With the continuous increase of wind power penetration,the equivalent inertia and frequency regulation capacity of power systems are significantly reduced,leading to prominent deterioration of grid frequency stability.Traditional doubly-fed induction generators(DFIGs)operate in the maximum power point tracking(MPPT)mode without inertia support and active frequency regulation capacity,so they cannot independently participate in grid joint frequency regulation.Energy storage batteries feature fast response,yet they cannot be applied on a large scale alone due to constraints of capacity and cost.To address the insufficient frequency regulation capacity of wind turbines under different wind speeds and disturbance conditions,the coordinated frequency regulation optimization method for wind-storage systems is suggested.Combined with rotor kinetic energy characteristics and power safety constraints,a quantification method for the frequency regulation capacity of wind turbines and a dynamic frequency stability domain model are established.To address the fluctuation of the state of charge(SOC)of energy storage batteries,an SOC adaptive control strategy and a self-recovery mechanism for energy are proposed,which mitigate the overcharging and over-discharging of batteries.A dynamic coordinated frequency regulation strategy dominated by wind turbines and supplemented by energy storage batteries is constructed.The output power boundaries of wind turbines and energy storage batteries are dynamically divided via the stability domain,which improves the dynamic frequency stability of power grids with high wind power penetration.