Effectiveness of BESS in Improving Frequency Stability of an Island Grid
Hung Cuong Nguyen, Quoc Tuan Tran, Yvon Bésanger
Abstract
The integration of Renewable Energy Sources (RES) into the power grid is limited by two inherent characteristics: intermittency and low inertia. These characteristics negatively impact system stability, particularly in terms of frequency stability. If the penetration of RES in a power system exceeds a certain threshold, the frequency stability of the system is compromised. This paper proposes and validates the effectiveness of combining Fault Ride Through (FRT) with Battery Energy Storage Systems (BESS) to address these challenges in various scenarios. Subsequently, the research employs the Particle Swarm Optimization (PSO) algorithm to determine the optimal parameters of both the BESS and Power System Stabilizer (PSS) for all the Synchronous Generators in a microgrid, achieving improved frequency stability. The results reveal the combined application of these two methods proves highly effective in enhancing system stability, even when RES account for 100% of the system's generation capacity.