In order to obtain the optimal power scheduling scheme of the wind farm, the input value of the wind speed at any time must be mastered, and then the output power of each wind turbine was obtained. When the measuring instrument of wind speed fails to work properly, the wind speed data of the wind turbine would be wrong or missing. The equation of linear regression was established to find out the relationship among the input wind speed of every unit which could get the wind speed value. When idling abandoned wind occurd in the wind field,the power command would be issued by the grid management department. And the wind farm would produce the active and reactive power with the specified size. Taking the minimum loss of all doubly fed induction generator in wind farm as the objective function, the scheme of active and reactive power dispatch was determined. The model of wind field was established by software MATLAB, and the simulation results verified the feasibility of the scheduling model.