Abstract:

When compared to traditional internal combustion vehicles (ICVs), electric cars (EVs) are more environmentally friendly and offer a greater application potential for green mobility. However, due to the current state of battery technology, EV charging times are still longer than ICV refuelling times. In this paper, the authors propose an Urgency First Charging (UFC) scheduling policy, which orders EVs via their charging urgency (calculated by their charging demand and remaining parking duration). With the underlying UFC policy, this study further propose a reservation-based CS-Selection scheme that selects the optimal CS with the minimum trip duration (summation of travelling time through CS, and the charging time spent at CS), where the EVs would further report their reservations to help anticipate the service congestion status of CSs in future. The authors have conducted simulations through Helsinki's city traffic scenarios. The simulation results show that the proposed CS-Selection scheme has advantages in improving users quality of experience, which shortens the overall trip duration of EVs and fully charges more EVs before departure deadline.