Small-signal stabillity analysis of flux-controlled grid-forming DFIG under weak grid

作者：Wenhe Wang, Yufei Hu, Weibing Li, Xiaojun Hua, Xiaoming Zha, Zhen Tian · 发表于：IET conference proceedings. · 年份：2025 · DOI：10.1049/icp.2024.2443 · 被引用次数：1 · 研究领域：Power Systems and Renewable Energy、High-Voltage Power Transmission Systems、Magnetic Bearings and Levitation Dynamics

With the continuous increase of global wind power installed capacity, the modern power system gradually shows the characteristics of weak damping, low inertia, and weak anti-interference ability. Aiming at the normal grid-connected wind tur-bine under weak grid conditions, the small signal stability of the flux-controlled grid-forming DFIG is analysed. Firstly, the small-signal model of the flux-controlled grid-forming DFIG is constructed based on the flux-controlled virtual synchronous generator control (VSG). Then, the eigenvalue analysis method is used to investigate the influence of different operating conditions and controller parameters on the small-signal stabilization of system. Besides, the dominant factors of low-frequency oscillatory modes are analysed based on the participation factor matrix. Finally, the safety and stability boundaries of each influencing factor are calculated by oscillation modal analysis, which provides guidance for the parameter design of the DFIG under weak grid.