International Journal of Electrical Engineering and Computer Science
E-ISSN: 2769-2507
Volume 7, 2025
Effect of the DC link Parameters on Transient Peaks and Harmonics Generated due to Grid Faults in Wind-Driven DFIG
Authors: ,
Abstract: In this paper, the effect of the DC link capacitor (Cd), and DC link inductor (Ld), on the performance of the grid-connected, wind-driven, Double-Fed Induction generator (DFIG) is investigated during 3-phase symmetrical grid-voltage faults. The DFIG system is modelled using Matlab/Simulink software, and simulation results are plotted against Cd and Ld for each of the three considered grid faults. The transient peaks of the stator current, rotor current, rotor voltage, and DC link current and voltage, due to grid voltage sag, grid voltage swell, and the 3-phase-to-ground fault at different values of Cd and Ld are presented. The current and voltage harmonics generated due to grid faults at different Cd and Ld values are also investigated. The time taken by the DFIG currents and voltages to reach their steady state is calculated, for the 3-phase ground fault, as a function of DC link parameters. Investigating the responses of stator and rotor currents, rotor voltage, and DC-link voltage and current at different values of Cd and Ld lead to conclude the optimum values of the DC-link parameters that lead to fast fault recovery.
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Keywords: Double-Fed Induction generator (DFIG), DC link capacitor (Cd), DC link inductor (Ld), 3-phase symmetrical grid-voltage faults
Pages: 8-16
DOI: 10.37394/232027.2025.7.2