configuration for LC 3.2 in OC4 Phase I

Hi all, currently i am trying to retrace the result of OC4 Phase I Rev 4 with FAST v8.16. Now i am looking for the case 3.2 described as following picture :

I have some questions about the configuration for this load case :

  1. For the “enabled DOF” column, does it mean all DOF should be enabled in ElastoDyn
  2. Is it correct for the following setting in ServoDyn in this load case?

PCMode = 5
VSControl = 1
VS_RtGnSp = 1173.7
VS_RtTq = 43093.55
VS_Rgn2K = 0.0255764
VS_SIPC = 10

the data in SIMPLE VARIABLE-SPEED TORQUE CONTROL part is refer to the chapter 5 Drivetrain Properties, Definition of a 5-MW Reference Wind Turbine for Offshore System Development

  1. For the wind conditions, is it correct for the following setting in BEM thoery Options used in AeroDyn v15?

2 SkewMod
True TipLoss
True HubLoss
true TanInd
False AIDrag
False TIDrag
“Default” IndToler

Thank You for your help.



Dear Kylee,

Here are my answers to your questions:

  1. Yes (except the teeter DOF, only applicable to 2-bladed rotors, TeetDOF=False).
  2. You should set PCMode and VSContrl both equal to 5. The Bladed-style DLL controller for the NREL 5-MW turbine includes both pitch and torque control.
  3. Yes.

Best regards,

Dear Jason,

Thank you for your help. I run this case with 120s (the suggested simulation time is 30s but i tried to check the trend for those parametres) and it seems fitting that the result from the Rev4. report. Many Thanks!