An analytical expression for the specific output of wind turbine generators

Using a Rayleigh distribution for the wind speed frequency distribution, an analytical expression for wind turbine generator specific output is derived and expressed in terms of machine characteristics and mean wind speed. Results are expressed as a family of curves which are functions of the cut-in, rated, and cut-out wind speeds. The results are compared with numerical calculations using actual wind results and with the specific output curve of Harder [1].