EGRET is a Python-based package for electrical grid optimization based on the Pyomo optimization modeling language. EGRET is designed to be friendly for performing high-level analysis (e.g., as an engine for solving different optimization formulations), while also providing flexibility for researchers to rapidly explore new optimization formulations.
Major features:
- Solution of Unit-Commitment problems
- Solution of Economic Dispatch (optimal power flow) problems (e.g., DCOPF, ACOPF)
- Library of different problem formulations and approximations
- Generic handling of data across model formulations
- Declarative model representation to support formulation development
EGRET is available under the BSD License (see LICENSE.txt)
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EGRET is a Python package and therefore requires a Python installation. We recommend using Anaconda with the latest Python (https://www.anaconda.com/distribution/).
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These installation instructions assume that you have a recent version of Pyomo installed, in addition to a suite of relevant solvers (see www.pyomo.org for additional details).
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Download (or clone) EGRET from this GitHub site.
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From the main EGRET folder (i.e., the folder containing setup.py), use a terminal (or the Anaconda prompt for Windows users) to run setup.py to install EGRET into your Python installation - as follows:
pip install -e .
- Pyomo version 5.6 or later
- pytest
- Optimization solvers for Pyomo - specific requirements depends on the models being solved. EGRET is tested with Gurobi or CPLEX for MIP-based problems (e.g., unit commitment) and Ipopt (with HSL linear solvers) for NLP problems.
We additionally recommend that EGRET users install the open source CBC MIP solver. The specific mechanics of installing CBC are platform-specific. When using Anaconda on Linux and Mac platforms, this can be accomplished simply by:
conda install -c conda-forge coincbc
The COIN-OR organization - who developers CBC - also provides pre-built binaries for a full range of platforms on https://bintray.com/coin-or/download.
To test the functionality of the unit commitment aspects of EGRET, execute the following command from the EGRET models/tests sub-directory:
pytest test_unit_commitment.py
By default, the unit commitment tests will only execute on LP relaxations of the full MIP. This default allows for tests to execute more quickly. The output from this command should look something like:
====================================================================== test session starts ======================================================================
platform darwin -- Python 3.7.3, pytest-4.4.1, py-1.8.0, pluggy-0.11.0
rootdir: /home/some-user/egret
collected 14 items
test_unit_commitment.py s............. [100%]
============================================================ 13 passed, 1 skipped in 125.02 seconds =============================================================
To run the full test suite, without LP relaxations of the unit commitment MIPs, execute the following command from the EGRET models/test sub-directory:
pytest --runmip test_unit_commitment
The output from this command should look something like:
====================================================================== test session starts ======================================================================
platform darwin -- Python 3.7.3, pytest-4.4.1, py-1.8.0, pluggy-0.11.0
rootdir: /home/some-user/egret
collected 14 items
test_unit_commitment.py .............. [100%]
================================================================== 14 passed in 352.67 seconds ==================================================================
If you are using the unit commitment functionality of EGRET, please cite the following paper: http://www.optimization-online.org/DB_HTML/2018/11/6930.html.