In order to improve the acceptance level of wind power and solve the problem of automatic generation control included in wind power, by combining with the characteristic of large-scale wind farms group access to grid section, the paper formulates wind power cluster section active power control strategy, and amends its ctive power control delay based on active response characteristic, gets the calculate method of section margin. Then, it builds fracture surface self-adaptation control frame that facing cluster wind based on Cyber-Physical Systems framework, and complish the optimizing of active power control strategy based on dynamic section margin calculation structure. Simulation results show that, the design method in this paper can reduce the wind turbine wear and operation cost, provide a guarantee for the wind farm output regulation rate, and reduce the output overregulation at low wind speed.In addition, the capacity of wind power can be fully utilized to reduce the line loss of cluster active power, and the economic benefit is obvious.