configuration for LC 3.2 in OC4 Phase I

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KaMei.Chan
Posts: 4
Joined: Mon Mar 11, 2019 10:12 pm
Organization: CR Classification Society
Location: Taiwan

configuration for LC 3.2 in OC4 Phase I

Postby KaMei.Chan » Wed Mar 13, 2019 12:25 am

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 :
Image

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
    https://www.nrel.gov/docs/fy09osti/38060.pdf
3. 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.

BR,

Kylee

Jason.Jonkman
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Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: configuration for LC 3.2 in OC4 Phase I

Postby Jason.Jonkman » Wed Mar 13, 2019 6:49 am

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,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov

KaMei.Chan
Posts: 4
Joined: Mon Mar 11, 2019 10:12 pm
Organization: CR Classification Society
Location: Taiwan

Re: configuration for LC 3.2 in OC4 Phase I

Postby KaMei.Chan » Wed Mar 13, 2019 8:11 pm

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!

BR,
Kylee


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