07622815 is referenced by 29 patents and cites 65 patents.

A variable speed wind turbine having a doubly fed induction generator (DFIG) includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine which guarantees a stable voltage to the power converter. Thus, the power converter is not directly connected to the grid allowing the continuous operation of the system during a low voltage event in the grid.

Title
Low voltage ride through system for a variable speed wind turbine having an exciter machine and a power converter not connected to the grid
Application Number
11/618211
Publication Number
7622815 (B2)
Application Date
December 29, 2006
Publication Date
November 24, 2009
Inventor
Jorge Acedo
Pamplona
ES
David Sole
Pamplona
ES
Javier Perez Barbachano
Pamplona
ES
Jesus Mayor
Pamplona
ES
Josu Elorriaga
Plencia
ES
Iker Garmendia
Ondarroa
ES
Gregorio Rivas
Pamplona
ES
Agent
Sughrue Mion PLLC
Assignee
Ingeteam Energy
ES
IPC
H02P 9/04
F03D 9/00
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