Working of a wind turbine is illustrated in this video with the help of animation.Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor.
The rotor is connected to the main shaft, which spins a generator to create electricity. The topic covered are blade design, use of brake, velocity sensor, yawing mechanism, blade tilting, wind turbine efficiency and Betz’s limit.The wind turbine working principle is followed by engineers when generating power through the forces of nature.
Wind turbines are mounted on a tower to capture the most energy. At 100 feet (30 meters) or more above ground, they can take advantage of faster and less turbulent wind. Large three-bladed horizontal-axis wind turbines have the main rotor shaft and electrical generator at the top of a tower, and must be pointed into the wind.
Most have a gearbox, which turns the slow rotation of the blades into a quicker rotation that is more suitable to drive an electrical generator.Offshore wind turbines are built up to 8 MW today and have a blade length up to 80 meters (260 ft). Designs with 10 to 12 MW are in preparation.