Battery Energy Storage System for Frequency Control in Power System

The demand for frequency regulation services has expanded in recent decades in line with the unprecedented degree of penetration of renewables into energy systems. Simply increasing the capacity of conventional generators may not be a viable approach for providing frequency regulation services immediately due to the limited rate of decline and economic limitations of conventional generators. In some renewable energy integration projects, battery energy storage systems have been widely used as a promising approach for frequency management. Renewable energy's higher penetration in power systems usually displaces conventional synchronous generators. As a result, when an imbalance occurs in load generation, the inertia of the power system decreases, resulting in higher frequency deviation and potential system instability. In this paper the ability of BESS to provide virtual inertia and contribute to system frequency management is studied and validated using operations. The simulation is on a two-zone linked power system.