Low voltage ride-through capability improvement of DFIG-based wind turbines under unbalanced voltage dips.

Highlights: [•] The paper improves the LVRT capability of DFIG under unbalanced voltage dips. [•] LVRT method is realized through joint use of RSC control and an asymmetrical SDR. [•] Asymmetrical SDR resistors are activated only in phase(s) experiencing low voltage. [•] DFIG is controlled such that no unbalance voltage appears on the stator voltage. [•] The method removes fluctuation of transient response appeared during the fault. [Copyright &y& Elsevier]