Open AccessPower‐current controller based sliding mode control for DFIG‐wind energy conversion system
Author(s) -
Merabet Adel,
Eshaft Hisham,
Tanvir Aman A.
Publication year - 2018
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2017.0313
Subject(s) - control theory (sociology) , stator , robustness (evolution) , induction generator , wind power , sliding mode control , engineering , ac power , robust control , turbine , control system , voltage , computer science , nonlinear system , physics , electrical engineering , control (management) , quantum mechanics , artificial intelligence , mechanical engineering , biochemistry , chemistry , gene
This study presents an overall sliding mode control scheme for stator power‐current control, grid power‐current control and dc‐link voltage regulation to operate a doubly‐fed induction generator (DFIG) based wind energy conversion system. At the generator rotor side, the stator power control is achieved through controlling the rotor currents. The rotor current state model is carried out from the stator and the rotor equations of the generator under the condition of stator voltage alignment. At the grid side, a cascade control loop is applied for the dc‐link voltage regulation and the power transfer using grid and dc‐link modelling. The structure of the sliding mode control law, combination of compensating, sliding and integral terms, enhances the tracking performance and the robustness to uncertainties. The proposed control strategy is validated using an experimental DFIG wind turbine system and the results are provided to demonstrate the capabilities of the proposed control system in tracking and control under different operating conditions and robustness to uncertainties.