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Documentation of WHOC and ROSCO for super controller in FAST.Farm #3043

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andrew-platt merged 3 commits into from
Mar 2, 2026
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Documentation of WHOC and ROSCO for super controller in FAST.Farm #3043

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dae940c
Add documentation for the use of WHOC and ROSCO as FAST.Farm supercon…
abhineet-gupta Oct 23, 2025
3688f32
Address comments on PR #3043
abhineet-gupta Mar 1, 2026
04ee3a2
Modify link from whoc to hycon in FAST.Farm documentation
abhineet-gupta Mar 1, 2026
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26 changes: 26 additions & 0 deletions docs/source/user/fast.farm/Introduction.rst
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Expand Up @@ -373,6 +373,32 @@ FAST.Farm and OpenFAST can be read with standard open-source
visualization packages such as `ParaView <http://www.paraview.org/>`__
or `VisIt <https://wci.llnl.gov/simulation/computer-codes/visit/>`__.

Turbine controller and super controller
---------------------------------------

FAST.Farm does not include its own modules for individual turbine controllers
or farm-level controller (super controllers) but relies on
separately compiled routines for them.
FAST.Farm defers to the OpenFAST model of individual turbine for the turbine controller.
The controller is specified in the ServoDyn module of OpenFAST.
OpenFAST allows for the use of bladed-style controllers in DLL format.
Tools like `Reference Open Source Controller` (`ROSCO <https://github.com/NREL/ROSCO>`_)
can be used to design and integrate turbine controller in DLL format, if the user does not already have their own controller.

Farm-level super controller can be designed and implemented using external tools.
The `Hycon` (`Hycon <https://github.com/NatLabRockies/hycon>`_) tool
provides for rapid design of common farm-level controllers such as wake steering
control, spatial filtering/consensus and active power control etc.
Hycon includes examples demonstration the design of a wake steering controller and implementation on
a small farm using FAST.Farm.
The `Reference Open Source Controller` (`ROSCO <https://github.com/NREL/ROSCO>`_)
also has wind farm control capability.
It gives the user low-level access to various turbine measurements and offsets, and
enables implementation of user-written, python-based controllers.
ROSCO also includes examples demonstrating the implementation of a farm-level
controller in FAST.Farm.


FAST.Farm Parallelization
-------------------------

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9 changes: 0 additions & 9 deletions docs/source/user/fast.farm/ModelGuidance.rst
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Expand Up @@ -931,15 +931,6 @@ simulations for the NREL 5MW turbine
( :cite:`ff-Doubrawa18_1`), but these can be overwritten by the
user.

.. _FF:sec:SupCon:

Farm Level Control
------------------

FAST.Farm does not include a module for farm level control.
Users are advised to utilize the wind farm control capability of
the `Reference Open Source Controller` (`ROSCO <https://github.com/NREL/ROSCO>`_)
to implement farm level controller.

Commonly Encountered Errors
---------------------------
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