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Release notes

Version 0.3.0 (2026-04-16)

Breaking changes

  • Adjusted to EnergyModelsBase v0.10.0 and EnergyModelsRenewableProducers v0.7.0:
    • Breaking change required as early retirement is now allowed.
    • Early retirement changes the model behavior.
    • Model worked without adjustments except for compatibility updates.
    • Breaking change still included to maintain the possibility to do bug fixes in version 0.1.x for existing models with EnergyModelsBase v0.9.x.
    • UpdMoved from Data to ExtensionData in fields and tests.
  • Improved MinUpDownTimeNode:
    • Rewrote the function constraints_capacity based on core functionality.
    • Updated the test set to identify all potential problems with the node.
    • Renamed field names of the type.

Additional changes

  • Updated CI versions.
  • Fixed errors in the documentation.

Version 0.2.11 (2026-02-16)

Enhancements

  • Extended the link CapacityCostLink to also accept a vector of durations for the individual sub periods.

Version 0.2.10 (2026-01-05)

Enhancements

  • Added the new link CapacityCostLink.
  • Added the nodes InflexibleSource and FlexibleOutput.

Adjustments

  • Removed ext/EMGUIExt/descriptive_names.yml as this will now be provided directly in EnergyModelsGUI.
  • Removed docs/src/example/flexible_demand.md as the markdown versions of the example files are now generated automatically (and these are thus added to the .gitignore-file).

Version 0.2.9 (2025-07-08)

  • Adjusted to EnergyModelsBase v0.9.0:
    • Increased version number for EMB.
    • Replaced variables_node with variables_element.

Bugfix

  • Fixed a bug in MultipleInputStrat nodes:
    • The variables were declared over all input resources of a nodes of this type.
    • As a consequence, unconstrained variables were declared when multiple nodes with differing inputs were included.
    • In the worst case, this could lead to an unbound problem if the surplus penalty was negative.

Version 0.2.8 (2025-07-04)

Public release on GitHub

  • Released the exisiting version so that case studies in the project FLEX4FACT are running without any problems.
  • Release depends on old versions of EnergyModelsBase.
  • It is planned to update the model to the latest version within a short period of time.

Version 0.2.7 (2025-01-14)

Enhancement

  • Add a Combustion node

Version 0.2.6 (2025-01-18)

Enhancement

  • Added more checks, documentation and tests.
  • Replaced Combustion with LimitedFlexibleInput where the inverse convention of the conversion ratio is used for the input resources.
  • Renamed AbstractMachineryDemand to AbstractMultipleInputSinkStrat with AbstractMultipleInputSink as supertype.
  • Renamed BinaryMachineryDemand and ContinuousMachineryDemand to BinaryMultipleInputSinkStrat and ContinuousMultipleInputSinkStrat, respectively. Also generalized the electrification variable to the variable input_frac_strat which enables more input resources.
  • Add documentation, NEWS and README.
  • Adjusted code to comply with Aqua requirements and to comply with EMX standards.
  • Added descriptive names for variables introduced in EnergyModelsFlex to be used in EnergyModelsGUI.
  • Added new nodes for SPS, remove redundant constraint for PayAsProducedPPA and dispatch on AbstractNonDisRES (instead of Source).
  • Improve documentation of LoadShiftingNode, use Int-type where appropriate and fix minor bug in load shift constraints.

Version 0.2.5 (2024-11-12)

Enhancement

  • Add SPS nodes.

Version 0.2.4 (2024-11-01)

Enhancement

  • Add PayAsProducedPPA node.

Version 0.2.3 (2024-10-29)

Enhancement

  • Version update.

Version 0.2.2 (2024-10-10)

Enhancement

  • Create an abstract base type for PeriodDemandSink.

Version 0.2.1 (2024-10-09)

Enhancement

  • Add demand_sink_surplus slack variable.

Version 0.2.0 (2024-10-08)

Enhancement

  • BatteryStorage cant be included before it is updated to EnergyModelsBase v0.8.0.

Version 0.1.1 (2024-06-18)

Enhancement

  • Make BatteryStorage work when included in investment models, note that investments in BatteryStorage needs further development.

Version 0.1.0 (2024-04-16)

Initial (skeleton) version

  • Make it into a package.