Turkish Journal of Electrical Engineering and Computer Sciences




In this paper a new robust direct torque control strategy based on second order continuous sliding mode and space vector modulation of a doubly fed induction generator integrated in a wind energy conversion system is presented. The conventional direct torque control (C-DTC) with hysteresis regulators has significant flux and torque ripples at steady-state operation and also the switching frequency varies in a wide range. The proposed DTC technique based on second order continuous sliding mode control reduces flux, current, and torque ripples. It also narrows down the switching frequency variations in induction machine control. Two different sliding surfaces such as flux and torque sliding surfaces are used to control them. The error between reference and actual values are driven to respective sliding surfaces where the error is enforced to zero. Simulation results show the effectiveness of the proposed direct torque control strategy comparatively to the C-DTC one.


Doubly fed induction generator, wind turbine system, direct torque control, second order continuous sliding mode

First Page


Last Page