Improving the Synchronous Stability Control Strategy of Virtual Synchronous Generators

Abstract The microgrid dominated by new energy has small inertia and weak damping, while a virtual synchronous generator (VSG) is an effective means to enhance damping improve the stability of microgrid. However, it also introduces power angle oscillation problems similar that machines. This paper based on current inner loop voltage outer control three-phase LCL inverter. It coefficient generator, achieving good grid connection effect. While significant change in active occurs, system can lose synchronization stability. Therefore, proposes improved strategy for generators introducing frequency-proportional integral feed-forward link reactive suppress Theoretical analysis was conducted case sudden changes load. effectiveness verified through simulation.