Primary frequency regulation supported by battery storage systems in power system dominated by renewable energy sources

In recent years, the transition process towards clean energy has caused many challenges to power systems, especially in the field of operation and power system control. Conventional generators, which have been providing ancillary services to maintain stability and reliability to the system, are being replaced by intermittent renewable generators. Therefore, maintaining system quality and stability in terms of power system frequency control is one of the major challenges that require new resources and system integration. Battery energy storage systems (BESSs), as fast-acting energy storage systems, with the capability to act as a controllable source and sink of electricity are one of the prominent solutions for system services. This study investigates the primary frequency control provision from BESSs to the renewable energy sources dominated power system. The simulation results for various cases have shown that integration of BESSs has significantly improved power system frequency stability.