System Distributed Frequency Response Model for Wind Turbines with Active Frequency Support

With the continuous integration of high-proportion renewable energy sources, the diminishing inertia of the power system has brought the frequency stability issue into sharper focus. Wind turbines equipped with active frequency support can enhance the system's frequency regulation capability but also introduce spatially uneven distribution of the system's frequency response. To analyze the spatial distribution characteristics of the system's frequency after disturbances, a system distributed frequency response (SDFR) incorporating active frequency support wind turbines is proposed. Initially, active frequency control strategies for wind turbines under different wind speeds are presented, establishing a system frequency response model applicable across all wind conditions. Subsequently, utilizing the K-means clustering method, the power system is distributed into several regions, with regional frequency response models constructed accordingly. Then, by utilizing transmission line power as a medium, the frequency response models are integrated to form a SDFR model incorporating active frequency support wind turbines. Finally, simulation examples are developed on the Matlab/Simulink to analyze the system's frequency response under different disturbance scenarios. The results demonstrate that the SDFR model incorporating active frequency support wind turbines accurately captures the frequency response characteristics of various regions following disturbances.