International Journal of Electronic Devices and Networking
2024, Vol. 5, Issue 2, Part A
Voltage and current dynamics in DFIG-based wind turbines under symmetrical faults: A MATLAB/Simulink-based simulation study with fault Ride-through strategy
Author(s): Chinedu Okeke, Amina Bello and Emeka Nwosu
Abstract: The increasing integration of wind energy into modern power grids highlights the need for robust operational strategies for Doubly-Fed Induction Generator (DFIG)-based wind turbines, particularly during grid disturbances such as symmetrical faults. This study aims to analyze the voltage and current dynamics of DFIG systems under symmetrical faults using MATLAB/Simulink-based simulations and evaluate the effectiveness of a Fault Ride-Through (FRT) strategy. The primary objectives were to simulate transient fault behavior, implement an FRT strategy, and assess system recovery in compliance with grid code requirements. The simulation model incorporated essential subsystems, including the rotor-side converter (RSC), grid-side converter (GSC), and DC-link chopper circuits. A symmetrical three-phase-to-ground fault was introduced, and voltage, current, and power dynamics were monitored across pre-fault, fault, and post-fault stages.The results indicated a significant voltage sag (average 0.4 pu) and a sharp current surge (average 2.5 pu) during fault conditions. Post-fault, voltage and current partially recovered to 0.9 pu and 1.1 pu, respectively, with a mean recovery time of approximately 2 seconds. Statistical analysis revealed notable deviations in system performance, with a voltage standard deviation of 0.265 pu and a current standard deviation of 0.707 pu. While the implemented FRT strategy effectively maintained grid connection and mitigated catastrophic hardware failures, limitations in recovery time and transient deviations suggest the need for further optimization. The study recommends the integration of advanced control strategies such as Model Predictive Control (MPC), AI-based adaptive controllers, and supercapacitor energy storage systems (SCES) to enhance fault resilience. Future work should focus on multi-fault scenario analysis, real-time validation using Hardware-in-the-Loop (HIL) platforms, and assessing the economic feasibility of these strategies. This research contributes to developing more resilient and grid-compliant wind energy systems, addressing the critical challenges posed by grid disturbances.
DOI: 10.22271/27084477.2024.v5.i2a.66
Pages: 48-53 | Views: 38 | Downloads: 10
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How to cite this article:
Chinedu Okeke, Amina Bello, Emeka Nwosu. Voltage and current dynamics in DFIG-based wind turbines under symmetrical faults: A MATLAB/Simulink-based simulation study with fault Ride-through strategy. Int J Electron Devices Networking 2024;5(2):48-53. DOI: 10.22271/27084477.2024.v5.i2a.66
