Improving low voltage ride-through using super capacitor at the DC link of doubly-fed induction generator based wind turbine

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.