• openAccess   Reduced-Order Models of Squirrel-Cage Induction Generators for Fixed-Speed Wind Turbines under Unbalanced Grid Conditions 

      Rolán Blanco, Alejandro; Córcoles López, Felipe; Bogarra, Santiago; Monjo, Lluís; Pedra Durán, Joaquín Institute of Electrical and Electronics Engineers (IEEE) (2016-06)
      This paper develops a study of reduced-order models for squirrel-cage induction generators (SCIG) used in fixed-speed wind turbines (WTs). The squirrel-cage of these generators must be modeled with a double-cage for ...
    • openAccess   Testing of three-phase equipment under voltage sags 

      Rolán Blanco, Alejandro; Córcoles López, Felipe; Pedra Durán, Joaquín; Monjo, Lluís; Bogarra, Santiago Institution of Engineering and Technology (IET) (2015-04)
      This paper provides insight into the testing of three-phase equipment exposed to voltage sags caused by faults. The voltage sag recovers at the fault-current zeros, leading to a `discrete' voltage recovery, that is, the ...