The vanes turn a generator, which produces electricity. Wind turbines Wind carries more power at higher speeds. Wind turbines will not work in winds below about 13 kilometres an hour. They work best where the wind speed averages 22 kilometres an hour or more. Most places do not have strong enough winds, blowing often enough, for wind turbines to be practical.
Winds blow strongest near coasts, in mountain passes and on prairies.
These are usually the best places for wind turbines. Some of the best windy places have many wind turbines. They are all connected to the same transmission line, which carries the electricity where it will be used. These collections of wind turbines are called wind farms. The most famous wind farm, in Altamont Pass, California, has 7,500 turbines.