Super-twisting control for improved synchronization of DFIG with grid.
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Abstract
This paper presents a voltage-oriented control (VOC) technique that use super twisting control (STC) to synchronize a doubly fed induction generator (DFIG) with the grid. The proposed scheme focuses on regulating the DFIG stator voltage by controlling the rotor currents using STC. Simulations were conducted using the SimPower System toolbox, followed by robustness testing and verification of voltage quality through fast Fourier transform (FFT) analysis. The smooth coupling of the DFIG with the grid and the resulting total harmonic distortion of the stator voltage (THD = 2.3%) demonstrate the effectiveness of the suggested control method. Even after changing the system parameters, the THD remains below 5% (THD = 3.43%), which proves the robustness of the control strategy.
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References
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