Modeling and Nonlinear Backstepping Control of a Single-Phase Bidirectional BEV Charger for Vehicle-to-Home Applications

Vehicle-to-Home (V2H) technologies provide a way for battery electric vehicles (BEVs) to act as a means of transportation as well as to serve as distributed energy sources to assist in meeting the electricity needs of homes. The modeling approach and the development of nonlinear control strategies for a bidirectional single-phase BEV charger are detailed in this paper, which has been designed for use in V2H applications. The topology developed incorporates both AC-DC and DC-DC power conversion stages connected to a high-voltage electric vehicle (EV) battery. Using the modeled system and a nonlinear backstepping control strategy, the proposed architecture regulates the DC-link voltage for reliable battery operation and provides high-quality sinusoidal voltage to the home loads. Furthermore, this control strategy will enable grid-to-vehicle (G2V) charging with a unity power factor. Stability and effective power transfer during charging and discharging operations have been observed in simulation results, indicating that the proposed topology has merit for the future of residential energy management applications.