Fault Ride-Through Capability Improvement of DFIG-Based Wind Turbine With an MBR-SFCL Connected in Stator Side

Doubly fed induction generators (DFIG) need to remain uninterrupted operation in case of faults. To promote fault ride-through (FRT) of DFIG, a new modified bridge-resistive-type superconducting fault current limiter (MBR-SFCL) is proposed. By comparison to the traditional SFCL, the resistance value can be adjusted. The basic principle, modeling, and control strategies of MBR-SFCL are demonstrated. The performance of the proposed MBR-SFCL is compared to traditional SFCL. The key parameters can be kept within their thresholds. The simulation studies show that proposed scheme can better satisfy the FRT capability of DFIG during faults and after faults clearance.