Improved Control Strategy Based on BM Theory for Grid Forming Type VSG System

In view of the problem that the grid-connected system of three-phase two-level inverter using silicon carbide is susceptible to power disturbance and the system lacks frequency inertia support ability, which seriously affects the stable operation of the grid-forming system, In this paper, based on the traditional virtual synchronous generator (VSG) system, combined with the Brayton-Moser (BM) control model, a new controller composition is designed to improve the VSG system. Combined with the advantages of the BM controller, the improved VSG system has a certain power anti-interference ability and a more sufficient grid frequency inertia margin. Finally, using Matlab to verify the effectiveness and superiority of the improved VSG system.