When wind moves at the turbine blades, the turbine rotates 
because of the layout and alignment of rotor blades. The shaft of the turbine is 
coupled with an electrical generator. The output of the generator is accumulated 
thru electric powered energy cables. 
 
When the wind moves the rotor blades, blades begin rotating. The turbine rotor is 
linked to a excessive-velocity gearbox. 
Gearbox transforms the rotor rotation from low velocity to excessive velocity. The excessive- 
velocity shaft from the gearbox is coupled with the rotor of the generator and 
as a result the electric generator runs at a better velocity. 
An exciter is wanted to offer the desired excitation to the magnetic coil of the 
generator subject gadget in order that it could generate the desired electricity. The 
generated voltage at output terminals of the alternator is proportional to each the 
velocity and subject flux of the alternator. 
The velocity is ruled through wind energy that is out of manage. Hence to preserve 
uniformity of the output energy from the alternator, excitation ought to be managed 
in step with the provision of herbal wind energy. 
The exciter modern is managed through a turbine controller which senses the wind 
velocity. Then output voltage of electrical generator(alternator) is given to a 
rectifier in which the alternator output receives rectified to DC. 
Then this rectified DC output is given to line converter unit to transform it into 
stabilized AC output that is in the long run fed to both electric transmission 
community or transmission grid with the assist of step up transformer. 
An more devices is used to offer the energy to inner auxiliaries of wind turbine (like 
motor, battery etc.), that is known as Internal Supply Unit. 
There are different  manage mechanisms connected to a present day huge wind turbine. 
Controlling the orientation of the turbine blade. 
Controlling the orientation of the turbine face. 
The orientation of turbine blades is ruled from the bottom hub of the blades. 
The blades are connected to the primary hub with the assist of a rotating 
association thru gears and small electric powered motor or hydraulic rotary gadget. 
The gadget may be electrically or robotically managed relying on its layout. 
The blades are swiveled relying upon the velocity of the wind. The approach is 
known as pitch manage. It gives the great viable orientation of the turbine blades 
alongside the route of the wind to acquire optimized wind energy. 
The orientation of the nacelle or the whole frame of the turbine can comply with the 
route of converting wind route to maximise mechanical strength harvesting 
from the wind. 
The route of the wind at the side of its velocity is sensed through an anemometer 
(computerized velocity measuring devices) with wind vanes connected to the lower back pinnacle of 
the nacelle. 
The sign is fed lower back to an digital microprocessor-primarily based totally controlling gadget 
which governs the yaw motor which rotates the whole nacelle with gearing 
association to stand the air turbine alongside the route of the wind.