Online Electric Vehicle Charging Strategy in Residential Areas with Limited Power Supply

Electric vehicle (EV) demand is considerably increasing, aided by battery technology development and government policy support. Therefore, it is necessary to consider various charging infrastructures and secure sufficient power to support this. In several cities or countries, a large population lives in a small area, and the supply of large residential complexes such as apartments is common. Given that old apartments may not have sufficient power capacity, it is challenging to secure additional power for charging EVs. In particular, power shortages can intensify during high power usage, such as the summer season, and may become an obstacle to the spread of EVs. Therefore, an efficient charging strategy for residential complexes must be established under the condition of limited power supply. This study proposes two scheduling methods to optimally charge EVs in residential complexes considering limited power supply. The proposed scheduling algorithms are thoroughly examined through extensive simulations with parking data collected from real situations and are demonstrated to be effective for online EV charging systems.