Modeling and Stability Analysis of Doubly-fed Induction Generator Based on Impedance Analysis Method for Voltage Source Control

Abstract

As the proportion of wind power increases, the proportion of synchronous motors in the grid decreases, which reduces the damping and inertia of the power system. At present, the main voltage source control adopts virtual synchronous control. This control strategy can effectively improve the inertia and damping of the system. In this paper, the impedance model of virtual synchronous generator controlled doubly-fed induction generator is established in the synchronous rotation coordinate system. Secondly, the effects of controller parameters and series compensation on system stability are analyzed by using generalized Nyquist criterion. Finally, the correctness of the theoretical analysis is verified by simulation results.