Load Sharing Control of Grid Forming Converter Based on Virtual Synchronous Generator

Virtual synchronous generator (VSG) is used to provide virtual inertia to the grid for the compensation of decreasing inertia with the increase of renewable energy. The virtual inertia of VSG can reduce the grid frequency variation in case of the load variation, and the conventional VSG controller contains PLL and droop control. This paper proposes a new control strategy without PLL to simplify the controller, and the proposed controller has the ability of providing both load sharing and inertia to the grid like the conventional VSG. The usefulness of the proposed controller is verified through simulations and experimental results.