Open AccessA new approach using combination of sliding mode control and feedback linearization for enhancing fault ride through capability of DFIG‐based WT
Author(s) -
Taher Seyed Abbas,
Dehghani Arani Zahra,
Rahimi Mohsen,
Shahidehpour Mohammad
Publication year - 2018
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/etep.2613
Subject(s) - control theory (sociology) , stator , rotor (electric) , fault (geology) , feedback linearization , engineering , low voltage ride through , induction generator , converters , matlab , inrush current , voltage , computer science , ac power , control (management) , electrical engineering , transformer , artificial intelligence , seismology , geology , operating system
Summary Wind turbines with doubly fed induction generators are highly sensitive to sudden changes in the stator voltage as the stator is directly connected to the grid. The stator current increases in fault conditions. Moreover, high rotor inrush currents are induced in the rotor due to the magnetic coupling between stator and rotor windings, which may cause severe damages to rotor‐side converter and result in DC‐link capacitor overvoltage. According to the new grid standards, WTs must be connected to the grid and contribute to the system stability during and after grid faults. In this paper, the sliding mode control strategy is used for the control of converters on rotor and grid sides in order to improve the fault ride through capability of doubly fed induction generator‐based WTs. Also, a sliding mode control model based on the input‐output feedback linearization is presented for the DC‐link voltage control under fault conditions. The simulation results using MATLAB‐SIMULINK have shown that the proposed control scheme properly enhances the fault ride through capability as compared with conventional control methods without requiring any additional hardware systems.