Oscillation Characteristic Analysis and Wind-Storage Control of Wind Farms with Energy Storage Participating in Primary Frequency Regulation

Inhalt:
The increase of wind power permeability weakens the inertia level of the system and brings great challenges to frequency stability. The frequency stability of the system can be improved by combining energy storage and fans to participate in the primary frequency modulation of the power grid. The current research is mainly focused on the influence of different parameters on the oscillation characteristics of wind power grid-connected system under only wind turbine grid-connected, without considering the changes of system stability under the participation of wind turbine itself in frequency regulation and energy storage system access. Therefore, this paper analyses the influence of different parameters on the oscillation characteristics of the AC outgoing system of the wind farm with energy storage participating in primary frequency regulation, and designs two control methods, wind-storage independent frequency regulation and wind-storage coordinated frequency regulation, and compare and analyse the influence of the two control methods on the system stability. The results show that the proposed method can effectively improve the frequency stability of the system, and the effect is better when the wind-storage coordinated frequency regulation control is adopted.