Principle of wind power high voltage generator

How does a wind turbine generate electricity?

The rotation is transmitted through a gearbox to a generator, which converts it into electricity. The magnitudes of the lift and drag on the turbine blade are dependent on the angle of attack between the apparent wind direction and the chord line of the blade. Several different factors influence the power output of a wind turbine.

How does wind speed affect turbine power?

Turbine power increases with the cube of wind velocity. For example, a turbine at a site with an average wind speed of 16 mph would produce 50 percent more electricity than the same turbine at a site with average wind speeds of 14 mph. These two fundamental physical relationships are behind the drive to scale up the physical size of turbines.

What is a dynamo generator in a wind turbine?

The same thing happens in a wind turbine, only the "dynamo" generator is driven by the turbine's rotor blades instead of by a bicycle wheel, and the "lamp" is a light in someone's home miles away. In practice, wind turbines use different types of generators that aren't very much like dynamos at all.

How many kilowatts does a wind turbine produce?

Large wind turbines, most often used by utilities to provide power to a grid, range from 100 kilowatts to several megawatts. These utility-scale turbines are often grouped together in wind farms to produce large amounts of electricity.

Why does a wind turbine not produce power?

Below the cut-in wind speed, the turbine cannot produce power because the wind does not transmit enough energy to overcome the friction in the drivetrain. At the rated output wind speed, the turbine produces its peak power (its rated power). At the cut-out wind speed, the turbine must be stopped to prevent damage.

How much power does a 2MW turbine generator produce?

Running at maximum capacity, a typical 2MW turbine generator will produce 2 million watts of power at about 700 volts. Anemometers (automatic speed measuring devices) and wind vanes on the back of the nacelle provide measurements of the wind speed and direction.