Prime-mover dynamo plants – Electric control – Fluid-current motors
Reexamination Certificate
2007-12-12
2008-12-30
Ponomarenko, Nicholas (Department: 2834)
Prime-mover dynamo plants
Electric control
Fluid-current motors
C290S055000, C290S054000, C322S029000
Reexamination Certificate
active
07471007
ABSTRACT:
The invention relates to Method of operating a wind turbine, wherein rotor windings of an induction generator, which comprises stator coils coupled to a voltage grid, fed with rotor currents by a feed-in unit are driven by a rotor of the wind turbine; wherein the frequencies of the fed-in rotor currents are controlled depending on the rotor rotation frequency and the feed-in unit is electrically decoupled from the rotor windings in the case predetermined variations of the grid voltage amplitude and the rotor current feed-in is resumed after the decoupling caused by the variation of the grid voltage amplitude, when the currents generated in the rotor windings by the variation have declined to a predetermined value.
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Bücker Andreas
Janssen Wilhelm
Lütze Henning
Blakely , Sokoloff, Taylor & Zafman LLP
General Electric Company
Mohandesi Iraj A
Ponomarenko Nicholas
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