Development of Virtual Inertia Control with State-of-Charge Recovery Strategy Using Coordinated Secondary Frequency Control for Optimized Battery Capacity in Isolated Low Inertia Grid

Integrating renewable energy through inverter-based generators has decreased the power system’s inertia. Reduced inertia may lead to frequency instability during imbalance disturbances, particularly in an isolated system with limited The Battery Energy Storage System (BESS) and a virtual (VI) emulation control have become popular mitigate this issue. Nonetheless, BESS utilization for VI is highly dependent on availability of capacity, which affect cost. Therefore, developing strategy that requires less can recover state charge (SoC) desired level optimize required. This paper proposes SoC recovery coordination generators’ secondary control. Instead relying frequency, such as conventional approach, controlled signal also includes SoC. Hence, contribute lowering required recovering results show proposed method outperforms by requiring around 36% lower ability maintain