Power vs wind speed curve

Dear Jason,

I would like to ask that how can we calculate a curve like power output vs wind speed, or rotor rotational speed vs wind speed, or power output vs tip speed ratio, etc., for a wind turbine in FAST test examples, in a most straightforward way.

Besides, how can we know the cut-in, rated and cut-out wind speed of a wind turbine from running FAST simulations, e.g, for the wind turbines in FAST test examples.

Many thanks.

Yingyi Liu

Dear Yingyi,

See section 9 of the specifications report for the NREL 5-MW baseline wind turbine for an example and overview of how we created a curve of power, rotational speed, etc. versus wind speed using FAST: nrel.gov/docs/fy09osti/38060.pdf.

The rated wind speed can be found by examining the power curve i.e. the lowest wind speed where the turbine first reaches rated power. The cut-in and cut-out wind speeds are design features of the wind turbine are not specified in the FAST input file(s), or observable from the FAST output(s), for the sample models we’ve provided. (The cut-in and cut-out wind speeds would be set within the controller, if at all, but none of the sample FAST models we’ve provided publicly have these data set.) But for the NREL 5-MW turbine, the cut-in wind speed is 3 m/s and the cut-out wind speed is 25 m/s.

Best regards,

Dear Jason,

Thanks so much. That really helps.

Best Regards,
Yingyi Liu

Wher can I find the raw data to set up the 5 MW NREL wind speed vs. power curve please?

Sorted … Found in previous threads …/ Thanks