Wind energy converters in a real windfield: calculation of hourly mean power output

A method is presented for the calculation of the mean hourly power output of Wind Energy Converters (WEC) in turbulent wind fields. It is based on the numerical integration of the non-linear differential equation of the WEC with time series of wind speed as input signal. Time series showing typical characteristics of the wind field for a specific site may be synthesized using mathematical models of the spectral power density of wind speed when the turbulence intensity at the location is known. A specimen analysis of a turbulence model taken from the literature is performed for a non-ideal site.