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The effect of wind shear and pitch control delaying on wind turbine blade loading

The loading analysis model of wind turbine blade is established according to strip theory of rotor aerodynamics. For a 1.5MW wind turbine, the force distribution on blade at rated wind speed and the moments of the blade root in various work case are dealt with by this model. The Effect of pitch control delaying on the loads of wind turbine blade is specially analyzed, too. The results show that the moment of the blade root under wind shear and weight of the blade changes periodically, which has a large effect on the fatigue life of the blade. Furthermore, as a result of the pitch control delaying, aerodynamic loads of the blade will increase rapidly with the increase of wind speed. Hence, the loads analysis of this paper may be applicable to the design analysis of the blade.