Fair Charging Service Allocation for Electric Vehicles in the Power Distribution Grid

Abstract

The increasing battery capacity of electric vehicles allows longer driving distances, but also requires longer charging times, so that European standard Schuko electricity socket-outlets at households (max. 3.7kW) are not suitable for full charge cycles over night. Private (semi-) fast wall-boxes often require enhancement of the power distribution system or otherwise partial overloading can occur in case electric vehicles charge simultaneously at the same area. This work proposes a dynamically weighted fair queuing algorithm, which can be applied to radial power distribution grids, for fairly allocating the available charging power capacity to ongoing charging processes. In contrast to other solutions, the fairness is based on the whole charging service, considering both, the required energy and the availability of the electric vehicle. The proposed algorithm is compared by simulation with statically weighted fair queuing, earliest deadline first and first come first serve charging power capacity allocation.