Container energy storage systems play a crucial role in grid frequency regulation, offering fast response, reserve capacity, and smoothing of renewable energy integration. As the demand for reliable and stable electricity continues to grow, the importance of these systems will. . y regulation (FR) of the power system to their rapid response and control capability. This review provides a structured analysis of four representative ESS types and emphasizes the growing importance of hybri ise from rapid fluctuations in solar insolation. During periods of diminished solar. . As global power grids shift toward renewable energy, maintaining frequency stability becomes increasingly complex. Traditional generation sources, such as coal and gas plants, provide natural system inertia, which helps dampen frequency deviations. However, with more solar and wind power integrated. . Grid frequency is a crucial parameter that indicates the real - time balance between the power generated and the power consumed in an electrical grid. When the demand for electricity exceeds the supply, the grid frequency drops; conversely, when the supply surpasses the demand, the frequency rises. . The strategy for frequency modulation control of energy storage assisted AGC (automatic generation control) systems with flexible loads was looked into from the viewpoint of source charge interaction in order to o. Frequency regulation — the process of maintaining the grid's operating frequency within acceptable limits — is essential to prevent blackouts, equipment failure, and. .