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:
Apr. 20, 2021
Filed:
Jan. 22, 2019
Siemens Gamesa Renewable Energy A/s, Brande, DK;
Mikkel Aggersbjerg Kristensen, Herning, DK;
SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande, DK;
Abstract
A method for controlling the pitch angle of the blades including the following steps of: measuring an energy storage of the blades pitch actuation system at predefined values of a first blade pitch angle interval; comparing the measured values of the energy storage of the blades pitch actuation system with a predefined minimum value of the energy storage; if the measured values of the energy storage are all greater or equal than the predefined minimum value of the energy storage then enabling normal operation; if at least one of the measured values of the energy storage are lower than the predefined minimum value then: calculating a third pitch angle calculating a third blade pitch angle interval extending between a fourth pitch angle and the second pitch angle; and limiting the blades pitch actuation system to operate only in the third pitch angle interval.
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