Abstract: With the increasing of wind power penetration rate,more flexible ramping capacity is needed for the safe and stable operation of the power system,so it is proposed to let wind power provide flexible ramping capacity. The improved swinging door algorithm is used to identify the wind power ramp,and the wind power ramp is regarded as the advantageous resource to provide the flexible ramping capacity in the system. The optimal scheduling model of wind power providing the flexible ramping capacity is established. The simulation results in the IEEE-118 bus system show that the flexible ramping capacity provided by wind power can reduce the ramping capacity provided by conventional units,reduce cost and effectively improve the economy of system operation. It is verified that improving the accuracy of wind power prediction can effectively increase the flexible ramping capacity provided by wind power.