How did wind turbines work in 1995?
- turn the turbine so that it does not face in to the wind, reducing the effective rotor area.
- adjust the angle of the individual blades to reduce aerodynamic lift and so limit the power captured.
- use the generator controls to limit the amount of mechanical power converted in to electrical energy.
The Inventive Concept
“Method of operating a wind turbine for the production of electricity in an electrical network with pitch control, in which the power of the wind turbine as well the operating speed of the rotor is continuously reduced when a wind velocity is reached which is in danger of overloading the wind turbine, in dependence on the rise in the wind velocity”.