A Novel Boost Active Bridge based Wireless Power Interface for V2G/G2V Applications

Distributed energy generation (DEG) solely based on renewable energy sources (RES) provides a promising solution to today's climate problems. However, DEG systems negatively impact grid stability. As such, researchers have proposed the utilization of electric vehicles (EVs) in order to improve grid stability through the provision of real and reactive power. Such schemes are known as vehicle-to-grid (V2G) or grid-to-vehicle (G2V), and often prefer a wireless bi-directional power interface between the grid and the EV battery. Wireless V2G/G2V systems proposed to-date employ three or more high-frequency power conversion stages to interface EVs with the utility grid. As a cost effective solution, this paper proposes a novel Boost Active Bridge (BAB) based wireless V2G/G2V interface, which only utilizes two high-frequency power conversion stages. The proposed converter also minimizes the size of passive components and offers an extra voltage boosting feature, in comparison to existing technologies. This paper provides a detailed description of the proposed system, introducing control techniques, which can be used to shape the input grid current, as well as regulate the power transfer. A steady-state mathematical model is presented together with simulation results to discuss the validity and feasibility of the proposed system as a low-cost and efficient wireless V2G-G2V system.