![]() However, because the power converters of the DFIG wind turbine are fragile, they are vulnerable during grid faults. In addition, the DFIG has cost effective power converters with low power losses, the ability to better capture wind energy, and good active and reactive power regulation in four quadrants, making it widely used compared to other fixed speed wind turbine technology (Okedu, 2020). In wind energy application, the Doubly Fed Induction Generator (DFIG) has a major advantage because its power converters require only 20–30% of the machine rating, for interfacing the rotor and the grid ( Xu and Cartwright, 2006 Okedu, 2019). The results show that the proposed hybrid control strategy aids the fast recovery of the DFIG wind generator variables during fault conditions. Simulations were run in Power System Computer Aided Design and Electromagnetic Transient state Including DC (PSCAD/EMTDC) to examine severe fault conditions, and to test the robustness of the controllers employed. ![]() The SDBR helps the post fault recovery of the wind generator. This paper proposes a new approach that integrates PLL control strategy and a Series Dynamic Braking Resistor (SDBR) to augment the fault ride through capability of a variable speed wind turbine that is DFIG-based. Consequently, it helps in preventing power system distortion due to stator-grid interphase. The PLL computes the phase displacement of the grid required to achieve orientation and synchronization control. The optimal excitation parameters of IGBTs were used for further analysis of the wind generator, considering a new Phase-Locked-Loop (PLL) scheme. This paper undertakes an extensive analysis of the effects of the excitation parameters of the power converter Insulated Gate Bipolar Transistors (IGBTs), on the transient state performance of the Doubly Fed Induction Generator (DFIG), considering different scenarios. The rotor and stator windings of the wind generator, including its insulation, could be affected. ![]() During transient state, the gearbox, shaft, and rotor of the wind generator could be damaged due to mechanical stress. The major aim for achieving the successful synchronization of a wind turbine system to the grid is to mitigate electrical and mechanical stresses on the wind generator. 3Department of Environmental Engineering, German University of Technology, Muscat, Oman.2Department of Electrical and Electronic Engineering, Kitami Institute of Technology, Hokkaido, Japan.1Department of Electrical and Computer Engineering, National University of Science and Technology, Muscat, Oman.
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