The implementation of EV charger scenarios requires to choose the type of the charger. The EV charger used in this study was DC fast charging level 2. The DC level 2 can charge EV with charge rate between 200-450 VDC and up to 90 kW. The charging time is about 20 minutes to fully charge the battery. However, the charging rate used in this project of the DC level 3 was 150 kW for one vehicle and DC level 2 75 kW for two vehicles as explained in the datasheet part. Also, all EVCS’s are uncontrolled charging rate, and the highest charging rate was 150 kWh. Also, this project studies the worst case of charging EV at noontime, where the peak load of the power system during workdays.

The calculation of determining the quantity of EVCS at used buses in the QU network is shown in Table 1. The calculation commenced by finding the spare capacity of the substations that will feed the EVCS, and it has been allocated 70% of the extra power of the substation.

The number of EVCS at each bus is a ratio of 70 % of the spare power of the substation and the charging rate of the selected charger. As selected previously, CPC150 Charger selected as the DC level 2 with a maximum charging rate of 150kW. It is obvious that bus numbers 7 and 16 have enough spare capacity, which makes them attractive to serve a large number of EVCS.