Research on Modeling and Coordinated Strategy for Island Wind-Hydrogen System

The power system in island electrification scenarios often exhibits weak grid characteristics, leading to frequency and voltage instability. Coordinated control of wind power and hydrogen energy operation is crucial for addressing this issue. In this regard, this paper proposes a grid-forming-based coordinated control method for island wind-hydrogen systems. By integrating hydrogen energy into the grid-forming control of wind turbines, the proposed method aims to suppress load fluctuations, enhance system frequency regulation capability, and consequently improve the frequency regulation and safety stability of the system. The paper first models the wind-hydrogen system in island scenarios, refining the traditional grid-forming control on the wind turbine side and proposing a grid-forming control strategy considering hydrogen energy output. Subsequently, to better achieve the frequency regulation effect of hydrogen energy, an adaptive primary frequency control strategy for hydrogen energy is designed to realize the coordinated control of island wind-hydrogen systems (WHFCS, Wind-Hydrogen System Coordinated Control). Finally, the system model is constructed using the RT-LAB real-time simulation platform. Through comparison and verification, the WHFCS strategy's impact on the frequency support capability of the wind-hydrogen system is validated. The results indicate the applicability of this control strategy for island wind-hydrogen systems under weak grid conditions, offering a novel solution to enhance the reliability and stability of such systems.