The fast integration of large-scale wind power will result in serious impacts on the security and stability of grid and the acceptance of wind power eventually. In the absence of a significant improvement in the power network structure， scientific and rational principles and dispatch models can secure the wind power stable and maximum outputs. Based on the actual situation of Gansu power grid， the reasons of restricted wind power output are analyzed. The implementation details of the dispatching management rules are used to improve the quality of grid connected wind power. The biggest load mode is used to arrange the day-ahead generation dispatch， combining with the ultra-short-term rolling plan and real-time adjustment. By this way， the security and energy-saving of the power grid and the impartiality and openness of power dispatching are realized. Practical application verifies the feasibility of the proposed models and principles.