Research on the integrated application of battery energy storage systems in grid peak and frequency regulation

To explore the application potential of energy storage and promote its integrated application promotion in the power grid, this paper studies the comprehensive application and configuration mode of battery energy storage systems (BESS) in grid peak and frequency regulation. Based on the performance advantages of BESS in terms of power and energy response, integrated multiplexing of peak and valley filling (PSVF) application on long-time scales and frequency regulation (FR) application on short-time scales are explored. First, the theoretical feasibility of its comprehensive multiplexing application is explored from technical and economic perspectives. Then, the requirements of both models for decoupling and coupling are analyzed, and their specific composite control strategies and implementations are discussed in further detail. Finally, based on a techno-economic evaluation model, the effectiveness of each control strategy was simulated and evaluated to find the optimal BESS control and configuration in the combined application of PSVF and FR. Thus, it provides theoretical and technical support for the functional reuse of BESS in engineering practice.