Inertia Response Control of Self-synchronous Voltage Source Doubly-fed Wind Turbines in the Whole Wind Speed Range

Growing installed renewable power capacity challenges power system frequency stability. Voltage source control enables wind turbines to support the grid frequency autonomously, crucial for new power systems. However, inertia response control primarily focuses on the maximum power point tracking stage, lacking systematic research on low-speed, high-speed, and constant power operation, which limits the effective use of the wind turbine's own resources. To address the problem, an inertia response control based on self-synchronous voltage source doubly-fed wind turbines in the whole wind speed range is proposed. The impact of the virtual inertia coefficient on the active power output is analyzed. Furthermore, an additional proportional control is introduced within the active power control loop, while a compound judgment method utilizing grid frequency variation rate and generator speed is employed to realize selective inertia response control. A simulation model of a 3MW doubly-fed wind turbine based on PSCAD was built to verify the effectiveness of the proposed control method.