Performance of wind turbines in a turbulent atmosphere

Abstract The effect of atmospheric turbulence on the power fluctuations of large wind turbines is studied. The significance of spatial non-uniformities of the wind is emphasized. The turbulent wind correlation in time and space is simulated on the computer by Shinozukas method. The wind turbulence is modeled according to the Davenport spectrum with an exponential spatial correlation function. The rotor aerodynamics is modeled by simple blade element theory. Comparison of the spectrum of power output signal between 1-D and 3-D turbulence. shows the significant power fluctuations centered around the blade passage frequency.

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