NREL 5MW controls (DLL interface)

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Lingling.Yin
Posts: 57
Joined: Wed Jan 23, 2013 12:47 pm
Organization: University of Houston
Location: Houston

Re: NREL 5MW controls (DLL interface)

Postby Lingling.Yin » Thu Mar 27, 2014 9:33 pm

Dear Marshall,

Really appreciate!

Did you also have troubles when running with SNL 13.2 MW rotor? I have tried the initial azimuth as 60 and 90 but the blade deflections are still as high as 50 meters. Do you have some other suggestions?

When will the FAST with BeamDyn be published? Looking forward to the new version.


Best regards,
Lingling Yin, Research Assistant
University of Houston
5000 Gulf Freeway Bldg. 3, Rm. 152-B
Houston, TX 77204-0931
United States of America

Jason.Jonkman
Posts: 4623
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: NREL 5MW controls (DLL interface)

Postby Jason.Jonkman » Fri Mar 28, 2014 8:54 am

Dear Lingling,

While I haven't run the SNL 13.2-MW model myself, I have not heard others complain of similar problems. My guess is the problem is with your operational condition -- running a simulation involving the turbine operating with a fixed pich of 50 degrees. Why do you want to simulate at this condition? Do you have similar problems when running simulations at more normal conditions?

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

Lingling.Yin
Posts: 57
Joined: Wed Jan 23, 2013 12:47 pm
Organization: University of Houston
Location: Houston

Re: NREL 5MW controls (DLL interface)

Postby Lingling.Yin » Fri Mar 28, 2014 10:23 am

Dear Jason,

Really appreciate!

No problem at all in other normal conditions! I just want to take a look of the pitch sensitivity of this rotor. I may skip this angle for time being!

Best regards,
Lingling Yin, Research Assistant
University of Houston
5000 Gulf Freeway Bldg. 3, Rm. 152-B
Houston, TX 77204-0931
United States of America

Mani.Kandan
Posts: 22
Joined: Tue Jun 26, 2012 10:22 am
Organization: Indian Institute of Technology Madras
Location: India

Re: NREL 1.5MW controls (DLL interface)

Postby Mani.Kandan » Mon Jul 06, 2015 1:50 am

Hi:

I am a new FAST user, and I tested the CART3 1.5MW turbine.But when i tried to run it in command prompt it shows like the following image.

Jason.Jonkman
Posts: 4623
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: NREL 5MW controls (DLL interface)

Postby Jason.Jonkman » Mon Jul 06, 2015 6:33 am

Dear Mani,

Your image does not show up.

Also, I'm not aware of a CART3 1.5-MW turbine. Do you mean the CART3 600-kW turbine, the WindPACT 1.5-MW turbine, or something else?

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

Thanasis.Petridis
Posts: 11
Joined: Sun Nov 25, 2018 7:02 pm
Organization: Aristotle University of Thessaloniki
Location: Greece

Re: NREL 5MW controls (DLL interface)

Postby Thanasis.Petridis » Sat Feb 09, 2019 3:40 pm

Mr. Jonkman hi,

I ecountered some problems which I still haven't solved and I would appreciate your help.

First of all, I use your 5-MW offshore wind turbine as a model. I modified it for my site (15m depth, 92.6m Hub height, tower height 77.6m). So, as you can see the differences are just small. I created wind files using TurbSim for wind speeds (4 different load cases):
1)11.4 m/s (ETM)
2)25 m/s (ETM)
3)41.6 m/s (NTM)
4)43.7 m/s (NTM)

I now use FAST_v7.02.00d-bjj_AeroDyn_v13.00.02a-bjj_BladedDLLInterface with all your files included and my wind files in it. I modified just a few things due to my different structure.

1) case works well with no problems at all. The 3 other cases all have a warning message
WARNING: Small angle assumption violated in SUBROUTINE SmllRotTrans() due to a large blade
deflection. The solution may be inaccurate. Simulation continuing, but future warnings will be
suppressed.

Time step is 0.0125 and tried 0.00125 too in 630 sec simulation. The grid width-height in TurbSim are 145m
Maybe the warning is due to sudden loading of blades as mentioned above?

Also another problem I encountered is that even with a wind speed of 41.6 m/s at hub height somehow the turbine still works and generates power.

Time_____WindVxi____WindVyi_____WindVzi______WaveElev___GenPwr_______GenTq_______OoPDefl1____IPDefl1
(s)_______(m/s)______(m/s)_______(m/s) ________(m)________(kW)_________(kN·m)_______(m)_________(m)
30.000___4.183E+01__5.555E-01____-6.911E+00___-1.536E-01___4.928E+03____4.365E+01____-4.981E-01___3.213E-01
30.013__4.164E+01___3.778E-01____-6.593E+00___-1.524E-01___4.923E+03____4.366E+01____-4.763E-01___2.920E-01
30.025__4.173E+01___3.102E-01____-5.903E+00___-1.512E-01___4.918E+03____4.367E+01____-4.541E-01___2.624E-01
30.038__4.182E+01___2.426E-01____-5.214E+00___-1.500E-01___4.912E+03____4.368E+01____-4.310E-01___2.323E-01
30.050__4.192E+01___1.750E-01____-4.525E+00___-1.488E-01___4.908E+03____4.370E+01____-4.080E-01___2.026E-01
...
335.775__4.483E+01__-1.832E+00___-1.745E+00___1.972E+00___5.041E+03____4.572E+01____-1.358E+00___1.753E+00
...
406.400__3.852E+01__-4.748E+00___-1.277E+00___4.940E-02___4.865E+03____4.579E+01____-1.230E+00___1.426E+00
...
593.513__4.830E+01__3.494E+00____-6.235E-01___2.945E-01___4.946E+03____3.875E+01____-3.824E+00___3.580E+00

Shouldn't the turbine be offline since the wind speed has by far surpassed the cut-out speed?

I'm sorry if my question is dumb, but I really don't know where to look for this kind of problem.

Best regards,

Thanasis Petridis

Jason.Jonkman
Posts: 4623
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: NREL 5MW controls (DLL interface)

Postby Jason.Jonkman » Mon Feb 11, 2019 9:49 am

Dear Thanasis,

Regarding your first question, I think this same question has been answered in my post dated Oct 01, 2009 in the following forum topic: viewtopic.php?f=4&t=272&p=785.

Regarding your section question, the baseline controller for the NREL 5-MW turbine includes logic only for normal operation; the controller will not shut down the turbine in high winds. Instead, for load cases above the cut-out speed, you should set up the FAST simulation so that the turbine is idling (blade-pitch and generator-torque disabled, blade-pitch angles feathered to 90 degrees, induction and unsteady airfoil aerodynamic disabled).

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


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