This paper presents a simple methodology to
improve the low voltage ride-through (LVRT) capability of
Doubly Fed Induction Generator (DFIG) based wind turbines in
order to ride through higher voltage sags and durations. The
proposed method is based on selection of an appropriate value
for DC side super capacitor (SC) in such a way that it could help
wind turbine for LVRT without any need to crowbar protection.
The operation of SC based wind turbine in normal and fault
conditions is simulated using MATLAB/SIMULINK. The
simulation results show that the proposed method can be used
effectively for LVRT improvement and it is not necessary to use
crowbar in fault conditions.