Wind-Storage Cooperative Frequency Control Strategy Based on Wind Turbine Frequency Regulation Capability

As renewable energy, particularly wind power, continues to make up a larger share of power generation, the variability and intermittency of these sources pose significant challenges to maintaining grid frequency stability. Traditional methods of frequency regulation struggle to adapt to the fluctuating output of wind turbine generators (WTG), which can lead to inefficiencies and increased mechanical wear on equipment. This paper addresses these issues by proposing a novel cooperative control strategy for frequency regulation based on a combined wind-storage system model. The proposed strategy maximizes the frequency regulation potential of wind power while ensuring that the battery energy storage system (BESS) seamlessly takes over frequency regulation responsibilities during periods of low wind power output. This approach follows relevant national standards and provides a more flexible, efficient solution for handling the dynamic nature of renewable energy. Simulation results under varying load conditions demonstrate the superiority of this method over conventional approaches. The strategy effectively stabilizes grid frequency, reduces mechanical stress on WTG, and optimizes BESS utilization. Overall, this cooperative control strategy offers a robust solution for enhancing the stability of power systems with a high penetration of renewable energy sources.