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Distributed Hybrid Frequency Control of Large-Scale Interconnected Power Systems via Battery Integration

The increasing penetration of renewable energy sources in power grids highlights the role of battery energy storage systems (BESSs) in enhancing the stability and reliability of electricity. The application of decentralized control to improve the stability of a large-scale power system is inevitable, especially in distributed energy sources (DERs). A power grid is a strongly interconnected system; thus, the impact of each area on the decentralized control design needs to be taken into account. This paper presents an optimal distributed hybrid control design for the interconnected systems to suppress the effects of small disturbances in the power system employing utility-scale batteries. The results show that the smart scheduling of the batteries’ output reduces the inter-area oscillations and improves the stability of the power systems.