Frequency Fuzzy Control Strategy for Coordinated Wind-Storage System Considering Energy Storage Capacity Optimization

The fast and flexible regulation characteristics of energy storage system make it have advantages in participating in system frequency control. Combining wind power and energy storage to form a coordinated wind-storage system can well improve the frequency stability of the system. However, considering the high energy storage investment cost, this paper establishes the energy storage capacity optimization model with the goal of minimizing the total cost of coordinated wind-storage system. Then, a fuzzy control strategy of dynamic frequency response of the coordinated wind-storage system is proposed, which makes full use of the active reserve margin of wind turbine and the limited capacity of energy storage equipment to realize the dynamic cooperative operation of wind power and energy storage. Finally, the simulation analysis of the proposed method verifies that the optimization of energy storage capacity has good economy and the control strategy has good frequency regulation control effect.