Designing a multi charging station for Electric Vehicles and its utilization for the grid support

A new method of charging the Electric Vehicles (EVs) at the charging station (CS) has been proposed. A CS modeled in this work is a place where EVs of a particular area will come together to charge their batteries in accordance to grid norms. A sufficiently large number of aggregated parked EVs in a CS could provide several important services to the grid such as voltage regulation, peak power shaving, spinning reserve and other ancillary services. In this paper, a multi charging station (MCS) located at three different places under a single power distribution node has been modeled. Furthermore, Vehicle owner´s preferred minimum state of charge (SOC) and maximum allowable charging/discharging rate (C_rate) has been taken into account while delivering power to the grid. Based on the qualitative description of the MCS, a fuzzy logic controller (FLC) has been developed to control the flow of power between the grid and the EV´s battery. Finally, the MCS developed is verified on a typical distribution network of a city and mainly the voltage stability and peak shaving is presented.