Shut down some turbines

[ElieKadoche]

Hello! I wonder if it is possible to shut down some turbines during a simulation? Considering the same layout, we could define a list of indexes corresponding to the turbines off. Of course, it should affect the wind flow. I could not find the feature in FLORIS. Is there such a feature? If not, would it be a good / pertinent future development?

[Bartdoekemeijer]

Hi @ElieKadoche. In theory this is possible right now with a work-around. You can modify the power and thrust curves for each turbine individually. For the turbines that you want to shut down, you can set the turbine performance curves cp=0.0 and ct=0.001 for all wind speeds. This will still model the turbines but their power production will be 0.0 and their wakes will be negligible. You can code this up in a similar fashion as #399.

Hope this helps,
Bart

[ElieKadoche]

Thank you for the answer @Bartdoekemeijer. But if I am right, to keep the ability of FLORIS to vectorize its computations on different wind directions and speeds, changing the power and thrust curves is not enough? In such case, are the modifications described below would be the good approach? If I am going towards the good direction with such approach, I would be happy to give it a try and eventually make a pull request.

• Add an array turbines_off similar to yaw_angles in the calculate_wake() function.
• Modify the code of the solver functions (file solver.py) s.t. ct_i = 0.001 for the (sorted) turbines off.
• Modify the code of the get_turbine_powers() function to set the power output of turbines off to 0.0 MWs.

[paulf81]

hi @ElieKadoche and @Bartdoekemeijer , this will be handled directly in 4.0, so assigning to that milestone

[paulf81]

(Reposting from #693)
@ElieKadoche @Bartdoekemeijer @misi9170 @rafmudaf , we've created a new pull request where we've adapted the proposed changes of this pull request into the new v4 framework where we believe this fits really nicely. I adapted the provided example and interface changes and it should function the same way. Hope that this works for you!

[paulf81]

Closing this issue given #799