Design of Control Parameters and Multi-objective Control Strategy of Virtual Synchronous Generator under Unbalanced Voltage

The virtual synchronous generator simulates the traditional synchronous generator to generate inertia and damping, and can provide voltage support for the power grid. It is widely used in the control of new energy grid connection. However, when the grid voltage is unbalanced, the output of the virtual synchronous generator Power quality can be severely affected. In order to improve the power quality of virtual synchronous generator output power under unbalanced voltage conditions, this paper proposes a virtual synchronous generator control method based on the combination of parameter selection and negative sequence current suppression under unbalanced grid voltage. Balance the suppression of negative sequence current under grid voltage conditions, and ensure the dynamic performance and stability of virtual synchronous generator control. Simulation and experimental results verify the effectiveness of the proposed method.