Fuzzy Based Energy Management System for a Micro-grid with a V2G Parking Lot

A fuzzy based intelligent energy management system (EMS) to utilize electric vehicle (EV) batteries for energy storage services in a micro-grid is proposed in this paper. A dc fast charging station is used to interconnect EVs to the micro-grid. The fuzzy logic controller determines the energy available with each EV to participate in vehicle-to-grid (V2G) and grid-to-vehicle (G2V) services, based on the battery state of charge, rated capacity and time remaining for departure of each EV. The EMS algorithm then allocates the balance power in the micro-grid to the available EV batteries without impairing the owner's driving needs. Different case studies have been simulated in MATLAB/SIMULINK environment by varying the load, generation and number of EVs available at the parking lot. The obtained results verify the effectiveness of the proposed approach in maintaining an optimal power balance in the system under different operating conditions.