Anti-windup predictive current controller applied to a DFIG-based wind turbine under low DC-link voltage

During unsymmetrical/symmetrical voltage sags, there is a drop in the DC-link voltage, thus it can lead to serious impacts, i.e. current and power oscillations, to a double fed induction generator (DFIG) with a simplified power converter (rotor side converter with three-phase passive diode rectifiers). Therefore, this paper deals with an anti-windup predictive current controller applied to a DFIG-based wind turbine under low DC-link voltage condition. In order to investigate the transient overshoots and ripples that appear in the rotor's current and DC-link voltage, several experimental tests are carried out. The test results shows the effectiveness of the proposed anti-windup predictive controller when it is compared to the PI controller.