Combinational Scheme for LVRT Performance Enhancement of DFIG-Based Wind Turbine Using SSFCL and RSDR

To enhance the low-voltage ride-through (LVRT) performance of doubly-fed induction generator (DFIG) based wind turbine during different fault stages, this paper presents a novel combinational LVRT scheme by using a stator-side superconducting fault current limiter (SSFCL) and a rotor-side series dynamic resistor (RSDR). The basic principle, circuit modeling and switching strategies of the SSFCL and RSDR are presented to compose the primary and backup protections. Then the comparative study between the proposed SSFCL-RSDR-based combinational scheme and a SSFCL-based scheme is conducted. The simulation results obtained show that the stator voltage, stator current and active power behaviors of the DFIG during the whole fault stage are significantly enhanced.