Method of controlling a blade pitch angle of a wind turbine by use of a hydraulic system

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United States of America Patent

PATENT NO 11542918
APP PUB NO 20210262436A1
SERIAL NO

17165997

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Abstract

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Provided is a method of controlling a pitch angle of at least one blade of a wind turbine by use of a hydraulic system, the hydraulic system including at least one reservoir configured to store a hydraulic fluid, and at least one pump configured to supply the hydraulic fluid from the reservoir to at least one accumulator, if a hydraulic fluid pressure in the accumulator falls below a lower threshold value and till the hydraulic fluid pressure in the accumulator exceeds an upper threshold value. The accumulator is configured to store the pressurized hydraulic fluid supplied by the pump and to supply the pressurized hydraulic fluid to at least one pitch control cylinder of the hydraulic system via at least one output valve of the hydraulic system. The pressurized hydraulic fluid in the pitch control cylinder drives at least one piston to change the pitch angle of the blade.

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Patent Owner(s)

Patent OwnerAddress
SIEMENS GAMESA RENEWABLE ENERGY A/S7330 BRANDE

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brill, Anthony Boulder, US 1 0
Kristensen, Mikkel Aggersbjerg Herning, DK 13 4

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