Research on Virtual Synchronous Generator Control for Parallel Connection of Multiple Grid-Forming Energy Storage Converters

The parallel connection of converters facilitates the modularization of the operating system, making the internal structure of the system more flexible and variable. However, due to the low damping and low inertia characteristics of power electronic equipment, which may be certain risks when the energy storage system is connected to the power grid through a power conversion system. To address this issue, the control strategy based on virtual synchronous machine control technology for grid-forming energy storage converters is proposed, which can improve system inertia and damping. Secondly, the conduct research on the off grid control of grid type energy storage converters. Finally, the proposed control strategy was validated through simulation experiments.