Low voltage ride-through capability improvement methods for DFIG based wind farm

Abstract

In this paper the low voltage ride-through (LVRT) capability enhancement of the DFIG based wind farm (WF) is accomplished by using of the existing series devices like the new bridge type fault current limiter (NBFCL), new solid-state fault current limiter (N-SSFCL), resistive solid-state fault current limiter (R-type SSFCL), inductive-resistive type solid-state fault current limiter (SSFCL-LR), and series dynamic braking resistor (SDBR). The LVRT analysis is done among the series devices in terms of LVRT capability improvement performances, implementation feasibility, and cost. A temporary balanced and unbalanced fault was applied in the DFIG based 15MW test model system to demonstrate the LVRT performance among the series devices. In this work, all simulations were executed in Matlab/Simulink software and from all simulation results, it can be stated that the mentioned all series devices can augment the LVRT capability during the fault, however the performance of the NBFCL and the N-SSFCL are most impressive in comparison to others.