Windmills can only supplement nuclear, coal or probably hydro power. Wind energy is 'dirty' energy. It needs to go into a larger 'pool' of good stable energy like nuclear. With nuclear you can precisely control the voltage or megawatts or whatever. Whereas the wind is irratic. Once the wind energy goes into the larger stream it takes on that stable frequency.
Windmills can only supplement nuclear, coal or probably hydro power. Wind energy is 'dirty' energy. It needs to go into a larger 'pool' of good stable energy like nuclear. With nuclear you can precisely control the voltage or megawatts or whatever. Whereas the wind is irratic. Once the wind energy goes into the larger stream it takes on that stable frequency.