US 12,392,323 B2
System and method for improved extreme load control for wind turbine rotor blades
Francesco Perrone, Norderstedt (DE); and Leonardo Cesar Kammer, Schenectady, NY (US)
Assigned to GE Vernova Renovables Espana, S.L., Barcelona (ES)
Filed by General Electric Renovables Espana S.L., Barcelona (ES)
Filed on Apr. 9, 2020, as Appl. No. 16/844,575.
Prior Publication US 2021/0317818 A1, Oct. 14, 2021
Int. Cl. F03D 7/04 (2006.01); F03D 7/02 (2006.01); G01M 5/00 (2006.01)
CPC F03D 7/042 (2013.01) [F03D 7/0224 (2013.01); F03D 7/024 (2013.01); F03D 7/045 (2013.01); G01M 5/0016 (2013.01); F05B 2260/821 (2013.01); F05B 2270/322 (2013.01); F05B 2270/331 (2013.01); F05B 2270/332 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for reducing loads acting on at least one rotor blade of a wind turbine, the method comprising:
calculating, via a processor, a flapwise bending moment of the at least one rotor blade;
calculating, via the processor, an edgewise bending moment of the at least one rotor blade;
calculating, via the processor, an average load envelope of a blade root bending moment of the at least one rotor blade as a function of the flapwise bending moment and the edgewise bending moment of the at least one rotor blade;
calculating, via the processor, an overall load envelope of the blade root bending moment of the at least one rotor blade as a function of the average load envelope and a future load estimation of the blade root bending moment of the at least one rotor blade; and
pitching, via the processor, one or more rotor blades of the wind turbine when the overall load envelope is above a certain threshold.