How wind turbine works

Main components of wind turbine are shown below:

1) Rotor blades: Converts kinetic energy of wind into rotational energy of shaft that is connected to nacelle. As wind passes through the blades, a pressure differential is created between the upper and lower surface of blade which creates a lift that is perpendicular to the direction of wind.
2) Nacelle: Nacelle is a casing that holds shaft, gearbox and generator, yaw drive, brakes and controller. Each component is defined below:
-Shaft transfers the rotational energy of rotor into generator.
-Gearbox converts the low speed shaft of rotor to a high speed shaft connected to generator.
-Generator produces electricity of medium voltage through electromagnetic induction.
-Yaw drive rotates the turbine to keep it in the direction of wind for maximum output.
-Controller monitors the entire system and controls all the operation.
-Brakes are used to stop the turbine in case of high wind speed to protect the blades and power overloading. It can also be done by changing the Pitch of blades.
-Anemometer measures wind speed and wind vane shows the direction of wind.
3) Tower: Tower holds the entire structure at height.
4) Electrical system: It takes the electricity from top to the bottom of the tower where it is stepped up to 22kV. It is then sent to a substation where it is stepped up to 132kV.