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Antares-Xpansion changelog

v1.3.0 (06/2024)

Features

Embedding Mpi in Windows Allow sensitivity study to run unzipped study First Implementation of Benders Outer Loop

Bug Fixes

Duplicate Xpress loading messages remove whitespace from Xpress path on Windows fix truncated xpress path on linux

v1.2.2 (02/2024)

  • Update Antares simulator to 8.8.3

v1.2 (10/2023)

Features

  • Support "named mps" from Antares simulator
  • Use Antares Simulator 8.8.0-rc2

Bug fixes

  • Fix issue on windows with concurrent access to log files

v1.1.1 (09/2023)

Fix

  • Update performance graph in the documentation

v1.1.0 (09/2023)

Features

  • Implementation of the Benders by batch algorithm : performance improvements over the classical Benders algorithm
  • New parameter batch_size in settings.ini to tune the Benders by batch algorithm, more details here
  • Logs improvements:
    • Print user and hostname in the standard output and in reportbenders.txt
    • Print both walltime and cumulative CPU time for subproblems resolution

For developers

  • MPI dependency is now mandatory as benderssequential and bendersmpi have been merged in a single benders executable

v1.0.3 (02/2023)

Features

  • Use Antares-Simulator 8.5.0

Bug

  • Fix sensitivity not working with AntaresWeb

v1.0.2 (01/2023)

Bug fix

  • Fix missing performance graph from release

v1.0.1 (01/2023)

Features

  • Use Antares-Simulator 8.4.2

v1.0.0 (12/2022)

Features

  • Use Antares-Simulator 8.4.1
  • Performance improvement in execution time
    • In-out stabilisation of the Benders algorithm : new parameters separation_parameter and relaxed_optimality_gap to tune the stabilization, more information here
    • Parallelization of the problem_generation step
  • Performance improvement in disk space consumption : in full run mode i.e with option --step full (default behavior), Antares-Xpansion outputs are zipped within Antares study archive
  • Change the default value of relative_gap from 1e-12 to 1e-6

Documentation

v0.8.0 (10/2022)

Features

  • Use Antares-Simulator 8.2.2
  • Allow the use of different chronicles of link profile for each Monte-Carlo year. More information here
  • New directories to store additional constraints files and weights files:
    • Additional constraints files must be stored in user/expansion/constraints
    • Weights files must be stored in user/expansion/weights

Bug fixes

  • Allow the capa folder to be missing if unused
  • The algorithm now properly stops after max_iteration instead of max_iteration + 1 iterations

v0.7.0 (06/2022)

Features

  • Add the possibility to perform sensitivity studies on optimal investment solutions
  • Antares-Xpansion outputs are written in the expansion directory instead of the lp directory
  • Add timelimit option as a stopping criterion for the Antares-Xpansion algorithm
  • Add log_level option to choose the verbosity level of the solver
  • Add resume step, to provide the possibility to resume an unfinished study
  • Bump antares version used by Xpansion to 8.1.1

Bug fixes

For developers

  • Remove documentation generation with doxygen
  • Use C++17

v0.6.0 (12/2021)

Features

  • Antares-Xpansion is now compatible with Antares v8.1 studies
  • Add relative_gap option as a stopping criterion for the Antares-Xpansion algorithm
  • Add --antares-n-cpu option to use Antares-Simulator parallelism
  • Add -v, --version option to show Antares-Xpansion version
  • Add --antares-version option to show Antares-Simulator version
  • Add mergeMPS option to use a frontal resolution of the investment problem instead of Benders decomposition
  • Add --installDir option to be able to launch Antares-Xpansion from another directory than its own
  • Set default value of --simulationName to last in order to use the last Antares simulation

Bug fixes

  • Path to binaries directory was not found in some situations with python launcher and in python exclusive package
  • Correct bug when there are too many zeros in a link-profile

For developers

  • cpp lpnamer library is split into smaller and consistent libraries
  • Each Antares-Xpansion step has its own driver (python class) instead of the all-in driver
  • Upgrade to a new version of antares-deps (bug fix)

v0.5.0 (10/2021)

Features

  • In benders optimization, master problem .mps is written after each resolution
  • Several investment candidates on the same link
  • Review of candidates.ini file content (remove has-link-profile and add enable feature)

Bug fixes

  • Option keepMps was still removing some files needed for lp step
  • Correction of lp step call if it was the only step asked by user
  • Correction of optimization if hurdles cost were used in Antares-Simulator
  • Correction of optimization with binary additionnal constraint between investment candidates

For developers

  • Fix mergemps optimization in debug mode
  • Fix vcpkg on Github Actions
  • Add build cache for Github Actions (Ubuntu only) to speed up the build
  • Add sonarcloud analysis
  • Use of docker image for build on centos7
  • Add read-the-docs documentation
  • Generation of pdf user guide from read-the-docs documentation
  • Update Cmake to support Xpress on centos7

v0.4.0 (07/2021)

Features

  • A new multi solver interface is introduced, we no longer use OR-tools
  • The user can choose different solvers
  • The optimality gap is no longer hard-coded and the user can define it in the inputs
  • In case of unfeasible problems, the program now prints a console and file outputs
  • Solver traces can be activated by specific option in benders/bendersmpi console applications
  • Benders console information are now also printed on a specific file

Bug fixes

  • Remove erroneus value from the "problem_status" entry of the output json file
  • Fix display of overall cost of the best solutions

v0.3.0 (05/2021)

Features

  • Add yearly-weights file support to define a weight for each antares study MC years
  • Clean of intermediate result file after each simulation step
  • Creation of a Antares-Xpansion version with only one executable

Bug fixes

  • Use study stored in mount network drive
  • Problem accepting capital letters in candidate areas
  • Small alignment fix in output

v0.2.0 (04/2021)

Features

  • Add update step to update antares study links with calculated investments

Bug fixes

  • Invalid best iteration display in logs
  • Rounding problem in writing MPS with OR-tools
  • Antares-Xpansion can't be launched twice at the same time
  • Windows: Add Microsoft Visual Studio needed redistribuable to installer
  • Linux: wrong antares-solver executable permission and install directory

v0.1.0 (03/2021)

We’re happy to announce the first open-source version v0.1.0 of Antares-Xpansion. Antares-Xpansion optimizes the installed capacities of an Antares study.

The investment decisions are optimized by running Antares' simulations iteratively. At each iteration, the installed capacity of the investments are updated, and the simulations are repeated until the total costs have converged to a minimum. The total cost evaluated in this problem are the sum of the expected operation cost during one year and the investment annuity. The user defines investment candidates. Candidate capacities for investment are necessarily links from an Antares study. Investment candidates can be: - transmission capacity between two areas - thermal generation capacity (located in a virtual node) - renewable generation capacity (located in a virtual node) - or even flexibilities (located in virtual nodes)

Notes

This version is only compatible with Antares v8.0 Antares-Simulator. The Antares binaries needed by Antares-Xpansion are available in the installation package of Antares-Xpansion.

An annual cost, a potential, a link-profile or an already-installed-capacity can be defined for each candidate. Linear constraints between the invested capacities of investment candidates can also be imposed.

The optimization is launched from the command prompt, where the details of the iterations are displayed.

The optimization can be launched on large studies. Computing performance can be improved by using MPI.