A dual-statorwinding induction generator based wind-turbine controlled via super-twisting sliding mode

Abstract

The dual-stator winding induction generator (DWIG) is a promising electrical machine forwind energy conversion systems, especially in the low/mid power range. Based on previous successfulresults utilising feed forward control, in this article, a super-twisting (ST) sliding mode improvedcontrol set-up is developed to maximise power extraction during low wind regimes. To accomplishthis objective, via constant volts/hertz implementation, a ST controller was designed to command theDWIG control winding, such that the tip-speed ratio is robustly maintained at its optimal value. Theproposed super-twisting control set-up was experimentally assessed to analyse its performance andto verify its effciency in an actual generation test bench. The results showed a fast convergence tomaximum power operation, avoiding chattering and offsets due to model uncertainties.