Abstract: The integration of wind power and energy storage systems can significantly improve the grid’s active support capacity, effectively addressing the requirements of primary frequency regulation for the power grid. Taking the DFIG and BESS as examples, a control strategy of optimizing the frequency and peak regulation effect of energy storage stage string control is proposed based on the frequency regulation capability of the system under varying operating conditions. Considering the controller parameter variables, an energy storage stage string controller is designed to achieve reasonable system power allocation and enhance primary frequency regulation capability of the wind power and energy storage integration system under varying operating conditions. Finally, the efficacy of the suggested approach is validated through experiments conducted on the MATLAB/Simulink simulation platform. The system frequencies of traditional PI control and current mainstream active disturbance rejection control assisted frequency modulation are compared, and the results demonstrate that the proposed energy storage cascade frequency regulation control strategy can significantly improve the frequency regulation capability of the power system.