Technology
A wind turbine is a device that converts the kinetic energy of wind into mechanical energy, which is then turned into electricity via a generator. It typically consists of large blades (rotor) attached to a hub, which is connected to a nacelle housing a generator (and often a gearbox) atop a tall tower. As wind blows, it causes the blades to spin, turning the generator and producing power. Wind turbines come in various sizes: small ones for residential or farm use, and massive utility-scale turbines found in onshore wind farms or offshore installations. Key specifications include rated power (e.g., 2 MW or 5 MW per turbine), cut-in wind speed (when they start generating), and cut-out wind speed (when they shut down to avoid damage in high winds). Wind turbines are a cornerstone of wind energy, a clean and renewable power source, and they are often grouped together to form wind farms that supply electricity to the grid.