Coordinated Charging Strategy of Electric Vehicles using Receding Horizon Technique to Maintain the Power Quality of Distribution Grid

Abstract

The growing number of Electric Vehicle (EV) connections to the distribution grid has enhanced the electric load demand and decreased the power quality (PQ) of the distribution network (DN). Therefore, this research work presents a charging control strategy (CCS) of EVs while maintain the power quality (PQ) in distribution grid. The CCS comprised of two stages a Primitive Schedule of Charge (PSC) and a Charging Coordination in Real Time (CCRT). A multi objective optimization problem has been formulated to develop charging strategy. Receding Horizon Technique (RHT) has been used to determine the optimal values of charging power for the 48 time horizons to address the needs of EV owners and to improve the PQ of the DN. To establish the robustness of the proposed approach, simulation has been carried out considering IEEE 33 bus and IEEE 69 bus radial distribution system. The results of the case study indicates that CCS can satisfy the preferences of all connected EVs prior to the end of the charging time horizon while maintaining the PQ of the distribution grid. Specifically, the CCS can provide affordable and dependable EV charging for EV owners while maintaining PQ voltage deviation limitations. In addition, a cost analysis of charging EVs revealed that demand was met at a lower cost than in the absence of CCS.