Adaptive VSG Control Strategy for Photovoltaic‐Storage Hybrid Power Supply Systems

ABSTRACT When the virtual synchronous generator (VSG) control strategy is employed in a photovoltaic energy storage hybrid power supply system, system stability and dynamic performance tend to degrade under load disturbances due to fixed control parameters. To address this issue, this paper presents a photovoltaic energy storage power generation system incorporating an adaptive parameter VSG control strategy. Through the equivalent small‐signal model, the impact of inertia on system frequency and power is analyzed. Additionally, stability analysis, as well as parameter setting and design for the adaptive inertia and damping VSG control strategy, is conducted. Finally, the proposed adaptive VSG control strategy is applied to the photovoltaic energy storage power generation system, and its simulation model is developed. The simulation results demonstrate that, under load disturbances, the photovoltaic energy storage system utilizing the adaptive VSG control strategy exhibits superior stability and dynamic performance. Compared to the conventional VSG control strategy, the adaptive approach significantly reduces frequency and output power fluctuations.