High oscillations in system "IEA-15-240-RWT-Monopile"

Dear readers,

I am making my first steps with “OpenFAST-V3.5.0” on a Windows 10 machine.
I downloaded the “IEA-15-240-RWT-Monopile” turbine model from here:


and I use the controller library “libdiscon.dll” which I downloaded from here:


Now I have simulated a time series with a constant wind speed of 10 m/s.

So far, so good - but when I look at different signals, the whole turbine behaviour is very strange as you can see in the uploaded picture (there are high oscillations 8-9 Hz in the system) …

I guess it is an controller issue, but since I have used the downloaded model and dll and haven’t changed anything - I would not expect this strange behaviour.

Can someone please give me a clue what is going wrong here?
Thank you very much.

With kind regards,

Hello Heike,
The issue has been fixed in the develop branch of the IEA15 repo with this PR: Simple vs ctrl by ptrbortolotti · Pull Request #158 · IEAWindTask37/IEA-15-240-RWT · GitHub
I hope this helps.
best regards,

Dear Pietro,

thank you for much for your quick response :wink:
I checked out the updated model and now it looks much better :+1:

Here a screenshot of the updated time series:

Best Regards,