What is the typical pitching speed of modern MW turbine blades and do this blades pitch fast enough compared to changing wind speeds?
Significantly very fast. Standing at the control panel of a Vestas 850 kw , I saw the display was showing the instantaneous power production and pitch angle. The display was updating either every second or half second and each reading gave different readings. so a time constant for the pitch of under a second, for 40 m blades is astonishing!
Hi Mfon,
as you know, the time required for a given blade to reach 63.2% of its maximum rated speed in a no-load condition should be the definition of TC . so, I think first you should find a manual for such a rotor which contains some information about the cutoff frequency, in this regards, I think it should be something in order 10^-5
mm not sure, I will say that it is slow, about 1deg/second; 90 seconds to go from flat to neutral. A small motor driving a lot of reduction gears.
You may ask to Bonfiglioli, they make the pitch drives:
https://www.bonfiglioli.com/international/en/application/wind-turbine_pitch
Significantly very fast. Standing at the control panel of a Vestas 850 kw , I saw the display was showing the instantaneous power production and pitch angle. The display was updating either every second or half second and each reading gave different readings. so a time constant for the pitch of under a second, for 40 m blades is astonishing!
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