Wind Farm - Fast

Hello everybody,

I have the following problem: I would like to design a simple control for two turbines, using the output data of the first one as the inflow of the second one. Is it possible to run a simulation using FAST, including the two turbines and independent control for the two turbine? (In simulink using S-Func would be great.)

Best regards,
Federico

Dear Federico,

FAST standalone cannot be used to model two turbines, but NREL has developed SOWFA and the soon-to-be-released FAST.Farm tool for that purpose. And UMass developed DWM. More information e.g. at: http://forums.nrel.gov/t/simulating-two-turbines-one-behind-the-other/1168/14.

That said, neither SOWFA, DWM, or FAST.Farm support an interface to Simulink.

Best regards,

Dear Jason,

Thank you for your answer. News on FAST.farm? I have seen that the expected release was scheduled for September.

Best regards,
Federico.

Dear Federico,

We are currently working on calibrating and validating FAST.Farm against high-fidelity modeling (SOWFA) results before the first public release. We were originally planning for the public release at the end of September, 2017, but we are not as far along with the validation as we’d like. Now I’m expecting the first public release later this fall.

Best regards,

Dear Jason,

I was wondering how I can download the FAST.farm code frmo NREL’s website (is there a donwload link?). Could you please advise?

Also, are there any manuals, documents or instructions on how to work with it?

Dear Elham,

FAST.Farm has not yet been publicly released. See the following forum topic for more information: http://forums.nrel.gov/t/fast-farm/1887/13.

Best regards,

Dear Jason,

You mention in this response that neither SOWFA, DWM or FAST.Farm support an interface with Simulink. Are there plans to develop such interface in future?

Also, is there a way to run 5 MW offshore turbine through DWM, while controlling it externally through Simulink or else editing the internal FAST control algorithms to suit my needs?

regards,
Narender Singh

Dear Narender,

We would like to develop a Simulink interface for FAST.Farm at some point, but we are not currently funded to do that. Currently, FAST.Farm and SOWFA can accept controllers implemented through the other controller interfaces (i.e., simple built-in controllers, Fortran routines, or Bladed-style DISCON DLL). The super controller of FAST.Farm and SOWFA is based on an extension of the Bladed-style DISCON DLL.

NREL does not really support DWM, which will be deprecated soon.

Best regards,

Dear Jason,

Could you please also share the prerelease with me?

regards,
Liye Zhao

Dear Liye.Zhao,

FAST.Farm has now been merged into the dev branch of OpenFAST (github.com/OpenFAST/openfast/tree/dev). So, you can now find the source code, documentation, and sample models there. I’ll announce the release formally once FAST.Farm gets merged to the main branch of OpenFAST.

Best regards,

Dear Jason,

I met annother problem recently. I try to use turbsim generate the ambient wind data(Binary TurbSim Full-Field files), i have no idea about some parameters ,such as NumGrid_Z/Y ? When i set the following parameters (as i shown in the figure 1),

i can’t use this full-field file, can you give me some suggestions, please?

In my understanding, the grid of turbsim should cover the grid set in ambient wind in the fstf file, right? This is equivalent to atmospheric turbulence covering the entire wind field?

Best regards,

Dear Jundong,

The access violation issue you are referring to seems identical to the one discussed on OpenFAST issues (github.com/OpenFAST/openfast/pull/769, not yet migrated to main).

Regarding the use of TurbSim within FAST.Farm, with Mod_AbmWind = 2, the same TurbSim field is used for both the low- and high-resolution domains of FAST.Farm and with Mod_AmbWind = 3, different TurbSim fields are used for the low-resolution domain and for each high-resolution domain. More information on this, and guidance for using TurbSim in conjunction with FAST.Farm, are provided in the FAST.Farm User’s Guide and Theory Manual: openfast.readthedocs.io/en/main … index.html.

Best regards,