Grid-connected energy storage plays a pivotal role in various aspects of grid management, including frequency regulation, peak shaving, deferring grid expansion, and enhancing overall grid stability.

Energy storage facilities have the capability to engage in ancillary services within the electricity market, such as frequency regulation, peak shaving, voltage stability, and black start, thereby reaping corresponding advantages. They can facilitate load shifting and fill demand valleys within regional power grids, thus postponing the need for distribution capacity expansion and enhancing grid utilization efficiency. Additionally, they facilitate the integration of renewable energy sources at both transmission and distribution levels, balancing power fluctuations between generation and consumption, ultimately leading to improved grid stability. Moreover, during power outages, energy storage systems can supply emergency power to users, preventing disruptions in electricity supply.