Prepare maintenance schedule of various actuators used in large wind power plants.

Prepare maintenance schedule of various actuators used in large wind power plants. 
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Answer :

Maintenance Schedule of Various Actuators:

Maintenance of Yaw System Actuator:

The maintenance of Yaw system actuator is done quarterly or yearly. Following maintenance activities are to be performed: 1. Yaw actuator is prone to wear due to its frequent operations and so it is one of the causes of down time, Yaw system has short service life and difficult access for the maintenance. 2. Check and adjust the yaw motor and nacelle bearing. 3. Check the brake pad and change if required. 4. Regular maintenance of yaw bearing. 5. Check the area of oil leak, if any. Select the right type of oil as per operational requirement. 6.Gears in the drivers should be filled with grease and oil. 7. Electric Brake, motor fan, joint-bolts, hydraulic brake, yaw pads should be checked. 8. Check out the rusting, amount of dirt and wear of brake pads. 9. Blades have to be inspected such that there should not be obstruction for right operation. 


Maintenance of Pitch System Actuator: The maintenance of Pitch system Actuator is done quarterly or yearly. Following maintenance activities are to be performed: 1. Maintenance of tower, blades, rotor, and generator will contribute to proper functioning of the system. 2.Presently feedback control system provides control signal for pitch angle, pitch torque, temperature and data. 3.Real time data allows action for preventive maintenance and optimal performance. 4.Actuators and sensors monitor and give the signal for the area, which needs attention and maintenance. 5.In fault condition, actuators will send signal to the operator to shut down the turbine in controlled condition. 6.Monitor vibration level and if it is more than the limiting condition, then send alarming signal. 7.Monitor change in temperature, pressure and mechanical stresses. 

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