Related to WPP define following wind speeds

Related to WPP define following wind speeds 

i) Cut in 

ii) Cut out

iii) Survival

iv) Threshold
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1 Answer

Answer :

i) Cut-in wind speed: This is the minimum wind speed at which the turbine blades overcome friction and begin to rotate. 

ii) Cut out speed: This is the speed at which the turbine blades are brought to rest to avoid damage from high wind. 

iii) Survival speed: It is the maximum speed of wind, above which wind turbines will be damaged, and speed up to which turbine are designed to work safely. 

iv) Threshold wind speed: It is range of speed between cut in and cut out speed. By operating in this range, it is ensured that available energy is above the minimum threshold and structural health is maintained.
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