A smart charging station for EVs with evaluation of different energy storage technologies

Penetration of electric vehicles is fully dependent on on-site and on-time availability of charging facility. The charging stations are required to be deployed optimally so as not to overload the grid. In this paper, we evaluate energy storage system based charging station in order to avoid strain on the grid due to additional load of e-vehicles. The aim is to ensure grid stability delivering a certain level of quality of service to e-vehicles owners. We consider two different possibilities to recharge the vehicle; either drawing power from power grid or recharging through energy storage system. An optimum operating condition is identified by comparing diverse system parameters. The proposed charging facility does not only ensure on-time relatively fast charging but it also helps reduce stress on the power grid by proposing average power demand by electric vehicles rather than considering peak power demand, at better economy maintaining a good level of quality of service. Simulation results evaluate performance of the proposed charging system in terms of operating efficiency of charging station and recharging time of EV.