Abstract:
High penetration of distributed wind power introduces low inertia, high volatility, and strong nonlinearity into distribution networks, making conventional voltage control methods based on reactive power regulation insufficient to ensure dynamic stability. To address this issue, this paper develops a voltage–power coupling model and a small-signal dynamic model for distribution networks with distributed wind integration, and investigates the mechanism by which wind power fluctuations affect voltage stability. On this basis, a multi-timescale voltage stability control strategy considering the coordination of grid-forming control and hybrid energy storage is proposed. Specifically, a virtual synchronous generator is employed to provide active voltage support and inertia response, while a hybrid energy storage system is introduced to decompose and smooth wind power fluctuations. Furthermore, a coordinated optimization control framework integrating source, network, load, and storage is established. Simulation studies are carried out on the IEEE 33-bus distribution system. The results demonstrate that the proposed method can effectively reduce node voltage deviations, enhance system damping characteristics, suppress oscillations, and significantly improve voltage stability under high penetration conditions.