A Systematic V2G Control Scheme Assisted by Negative Feedforward DC Voltage Stabilization for Frequency Response

This paper proposes a vehicle-to-grid (V2G) charging framework has been proposed in this paper owing to the optimal charging/discharging characteristics of the electric vehicles'(EVs) batteries with respect to the change in frequency in the grid. Since battery overcharging deteriorates its lifetime, the proposed charging framework ensures virtual tripping of the vehicles from the plug-in charging terminal once it is fully charged. Additionally, a faster DC bus voltage droop controller has been used for the voltage source converter (VSC) instead of the conventional low bandwidth PI controller to overcome the sluggish response. A negative feedforward signal alongwith the droop controller has been used to achieve DC voltage regulation. On basis of extensive simulation carried out in MATLAB/SIMULINK, the results demonstrate the effective performance of the V2G charging strategy as well as the faster performance of droop controller over PI controller.