With the increase of wind power penetration rate

the traditional power grid dispatching model ignores the wind power output prediction error and threatens the system security.Therefore

the scheduling method considering the uncertainty of wind power output is proposed

which is beneficial to the large-scale application of new energy power generation.The uncertainty of wind power is corresponded by the interval prediction

a robust scheduling model is set up and the automatic power generation control（AGC） response of the unit is considered to cope with wind power output fluctuation and assure grid power balance.Then

on this basis

the economic optimization model is applied to optimize the economic cost of robust interval scheduling.In the economic optimization model the abandonment penalty and the load-switching penalty fee to the objective function is added.The firefly algorithm is adopted to optimize the generation plan of generating unit so to reduce the total cost of the grid.Finally

the 10-unit example and the 134-unit actual grid are used to compare and analyze the two scheduling modes.The robustness and economic performance of this scheduling model are verified.