Optimal Load Control Method for Power System with Wind, Thermal and Storage Participating in Frequency Regulation

To address the limitation that traditional optimal load control (OLC) frameworks do not adequately account for the frequency support contributions of renewable energy sources, thermal power units, and battery energy storage systems (BESS), this paper proposes a coordinated multi-source OLC strategy. The proposed method incorporates the frequency response characteristics of wind power, thermal generation, and energy storage into the power balance equation, thereby enhancing system resilience against frequency disturbances. To alleviate the adverse impacts of frequent regulation of controllable load on user comfort and operational costs, differentiated frequency regulation dead-zone mechanisms are designed for various frequency regulation resources, and their effects on system frequency stability are systematically analyzed. Simulation results verify that the proposed strategy effectively coordinates multiple frequency regulation resources and significantly enhances system frequency stability and overall load control performance.