Analysis of impact of electrical vehicle charging on low voltage power grid

Charging electric vehicles, especially if carried out without any coordination, can cause significant voltage variations on some existing distribution networks in low voltage. Especially because the latter are not designed to take account of a strong variability of the loads, both in charging, but in some cases also in the generation, if the vehicle is supposed as an energy storage element. In this work the simulation and analysis of these phenomena are performed using a test network that describes a European low voltage network and has recently been published as IEEE test power supply. The proposed approach involves the integration of a bottom-up model of the loads prediction, combined with a model of the distribution of vehicles which takes account of an actual use, in order to determine the state of charge.