Integral Backstepping Control for Stability Enhancement of Doubly Fed Induction Generator

Abstract

Generally, wind farms are built in areas far away from demand centres and utility grids. Due to its benefits, the doubly-fed induction generator (DFIG) is currently the most widely used topology in wind energy conversion systems. Therefore, long transmission lines connect wind farms with the power grid, exposing DFIGs to severe grid faults. For these reasons, this work presents an efficient control method that uses the nonlinear integral backstepping control (IBC) technique of the DFIG to stabilize and improve the transfer power capacity of the system during several faults. Hence, the grid's voltage and current, rotor side converter (RSC) and grid side converter (GSC) currents controllers, dc-link voltage, and active and reactive powers are presented through Matlab/Simulink environment to prove the effectiveness of the suggested integral backstepping technique compared to the Proportional-Integral controller, specifically in terms of disturbance rejection, steady-state performance and dynamic response, stability and robustness against parametric variations.