Decoupled power-based sliding mode control modeling enhancement for dynamic stability in doubly-fed induction generator-based wind turbines.

• Decoupled power-based sliding mode control modeling strategy was developed for uncertain parameters and chattering problems in DFIG. • The rotor electromotive force model was developed to provide dynamic stability in DFIG. • The stator electromotive force model was developed to improve the performance of the simulation study. • The developed models were examined via balanced and unbalanced fault analyses. Low-voltage ride through (LVRT) capability is the principal method used to counteract voltage dips and over-current, which are caused by various balanced and unbalanced faults. However, in providing LVRT capability during faults, oscillations that occur in parameter changes should be damped for a short time. In this study, a decoupled power-based sliding mode control (SMC) in doubly-fed induction generator (DFIG)-based wind turbines was developed in order to eliminate the oscillation problems that may occur during balanced and unbalanced faults. Besides, while the stator electromotive force model in DFIG is developed with the aim of improving simulation performance and enabling ease of calculation, the rotor electromotive force model is developed to dynamic stability in the system during various faults. The results obviously indicated that the proposed decoupled power-based SMC and stator-rotor electromotive force models enhanced the LVRT capability of the grid-code requirement and quickly restored dynamic stability to the system. [Display omitted] [ABSTRACT FROM AUTHOR]