Pitch control battery backup methods and system

Details Pitch control battery backup methods and system Pitch control battery backup methods and system

2005-09-09

2010-06-22

Look, Edward (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Method of operation

C416S027000

Reexamination Certificate

active

07740448

ABSTRACT:
A method for controlling a pitch control system of a wind turbine includes providing a charged backup battery configured to supply no energy to a DC link when full AC input power is available, wherein the DC link includes a DC link capacitor. The method further includes using energy stored in the DC link capacitor to operate a pitch control system during a loss or dip of AC input power, and maintaining charge on the DC link capacitor using the charged backup battery as voltage across the DC link capacitor drops during the operation of the pitch control system.

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