Autonomous electric vehicle charging management over real time digital simulator

Electric vehicle integration into the distribution system has been a topic of great interest lately due the potential challenges it poses. Previous works have focused on either centralized charge control or distributed charge control to solve these issues. In this paper, a voltage feedback control structure for EV charging is tested that, unlike other proposed methods, does not require any real-time communication between the EV and the utility. This control structure compares the system voltage at the point of charging with a reference voltage and takes into account the EV battery state of charge (SOC). Simulations are performed using a Real Time Digital Simulator (RTDS). The results show that this method can successfully reduce EV charging to eliminate system voltage violations that would otherwise be caused from EV charging while ensuring fairness among the various EVs. In addition, these results demonstrate the effectiveness of the proposed approach in flattening the distribution feeder´s load profile.