Fault Ride Through Technique for DFIG-based Wind Turbines Under Grid Three-phase Faults
Makolo, P; Justo, JJ; Mwasilu, F; Zamora, R
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In modern power systems with increasing penetration of wind turbines (WTs), improvement of low voltage ride through (LVRT) capability of WTs equipped with doubly-fed induction generators (DFIGs) is an important topic. Thus, this paper proposes an LVRT strategy and compares its performance with a widely used conventional LVRT strategy. The proposed strategy is designed with a capacitor connected in series with an inductor and both are connected in parallel to a resistor. This configuration is then connected to the ac side of the rotor side converter (RSC) via an R-L circuit. To validate the performance of the proposed scheme, three phase fault condition is simulated and analysed. Based on simulation results obtained in MATLAB/Simulink, there is significant improvement achieved in the stated objectives compared to the conventional LVRT scheme.