Pitch Deloading Method of Wind Farm for Optimal Frequency Control Performance

As wind power is integrated into the power system, it poses challenges to frequency stability. Wind power needs to participate in frequency regulation, and reserving power is found to be an effective method. However, the amount of excessive or insufficient power deloading affect the economics and requirements of PFR. On the other hand, different power deloading allocation among wind turbines of wind farm affect dynamic performance of PFR. This paper proposes an optimal allocation method for wind turbine reserves within the farm with the object of minimizing kinetic energy loss of wind turbines to improve performance of the farm during PFR. Furthermore, the pitch angle of each wind turbine is calculated through the analytical relationship between the power deloading. The simulation results demonstrate that this method can significantly improve the primary frequency regulation performance of the wind farm in the power system.