A wind turbine is a device that converts the kinetic energy of wind into electrical energy by using large blades to spin a rotor connected to a generator. This process works similarly to a fan in reverse, where the wind turns the blades, and the spinning motion drives a generator to produce electricity. Wind turbines are a form of renewable energy and can be found in large-scale wind farms, either on land (onshore) or at sea (offshore). 

How wind turbines work

• Capturing wind energy: Wind flows over the specially shaped blades, creating a difference in air pressure that generates a lifting force.
• Generating rotation: This lift force causes the rotor, which is connected to the blades, to spin.
• Generating electricity: The spinning rotor turns a shaft, which either directly or through a gearbox, spins a generator. The generator converts this rotational energy into electrical energy.
• Transmitting electricity: The electricity is then converted to the correct voltage and sent to the power grid for distribution. 

Key components

• Blades: The long, airfoil-shaped blades capture the wind’s energy. They are often made of fiberglass, carbon fiber, or epoxy resin.
• Rotor: The hub and blades that spin when wind hits them.
• Nacelle: The housing at the top of the tower that contains the main components, including the gearbox and generator.
• Tower: A tall structure that supports the rotor and nacelle, placing them at a height where wind is stronger and more consistent. 

Types of wind turbines

• Horizontal-axis: The most common type, with propeller-like blades and a rotor that is positioned parallel to the ground.
• Vertical-axis: The rotor is positioned vertically, but these are much less common than horizontal-axis turbines.