The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2014
Filed:
Dec. 09, 2011
Wolfgang Kabatzke, Geesthacht, DE;
Hermann Rochholz, Bozen, IT;
Jochen Birkemeyer, Norderstedt, DE;
Nordex Energy GmbH, Hamburg, DE;
Abstract
Method for operating a pitch-controlled wind turbine, in which a set-point value for the generator torque (M) is prescribed in dependence upon a rotational speed (n) of the generator or of the rotor. A transition point (n, M) is provided at which a transition from a partial-load operation to a nominal-load operation occurs. A control of the rotational speed takes place by adjusting the blade pitch angle for a set-point value (M) from the transition point. The values (n, M) of the transition point are determined in dependence upon a current value of the air density. With falling air density, the rotational speed (n) is increased and/or the set-point value for the generator torque (M) is reduced.