Wind Turbine Generators and Uncertainty

[seenu]

For some commercial turbines, the blade pitch angle is unavailable. Could you please help me identify the level of uncertainties or errors in estimating power because of this?



Further, how do we calculate wind farm efficiency? Is there a link / site that I could refer to the best practices for each of the WAsP calculation and the level of uncertainty / error that could arise at each stage – even if the calculations are within the operational envelope?


Thank you.

[Niels Gylling Mortensen]

Dear Seenu,
I cannot help you with this question, but would have to refer you to the open literature. WindEurope made a series of test some years back that investigated uncertainties in power curves and wind farm modelling (Google 'CREYAP exercises'). Hope this helps...
Best regards,
Niels