This article explores the structural design, operational principles, and advanced control strategies of large-scale energy storage battery systems in secondary frequency regulation. Summary: Frequency regulation is critical for maintaining grid stability, and energy storage systems (ESS) have become indispensable tools for balancing supply-demand mismatches. We developed a multi-agent deep RL framework using the Deep Deterministic Policy Gradient algorithm with the Adam optimizer, integrating operational characteristics. s moment,namely: (9) P agc,k = ? P U,i,k +? P B,j,kWhere Pagc,k is the AGC frequency regulation comma adaptively re idate DESs" frequency regulation services. Like current performance-ba stant of governor and turbine respectively. Second, the power control. To address this issue, this study proposes a virtual inertia-based control strategy for hybrid wind–storage systems, formulated through transfer function modeling of wind turbines, thermal generators, and energy storage units. By appropriately simplifying the dynamic characteristics of individual. Due to the ongoing reduction of power system inertia, maintaining operational frequency at its nominal value and minimizing tie-line power variations constitute essential variables for these improvements. A novel improved frequency stabilization approach based on modified fractional order tilt.