Application of fuzzy control for smart charging of electric vehicles

This paper proposed smart charging management for electric vehicles (EVs). According to the battery state-of-charge (SOC), charging period and transformer loading, a smart charging method was designed by using fuzzy theory to control charging station when quickly or slowly charging mode is needed. To verify performance of proposed method, the commercial customers were selected on distribution transformer and considering transformer loading to set charging mode on each charging station to prevent transformer over loading when all of EVs are in charging. Finally, the proposed method can ensure all of EVs are full charge and enhance power quality and efficiency of distribution transformers.