1)The wind turns the blades.
2)The blades turns a shaft inside the nacelle (the box at the top of the turbine).
3)The shaft goes into a gearbox which increases the rotation speed.
4)The generator converts the rotational energy into electrical energy.The transformer converts the electricity from around 700 Volts (V) to the right voltage for distribution, typically 33,000V.
5)The National Grid transmits the power around the country.