Small-Signal Modeling and Stability Analysis of Grid-Forming Wind Farms Integrated via Fractional Frequency Transmission System

The grid-forming wind farm integrated via fractional frequency transmission system (GFM-WF-FFTS) represents an emerging grid-connection paradigm, providing a novel approach for large-capacity, long-distance offshore wind integration. Currently, small-signal modeling analysis of GFM-WF-FFTS requires urgent investigation. This paper establishes a small-signal model for GFM-WF-FFTS, comprising the gridforming wind farm, fractional frequency transmission line, and modular multilevel matrix converter (M3C), and conducts stability analysis of the interconnected system. The research findings presented in this paper establish a crucial foundation for ensuring the stable operation of GFM-WF-FFTS.