Braking Mechanism For The Large WPP:
1. Furling Mechanism:
Furling allows the whole set of blades to change its position and blades turned away from wind, if wind speed is beyond safety limit. It decreases the angle of attack.
2. Yawing Mechanism:
It is used for the precise positioning of the nacelle in the wind. Yaw system allows optimum position of the nacelle in the high wind speed conditions. For the large WPP it is monitored by computer and electronic control where as small wind turbine uses tail vane for positioning purpose.
3. Pitch Control Mechanism:
It allows the rotor blades angle of attack to be measured, monitored and controlled. Pitch control used for adjustment of blade angle.
1.To harness optimum power from wind
2.To protect turbine in case of high wind speed.