As wind power penetration increases, the number of units participating in frequency regulation systems gradually decreases. The decoupling of wind turbine speed from grid frequency leads to a reduction in the system’s equivalent inertia, causing significant frequency fluctuations in the face of large disturbances. Existing frequency regulation methods have certain shortcomings: traditional frequency regulation units respond slowly; wind turbine frequency regulation is limited by its operating conditions and parameters; energy storage systems respond quickly and adjust smoothly, but frequent charging and discharging affect their lifespan. Therefore, firstly, by studying the virtual inertia characteristics of wind turbines and the droop characteristics of energy storage in low-inertia systems, a system frequency response model including wind-storage penetration is established. Secondly, by adopting different frequency regulation strategies with varying energy storage capacity ratios, the impact of perturbation control parameters on the frequency regulation effect of wind-storage systems is analyzed. Finally, based on different power disturbances, the frequency response curves of wind-storage systems are analyzed, and the simulation analysis verifies the importance of combined wind-storage frequency regulation.