Switching Control of GSC of DFIGWTs for Disturbance Rejection Based on Bang–Bang Control

This letter proposes a switching controller (SC) for the grid-side converter (GSC) of doubly-fed induction generator-based wind turbines (DFIGWTs) to improve the disturbance rejection capability of the GSC based on bang–bang funnel control. A bang–bang funnel controller (BBFC) is designed and activated in the cases where the dc-link voltage of a DFIGWT is disturbed far away from its nominal value. A conventional vector controller (VC) is switched on operation when the tracking error of dc-link voltage converges within a prespecified error funnel. The BBFC and the VC constitute a SC. The disturbance rejection performance of the SC was tested through hardware-in-the-loop experiments.