Mathematical Models and Modelling Methods for the DFIG-Based Wind Power System
摘要
In the DFIG-based wind power system, the stator of the generator is connected directly to the grid through a grid-connected switch, while the rotor of the generator is connected to the grid through a generator-side converter and a grid-side converter, which is illustrated in Fig. 2.1. Here, the generator-side converter is connected to the rotor and regulates the rotor current for generator control, and the grid-side converter regulates the DC-bus voltage, feeds the slip power into the grid and realizes the decoupled control of active and reactive power. A filter structure is usually found between the grid-side converter and the grid to suppress the harmonic currents caused by the grid-side converter.