US 11,668,282 B2
Wind energy installation and a method of operating a wind energy installation
Oliver Hör, Bredenbek (DE); Stefan Behl, Neumünster (DE); and Karsten Warfen, Weede/Söhren (DE)
Assigned to Siemens Gamesa Renewable Energy Service GmbH, Hamburg (DE)
Filed by Siemens Gamesa Renewable Energy Service GmbH, Hamburg (DE)
Filed on Jul. 2, 2021, as Appl. No. 17/366,652.
Claims priority of application No. 10 2020 004 034.9 (DE), filed on Jul. 3, 2020; application No. 10 2020 004 035.7 (DE), filed on Jul. 3, 2020; and application No. 10 2020 004 036.5 (DE), filed on Jul. 3, 2020.
Prior Publication US 2022/0003209 A1, Jan. 6, 2022
Int. Cl. F03D 7/02 (2006.01)
CPC F03D 7/0264 (2013.01) [F03D 7/0224 (2013.01); F05B 2260/70 (2013.01); F05B 2260/76 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a wind energy installation, the wind energy installation including a rotor with at least one rotor blade that is adjustable in terms of an angle of the at least one rotor blade, and an adjustment drive for adjusting the at least one rotor blade, the method comprising:
adjusting the at least one rotor blade in a direction of a shutdown position with the adjustment drive in response to the occurrence of at least one special operating case;
in the shutdown position of the at least one rotor blade, at least one of:
switching off a supply of energy from an energy storage device to the adjustment drive for adjusting the at least one rotor blade in the direction of the shutdown position in response to a condition wherein switching off the supply of energy has not already occurred, or
closing a pitch brake configured for holding the at least one rotor blade in a current position in response to a condition wherein closing the pitch brake has not already occurred; and
then, based on at least one activation signal, adjusting the at least one rotor blade with the adjustment drive in an adjustment mode of operation while the at least one special operating case is still ongoing.