Research on Effective Fault Ride of Variable Speed Permanent Magnet Wind Generator Based on Resistor-Type Superconducting Fault Current Limiters

This article conducts in-depth research on the Low Voltage Ride Through (LVRT) capability of Permanent Magnetic Synchronous Generator (PMSG) based Wind Turbine Generators (WTG) under the action of Resistor-type Superconducting Fault Current Limiters (R-SFCL). R-SFCL integrates detection, triggering, and current limiting, with a simple structure, fast response, and low loss during normal operation. It has potential advantages in enhancing LVRT capability of Wind Turbine Generators (WTGs) systems. According to the relevant requirements of LVRT, PMSG mathematical model and vector control strategy, combined with the mechanism of R-SFCL, a simulation model was built through PSCAD/EMTDC. From the simulation results, the use of R-SFCL helps to maintain power balance, suppress voltage and current fluctuations, and improve utilization of wind energy. At the same time, it is compared with traditional solution based on energy consuming Crowbar, the feasibility and superiority of the proposed scheme in the article have been fully demonstrated.