• openAccess   Analysis of the Performance of MMC Under Fault Conditions in HVDC-Based Offshore Wind Farms 

      Vidal-Albalate, Ricardo; Beltran, Hector; Rolán Blanco, Alejandro; Belenguer Balaguer, Enrique; Peña, Rubén; Blasco-Gimenez, Ramon Institute of Electrical and Electronics Engineers (IEEE (2016-04)
      This paper analyzes the behavior of a modular multilevel converter-high-voltage direct-current (MMC-HVDC)-connected offshore wind power plant (WPP) during dc faults. For that purpose, detailed models of the dc cable, ...
    • openAccess   Detailed study of DFIG-based wind turbines to overcome the most severe grid faults 

      Rolán Blanco, Alejandro; Pedra Durán, Joaquín; Córcoles López, Felipe Elsevier (2014-11)
      This paper studies the effects of voltage sags caused by faults on doubly-fed induction generators to overcome grid faults. A wide range of sag duration and depth values is considered. It is observed that sag duration ...
    • 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 ...