Dear NREL team

I am using FAST with simulink. I got Power coefficient as an output from FAST. Also I calculated the powercoefficient based on Rotor Aerodynamic torque, Low Speed Shaft velocity and incomming wind speed (Aerodynamic Power/Available power) but they are not equal. Why ?

Is this power coefficient (FAST output) similar to what WT-Perf or Aero-Dyn can provides. I mean if I calculate the CP curve by WT-Perf and I find the relevant CP from this curve (WT-Perf output), based on the TSR and Pitch angle of FAST model then the result should be equal to FAST output.

Regards

Mahmoud

Phd Candidate

NTNU-Trondheim Norway