Active Support Control Strategy of VSG-based PMSG with DC-Convergence Under Master-slave Control

Abstract

In order to provide the system with the inertia support through wind turbine rotor kinetic energy when the power of the power system fluctuates, the virtual synchronous generator (VSG) control strategy is adopted to the grid-connected inverter of the permanent magnet synchronous generator (PMSG), which can actively adjust the imbalance power caused by the system fluctuations, and provide the system with inertia support at the initial stage of system disturbance. And meanwhile a new parallel control method is proposed for wind turbines in this paper. The master-slave control strategy is adopted by the wind turbine machine-side converter, which can realize the collection and transmission of DC power, and reduce the number of inverters, save economic costs and avoid many problems caused by the connection of AC power. Finally, the performance and effectiveness of the proposed method are validated by the simulation results.