An improved fault control strategy for virtual synchronous generator with the coordination of STATCOM during unbalanced fault

The virtual synchronous generator (VSG) is a good solution for stabilizing the power system with high penetration of renewable energy. However, in case serious unbalanced voltage disturbance/fault, conventional VSG may lose voltage, inertia, and damping support characteristics to grid even can cause disconnection This paper proposes an improved fault control strategy coordination STATCOM. proposed method provide sufficient while keeping continuous inertia under severe fault. In paper, STATCOM topology based on positive negative sequence current are first so as keep during Secondly, introduced, which achieve multiple objectives, terms support, limitation, active output simultaneously. Then scheme developed optimize maximum objectives all possible scenarios, especially Finally, effectiveness verified by using MATLAB/SIMULINK simulation platform.