Optimal Primary Frequency Regulation Control Strategy for Wind Farms to Prevent Secondary Frequency Drop

Abstract

As the share of wind power in the power generation structure increases, the demand for effective frequency regulation using wind turbines also grows. Wind turbines typically participate in frequency regulation by reducing rotor speed. However, extended operation at low speeds can lead to efficiency losses, which necessitate measures to disengage from frequency regulation. Additionally, actively disengaging wind turbines from frequency regulation may give rise to secondary frequency drop issues. To address this challenge, this paper proposes an optimized frequency regulation control strategy for wind turbines. Firstly, this paper analyzes traditional frequency regulation strategies and adjusts the parameters to address the issues of rapid energy release and frequency fluctuations in virtual inertia control. Secondly, an active disengagement strategy is introduced to reduce reliance on traditional frequency regulation parameters. Furthermore, the disengagement of droop control in frequency regulation is a key factor contributing to secondary frequency drops. In this paper, by adjusting the droop parameters, wind turbines can automatically disengage from frequency regulation in the later stages, thus preventing secondary frequency drops. Finally, simulation results show that integrating the adjusted parameters into comprehensive inertia control effectively demonstrates the validity of this approach