Tuning ROSCO without FAST Files

[MaximilienAndre]

Dear all,

I am fearly new to ROSCO and as I move through the tutorials there is something I would like to understand.

When running this lines (exemple 03 )

# Instantiate turbine, controller, and file processing classes
turbine         = ROSCO_turbine.Turbine(turbine_params)
controller      = ROSCO_controller.Controller(controller_params)

# Load turbine data from OpenFAST and rotor performance text file
cp_filename = os.path.join(tune_dir,path_params['rotor_performance_filename'])
turbine.load_from_fast(
    path_params['FAST_InputFile'],
    os.path.join(tune_dir,path_params['FAST_directory']),
    rot_source='txt',txt_filename= cp_filename
    )

I understand that we are defining a turbine object, that will be used so that the controler is appropriately tuned for this turbine. What I don't understand is what parameters are necessary from the turbine object. Apparently the parameters from the YAML file are not enough because if I comment the turbine.load_from_fast line the tuning function returns errors.

So if I understand correctly, we are loading parameters both from the YAML file and from the FAST Files. So my question is what parameters from the fast files are being used ? A subsidiary question is, let's say I have a new turbine model without associated fast files. How can I tune ROSCO for this turbine without having to develop a full OpenFAST model for it ?

Best,

Maximilien

[dzalkind]

Hi Maximilien,

Sorry for the delay.

I recommend reviewing the ROSCO turbine class. Here is where the OpenFAST information is read:

ROSCO/rosco/toolbox/turbine.py

Line 203 in 7deb583

self.TipRad = fast.fst_vt['ElastoDyn']['TipRad']

I would try populating the attributes of the ROSCO turbine object with the information gleaned from OpenFAST in another way. Here is an example: https://github.com/WISDEM/WEIS/blob/394d9223dea784bac68eca7fc9be9f846516f841/weis/control/tune_rosco.py#L230

Best, Dan

[MaximilienAndre]

Dear Dan,

Thank you for your answer, I will look at the ROSCO turbine class and see if I can set all the parameters myself.

Best, Maximilien