US 12,392,323 B2 · System and method for improved extreme load control for wind turbine rotor blades

Abstract

A method for reducing extreme loads acting on at least one rotor blade of a wind turbine includes calculating, via a processor, a flapwise bending moment of the rotor blade(s). Further, the method includes calculating, via the processor, an edgewise bending moment of the rotor blade(s). The method also includes calculating, via the processor, an average load envelope of a blade root bending moment of the rotor blade(s) as a function of the flapwise bending moment and the edgewise bending moment of the rotor blade(s). Moreover, the method includes calculating, via the processor, an overall load envelope of the blade root bending moment of the rotor blade(s) as a function of the average load envelope and a future load estimation of the blade root bending moment of the rotor blade(s). As such, the method also includes implementing, via the processor, a control action when the overall load envelope is above a certain threshold.

Claims19

Dependent claims

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.

3 more elements

A system for reducing loads acting on at least one rotor blade of a wind turbine, the system comprising:

a controller comprising at least one processor configured to perform a plurality of operations, the plurality of operations comprising:
calculating a flapwise bending moment of the at least one rotor blade;
calculating an edgewise bending moment of the at least one rotor blade;
calculating 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;
filtering the average load envelope of the blade root bending moment via at least one filter;
calculating 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 one or more rotor blades of the wind turbine when the overall load envelope is above a certain threshold.

5 more elements

Dependencies are inferred from the claim text.

System and method for improved extreme load control for wind turbine rotor blades

Life of this patent

System and method for improved extreme load control for wind turbine rotor blades

Life of this patent

Abstract

Claims19