Energy Management of Ultra Fast Charging Stations

Abstract

Ultra fast charging stations enable the charging of electric vehicles under 15 minutes. Integration of the charging station with renewable source of energy and energy storage system alleviates the stress on the distribution grid during each charging process. The proposed energy management system ensures the coordinated response of the charging station assets to meet the electric vehicle demand while reducing the charging impacts on the grid. A day ahead rolling horizon energy management algorithm that updates the dispatch every five minutes is proposed which follows the change in the load and the renewable generation. Strategies and case studies considering variable renewable energy availability and electric vehicle load based on performance indices such as net energy imported from the grid, energy not met ratio, number of grid power violation events, and metrics for independence and self-consumption of renewable resources are evaluated, and data is presented.