EV Control in G2V and V2G modes using SOGI Controller

Abstract

Electric vehicle (EV) technology is developing at a very fast pace. The Vehicle to grid (V2G) and Grid to vehicle (G2V) technology enables bidirectional power transfer between an electric vehicle and the grid. It is an emergent area of research. In the G2V operation mode EV, batteries are charged from the grid. The energy stored in the batteries may also be supplied back to the power grid during the V2G operation mode, which helps in maximum demand saving, load balancing voltage management and improved system reliability. An onboard bilateral battery charger for EV is proposed in this research paper, with G2V and V2G applications. Bi-directional power electronics-based converter is interfaced between EV and the grid to provide G2V and V2G modes. A Second Order Generalized Integrator (SOGI) control technique is used to control the H-bridge inverter which shows stable steady state and good dynamic performance. The battery charging/discharging current and voltage are controlled using a PWM controller further effect of nonlinear load dynamics on the system performance is also studied. Exhaustive simulation study is performed in MATLAB/Simulink environment which is also reflected in this paper.