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Release notes

Version 0.8.1 (2024-10-24)

Bugfix RollingLife

  • The lifetime mode RollingLife experienced problems in situations in which investments of multiple investment periods should be retired in the same investment period.
  • In this situation, we did not calculate the minimum removal correctly.
  • This is fixed and a test included to identify these problems in future iterations.

Version 0.8.0 (2024-10-16)

Rework of initial capacities

  • Implemented potential for decreasing initial capacities.
  • This resulted in changes for BinaryInvestment and FixedInvestment in which the provided capacity fields come in addition to the existing capacities. This allows for a reduction in the initial capacity.

Rework of tests

  • The dependency of the tests from EnergyModelsBase was removed to avoid a hen-egg problem regarding registering.
  • The tests were furthermore reworked to test all potential combinations.

Bugfixes

  • Fixed bugs when the lifetime of a RollingLife technology was shorter or equal to the duration of a strategic period.

Rework of documentation

  • Restructured both the public and internal libraries.
  • Updated the docstrings to simplify the understanding of the different functions.

Other

Version 0.7.1 (2024-08-26)

  • Bugfix in RollingLife in a situation, in which the duration of a strategic period equals the lifetime of the technology. A test was added to avoid this type of problem in the future

Version 0.7.0 (2024-08-20)

Making EnergyModelsInvestments independent of EnergyModelsBase

  • Version 0.6 of EMI provided the base for making EMI independent of EMB.
  • This approach was now utilized for moving all EMB specific functions to an extension of EMB.
  • In the new version, EMI can be used in any model with investments, given that some functions are provided by the developer of said models.

Other

  • Use dev version of EMI for examples when running as part of tests, similar to PR #33 of EMB.

Version 0.6.0 (2024-05-24)

Changes in handling of investments

  • Allow investments in all Storage capacities introduced in EnergyModelsBase v0.6 through new type StorageInvData.
  • Changed the structure of investment data to prepare for making EnergyModelsInvestments independent from EnergyModelsBase.
  • Utilize now the same functions for investment in all type of Nodes and TransmissionModes.
  • Utilize the same type (SingleInvData) for investment data in all type of Nodes (except Storage) and TransmissionModes.
  • Moved parameters that are investment mode specific as fields to the investment mode.
  • Allow for semi-continuous offset investments for Nodes.

Version 0.5.5 (2024-05-02)

Bugfix

  • Fixed two bugs in the calculation of the OPEX contribution to the objective function for TransmissionMode:
    • Switched to average discounting and
    • Added the multiplication of the OPEX contribution with duration(t_inv) to account for varying lengths of strategic periods.

Miscellaneous

  • Updated a link in the documentation for the examples.
  • Provided a contribution section in the documentation.

Version 0.5.4 (2024-03-21)

Checks

  • Adjusted function EMB.check_node_data to changed method call in EnergyModelsBase.
  • Allow for jumping over the check regarding the StrategicProfile structure in InvData and InvDataStorage with a conditional argument. The other checks regarding the profiles remain unchanged as a wrong TimeProfile there would lead to an error within TimeStruct.
  • Moved the checks for strategic indexing to EnergyModelsBase.

Bugfix

  • Fixed a bug for the function start_cap in EMIGeoExt, where there could be ambiguity with the function start_cap in EnergyModelsInvestments.

Version 0.5.3 (2024-03-06)

Examples

  • Fixed a bug when running the examples from a non-cloned version of EnergyModelsInvestments.
  • This was achieved through a separate Project.toml in the examples.

Bugfixes

  • Fixed a bug for semi-continuous investments for Storage nodes. Now it is possible using this InvestmentMode to only invest in storage capacity or storage rate.
  • Fixed a bug for method ambiguity when Storage nodes use DiscreteInvestment.

Checks

  • Updated the check systems based on changes introduced in EnergyModelsBase v 0.6.6.
  • Included tests for all checks to be certain that the checks are providing the required output.

Tests

  • Restructured the test folder and the individual tests.
  • Added tests for Storage investment.

Minor changes

  • Moved EMIGeoExt to a separate folder within the extension folder.

Version 0.5.2 (2024-02-15)

Bugfix

  • Fixed the function for extracting the field capex_trans_offset in TransInvData.

Version 0.5.1 (2024-01-17)

Feature

  • Added the JuMP model m and modeltype as arguments to the start-capacity methods.

Version 0.5.0 (2023-12-19)

Adjustment

Adjusted to changes in EnergyModelsBase v0.6. These changes are mainly:

  • All fields of composite types are now lower case.
  • An extensive number of functions to access the individual fields were included, allowing for differing definitions of the individual nodes.

In addition this version includes:

  • A rewriting of the calculation of the objective function.

Version 0.4.6 (2023-11-23)

Bugfix

  • Added investment period duration multiplication for emissions prices.

Version 0.4.5 (2023-10-24)

Bugfix

  • Include opex for transmission modes without investments.

Version 0.4.4 (2023-09-15)

Bugfix

  • Use correct index on parameter values.

Version 0.4.3 (2023-09-08)

Bugfix

  • Bugfix from v0.4.1 RollingLife was reverted due to rebasing in v0.4.2. This was fixed.

Version 0.4.2 (2023-08-24)

Changes in discounting

  • Previously, strategic periods were discounted using the start year for both OPEX and CAPEX.
  • This was changed for OPEX and emission cost calculations to account for longer strategic periods.

Version 0.4.1 (2023-08-02)

Bugfix

  • Included calling of strategic_periods in ::RollingLife which was missing.

Version 0.4.0 (2023-06-06)

Switch to TimeStruct.jl

  • Switched the time structure representation to TimeStruct
  • TimeStruct is implemented with only the basis features that were available in TimeStructures, This implies that neither operational nor strategic uncertainty is included in the model.

Version 0.3.2 (2023-06-01)

  • Bugfix related to FixedInvestment.

Version 0.3.1 (2023-06-01)

  • Added dispatch on has_investment in the extension instead of defining a new, local function.

Version 0.3.0 (2023-05-xx)

  • Adjustment to changes in EnergyModelsBase v0.4.0 and EnergyModelsGeography v 0.6.0.
  • The new filter method for data can be used as example for subsequent usage of Array{Data}.
  • Migrate from Requires.jl to support for weak dependencies in julia v1.9.

Version 0.2.8 (2023-05-15)

  • Fixed a bug that could lead to method ambiguity errors when a subtype of Storage required additional variables. This solution results in significant changes regarding where and how variables and constraints are declared.

Version 0.2.7 (2023-04-27)

  • Requirements changed to ^0.5.0 for EnergyModelsGeography.

Version 0.2.6 (2023-04-24)

  • Introduction of abstract type InvestmentData as subtype of Data to dispatch specifically on data related to investments.
  • Changes in the individual utility functions for improved utilization of the multiple dispatch.

Version 0.2.5 (2023-04-18)

  • Bugfix related to constraint on cap_use, stor_rate_use, and stor_level:
    • The variables are constrained using the function constraints_capacity and in addition in constraints_capacity_invest and constraints_storage_invest with the latter constraint being inconsistent for Sink nodes.
    • The constraint in EnergyModelsInvestments was therefore removed.

Version 0.2.4 (2023-03-31)

  • Removal of type ContinuousFixedInvestment as this can be represented with ContinuousInvestment and Cap_max_add limited to a given period.
  • Introduction of abstract type SemiContiInvestment and composite type SemiContinuousOffsetInvestment to introduce semi-continuous investments in which the cost function has an offset. This is only included for Transmission in the first step.

Version 0.2.3 (2023-03-20)

  • Adjustments in tests and functions to changes introduced in EnergyModelsGeography version 0.4.0.

Version 0.2.2 (2023-02-17)

  • Adjustments in tests and functions to changes introduced in EnergyModelsGeography version 0.3.1.

Version 0.2.1 (2023-02-06)

  • Renaming of investment modes:
    • Rename DiscreteInvestment to BinaryInvestment.
    • Rename IntegerInvestment to DiscreteInvestment.

Version 0.2.0 (2023-02-03)

Adjustmends to updates in EnergyModelsBase

Adjustment to version 0.3.0, namely:

  • Changed type (Node) calls in tests to be consistent with version 0.3.0.
  • Changed call of function for the creation of Storage variables.
  • Removal of the type GlobalData and replacement with fields in the type InvestmentModel in all tests.

Version 0.1.5 (2022-12-12)

Internal release

  • Update Readme.

Version 0.1.4 (2022-12-09)

Changes in naming

  • Renamed dictionary keys from EnergyModelsInvestments to Investments.

Version 0.1.3 (2022-30-11)

Renamed to EnergyModelsInvestments

  • Renamed for more internally consistent package names.

Version 0.1.2 (2021-09-07)

Changes in naming

  • Major changes in both variable and parameter naming, check the commit message for an overview.

Version 0.1.1 (2021-08-20)

  • Inclusion for investment in storage (energy).
  • Changes to the datastructures.

Version 0.1.0 (2021-07-06)

  • Initial version.
  • Inclusion of discounting.