A discrete gust model for use in the design of wind energy conversion systems.

Abstract

A discrete gust model is described. The model incorporates the number-of-crossings theory. An expression for the number of times per unit time the wind exceeds a specific value is derived as a function of mean wind speed and the standard deviation of turbulence. A technique for determining the cut-off frequency which represents the upper limit of integration used to estimate the standard deviation of wind fluctuation accelerations is described. Utilizing this definition of cut-off frequency, comparison of prediction and experiment is carried out.-from Authors