enable usage of Highs solver

documentation/changelog.rst

@@ -27,8 +27,7 @@ Infrastructure / Support
 * Add support for profiling Flask API calls using ``pyinstrument`` (if installed). Can be enabled by setting the environment variable ``FLEXMEASURES_PROFILE_REQUESTS`` to ``True`` [see `PR #722 <https://www.github.com/FlexMeasures/flexmeasures/pull/722>`_]
 * The endpoint `[POST] /health/ready <api/v3_0.html#get--api-v3_0-health-ready>`_ returns the status of the Redis connection, if configured [see `PR #699 <https://www.github.com/FlexMeasures/flexmeasures/pull/699>`_]
 * Document the `device_scheduler` linear program [see `PR #764 <https://www.github.com/FlexMeasures/flexmeasures/pull/764>`_].
-
-/api/v3_0/health/ready
+* Add support for `Highs <https://highs.dev/>`_ solver [see `PR #766 <https://www.github.com/FlexMeasures/flexmeasures/pull/766>`_].
 
 v0.14.1 | June 26, 2023
 ============================

documentation/configuration.rst

@@ -55,7 +55,7 @@ Default: ``False``
 FLEXMEASURES_LP_SOLVER
 ^^^^^^^^^^^^^^^^^^^^^^
 
-The command to run the scheduling solver. This is the executable command which FlexMeasures calls via the `pyomo library <http://www.pyomo.org/>`_. Other values might be ``cplex`` or ``glpk``. Consult `their documentation <https://pyomo.readthedocs.io/en/stable/solving_pyomo_models.html#supported-solvers>`_ to learn more. 
+The command to run the scheduling solver. This is the executable command which FlexMeasures calls via the `pyomo library <http://www.pyomo.org/>`_. Other values might be ``cplex``, ``glpk`` or ``appsi_highs`` for `Highs <https://highs.dev/>`_. Consult `their documentation <https://pyomo.readthedocs.io/en/stable/solving_pyomo_models.html#supported-solvers>`_ to learn more. 
 
 Default: ``"cbc"``
 

requirements/app.in

@@ -68,3 +68,4 @@ Flask-SQLAlchemy>=2.4.3,<3
 # <2.3: https://github.com/Parallels/rq-dashboard/issues/417 and https://github.com/FlexMeasures/flexmeasures/issues/754 and flask-login 0.6.1 not compatible
 flask>=1.0, <=2.1.2
 werkzeug<=2.1
+highspy

requirements/app.txt

@@ -109,6 +109,8 @@ fonttools==4.40.0
     # via matplotlib
 greenlet==2.0.2
     # via sqlalchemy
+highspy==1.5.3
+    # via -r requirements/app.in
 humanize==4.7.0
     # via -r requirements/app.in
 idna==3.4