提升模块化重力储能电站：一种优化机组容量配置的混合策略

Abstract The large-scale integration of intermittent renewable energy sources poses significant challenges to grid flexibility and stability. Gravity energy storage offers a viable solution for high-capacity, long-duration, and economical energy storage. Modular gravity energy storage (M-GES) represents a promising branch of this technology; however, the lack of research on unit capacity configuration hinders its widespread adoption. This paper presents a pioneering investigation into the optimal capacity configuration of the motor system in M-GES power plants, which is crucial for stable operation and cost efficiency. We introduce a hybrid capacity optimization strategy that combines equal capacity configuration (EC) and double-rate capacity configuration (DR). Using the MATLAB/Simulink platform, we validate the power characteristics of the M-GES power plant under this new strategy, demonstrating that the power deviation remains within 0.1 %. Notably, the Hybrid configuration can reduce the total cost of the motor system by 50 % to 80 % compared to the traditional EC approach. This research provides significant insights to support the commercialization of M-GES technology.