Assuming that all electric vehicles integrated to the grid are managed by aggregators, this paper proposes that the charging load of each EV aggregator can be dispatched within the unit commitment model taking the controllability of the charging of EVs at each dispatched time period into consideration. This can be accomplished by assessing the upper and lower limit of charging load of each EV aggregator based on the grid connected EVs scenarios simulation using Monte Carlo method. A unit commitment (UC) model is proposed for optimal coordination of wind power generation and charging load of EV aggregators. Cases study show that with the proposed UC model the wind abandon can be decreased as well as the cost of operation effectively.