A wind turbine is using aerodynamic effect to rotate blades and transform wind

into mechanical energy, the mechanical energy then transformed into electric

power through generator. The modernized wind turbine can achieve power

conversion efficiency between 20-40%.

Unlike those large commercial wind turbines, small wind turbines have been

widely used to provide distributed power for a variety of applications around the

world, such as on- or off-grid residences, telecommunication systems, street

lighting systems, remote monitoring systems and other purposes that require

energy where there is no electric grid, or where the grid is unstable.