How to Utilize Predicted Wind Direction Data

[mohsamaz]

Hello everyone,
I am totally new in floris. it would be appritiated if you answer my question.

assume I have a prediction of wind direction, meaning I know the expected wind direction a few minutes before it actually changes.
in simplest case if there is just one wind turbine, How can I effectively apply this? Is it possible in floris.
I would appreciate any insights or guidance.

Best regards!

[misi9170]

Hi @mohsamaz ,

What would you like to do with the predicted wind direction? For example, are you asking whether it is possible to use that predicted wind direction to yaw the wind turbine?

Cheers,
Misha

[mohsamaz]

hello @misi9170,
yes, I want to use the predicted values to yaw the wind turbine.

Cheers,

[misi9170]

Ok. I suggest you take a look at this example (also here) to understand how to set the turbine yaw_angles. Yaw angles are defined as a misalignment away from the wind direction, specified in a counterclockwise direction---for example, if the wind direction is 270 degrees, and you would like the turbine to be "pointing" at 290 degrees, you would specify the yaw angle as -20 degrees. So, you can determine what angle the turbine would be at if it was using the predicted wind direction, rather than the current wind direction; compute the difference between the predicted and current wind directions; and set that as the turbine yaw angle.

However, please be aware that FLORIS is a steady-state model. There is no inbuilt time dependency. Because of that, if the yaw angle is set at a nonzero value (the difference between the predicted and current wind directions, for example), that yaw angle will simply be "wrong", in that it will mean the turbine is not aligned with the wind. Another way of thinking about this is that the wind conditions and turbine yaw angles can change "instantaneously" in FLORIS, because there is no time dependency. You may introduce a time dependency in the yaw angles if you like (by specifying that the yaw angles for one inflow condition (referred to as a findex in FLORIS) must not be very different from the yaw angles at the previous condition), however, the wind directions will not "propagate" through the domain---the wind direction is applied everywhere in the domain, instantaneously.

Misha

[mohsamaz]

Dear @misi9170,
I appreciate your help!
Cheers,