased use of batteries for energy storage. Additionally, they connect with electricity grids by supplying power and managing the charging rate to achieve quicker charging times. Owing to their ability to operate in a Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) mode, electric vehicles can fulfil this task by supplying bidirectional power flow to tackle the various challenges associated with faster charging and introducing additional services to the grid. Maintaining a stable output voltage and current during the energy exchange process is a crucial factor in these systems. To overcome this challenge, the proposed system employs a bi-directional buck-boost converter (BBBC) with a sophisticated control strategy that considers the current State of Charge (SoC) of the storage system. This BBBC enables bidirectional energy transfer between the power grid and the vehicle's energy storage system, which is typically a battery. The output voltage and the corresponding current can be precisely regulated in accordance with the energy levels in the system using this strategy, ensuring a smooth and efficient energy exchange process.