Abstract:
The distorted output of a pitch angle controlled (PAC)
horizontal axis turbine, as influenced by short duration wind variations like turbulence and gusts, is analyzed under the assumption of
two-parameter Weibull statistics. The well accepted concept of turbulence intensity is used as a parametric measure of short duration
wind variations. Analytical expressions are formulated and used
to estimate the short duration aggregate power output from a turbine, together with the fractional deviations from corresponding
ideal zero-turbulence values. Operating conditions of constant turbulence intensity, and constant wind speed standard deviation, are
considered separately for the studies. Sensitivity of turbine output
power to cut-in and rated values of wind speed are evaluated and
discussed.
