Prime-mover dynamo plants – Electric control – Fluid-current motors
Patent
1997-06-09
1999-05-25
Enad, Elvin G.
Prime-mover dynamo plants
Electric control
Fluid-current motors
290 42, 290 43, 290 55, 416147, 416163, F03D 900, H02P 904
Patent
active
059071923
ABSTRACT:
Stored rotational energy in an operating variable speed wind turbine is used to pitch blades and brake the wind turbine in the event of utility power grid failure. In one embodiment, a generator IGBT converter and the main power utility grid IGBT converter supply control and pitch servo power during turbine deceleration, and a ride-through capacitor on a DC emergency power supply bus and the main DC link capacitor provide additional energy storage. In another embodiment, a step-down DC/DC power converter adds to the intermediate DC link of the power conversion system with the secondary of the step down converter powering both the hub pitch controller and the wind turbine control system.
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Bixel Paul Scott
Esser Albert Andreas Maria
Lyons James Patrick
Agosti Ann M.
Enad Elvin G.
General Electric Company
Snyder Marvin
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