Bug fixes
- Fixing Excel input template
New features
- Updated documentation to match Toolbox changes
- New HiGHS version (1.8.1), should help with model getting stuck.
- Reorganising file structure to remove clutter from FlexTool root
- Some name changes in the workflow
- FlexTool has requirements.txt and pyproject.toml (allows pip install -e ., but not in pypi)
- Improved installation instructions (switched from miniconda to venv)
- Linux (Ubuntu tested) should work out of the box (but FlexTool execution only in work directory one scenario at a time!)
Bug fixes
- Excel input file to use entity_alternative
- unit_curtailment_share fix to Excel input
New features
- Existing capacity can be set for periods
- Cumulative limits for investments in nodes, units and connections
- New node_type that has period limit for inflow
- New highs solver version
- All parameter now have valid types. These are not enforced, but Spine Toolbox highlights parameters with a wrong type.
Bug fixes
- Several bugs related to the migration to Spine Toolbox 0.8.
- CPLEX call without pre_command fixed
- Timeline aggregarion without all timesteps
- User constraint including capacity fixed to include unitsize
- User constraint including flows fixed to include step_duration
- Creating multiple invests with 2D maps fixed
- Update_flextool.py/ migrate_database.py crashing if nothing to commit
- Nested structure:
- Pass end state only from dispatch level
- Storage fix_quantity overrides other storage options
New features
- Added non-anticipatory constraint to stochastic branches. The brnaches now start from the first timestep.
- Storage_reference_value: Now possible to set seperately for multiple end times as time step map.
- Nested structure storage_nested_fix_method:
- Added fix_usage
- Fix_price changed to set the price to the objective function of the lower level solve
New features
- Upgraded FlexTool to Spine Toolbox v0.8
- Entity alternative replaces is_active parameter
Bug fixes
- Stochastic and rolling weights
Bug fixes
- Inertia with MIP units added missing unitsize
- Result ordering improvements
- Fixing how flow variables are limited
- Min_load to work with multiple inputs/outputs¨
- Capacity limit includes the efficiency
New features
- Output of inertia seperately for units
- Default penalty values for reserve, inertia, capacity margin and non-synchronous limits
- Large model data processing speed-ups
Bug fixes
- Investments: maxState to only sum over the investments in this node, not all the nodes
- Ramp constraint now correctly calculates the investments done in previous periods
- Min and Max Invest/Divest constraints to only affect investment periods
- Efficiency works with profile units
- Allow upward and downward slacks to be more than the inflow
- Potential VRE generation now includes efficiency and availability
- Non-sync group constraint now excludes the flows inside the group
- Two-way MIP connection to allow only one direction at a time
- Connection variable cost to the objective function
- Allow investing with just
invest_periodswithoutrealized_periods - unit_inputNode:
coefficientapplied correctly to units with multiple inputs
New features
- Two-stage stochastic modelling of future uncertainty
- Better infeasibility and required parameter checks to inform the user what is wrong with the model
- Small changes to some result data parameters
- Added availability (constant /timeseries) parameter for entities
- Several outputs to be optional to hasten the data transfer.
- Added group flow output parameter
output_aggregate_outputsto give the flow of the desired nodes in a grouped format - Option for loss of load sharing
share_loss_of_loadbetween nodes in a group to better describe the system where loss of load is present - A workflow item to display the summary file from model runs
- Database with pre-made time settings for the users to start with time_settings_only.sqlite
- C02 max total costraint
- Default values for:
- Penalty values
- Efficiency
- Constraint constant
- Reserve reliability
Documentation
- Introduction
- Improved tutorial (including how-tos split of into their own section)
- Installation / update instructions
- Theory slides
- How to section to guide on making specific parts of the model
Building parts of the model:
- How to create basic temporal structures for your model
- How to create a PV, wind or run-of-river hydro power plant
- How to connect nodes in the same energy network
- How to set the demand in a node
- How to add a storage unit (battery)
- How to make investments (storage/unit)
- How to create combined heat and power (CHP)
- How to create a hydro reservoir
- How to create a hydro pump storage
- How to add a reserve
- How to add a minimum load, start-up and ramp
- How to add CO2 emissions, costs and limits
- How to create a non-synchronous limit
- How to see the VRE curtailment and VRE share results for a node
Setting different solves:
- How to run solves in a sequence (investment + dispatch)
- How to create a multi-year model
- How to use stochastics (represent uncertainty)
General:
- How to use CPLEX as the solver
- How to create aggregate outputs
- How to enable/disable outputs
- How to make the Flextool run faster
Bug fixes
- Storage state, unit flows and ramps were not properly limited in multi-period investment models.
- Removed limits from vq_state (they were causing infeasibilities in some case).
- Added time changing efficiency to profile based flows.
- Flows from node to unit in unit__node are marked negative (were positive).
New features
- Breaking change:
realized_periods(solve objects) is supplemented with arealized_invest_periodsso that the user can state from which solves the results should take investment results and from which solves dispatch results. - New parameters for solve objects:
solve_mode,rolling_duration,rolling_solve_horizon,rolling_solve_jumpandrolling_start_timethat enable to build rolling window models. See How to use a rolling window for a dispatch model. - New parameter
contains_solvesthat enables nesting solves inside solves (e.g. to calculate shadow values for long term storages or to implement rolling dispatch inside a multi-year investment model). See How to use Nested Rolling window solves (investments and long term storage). - New outputs: For groups:
VRE_share_t. For unit__nodes (VRE units):curtailment_share,curtailment_share_t. - Name changes to outputs:
flowtoflow_annualized,sum_flowtosum_flow_annualized. - Add migration for results database (parameter descriptions can be migrated).
- Documentation updates: new how-to sections.
- Faster outputting of ramp results.
- update_flextool.py will leave the Toolbox project untouched.
- Disable execute project button from the FlexTool workflow.
Bug fixes
- Cancelling of plot_results will not freeze Toolbox
New features
- Lifetime_method (reinvest_automatic and reinvest_choice) so that user can choose whether assets will be automically renewed at the end of lifetime or the model has to make that choice
- Commercial solver support (CPLEX)
- Database migration. init.sqlite and input_data.sqlite will be updated to the latest version when update_flextool.py is run. It is also possible to update any database using migrate_database.py. After
git pull, runpython -m update_flextool.py. In future, justpython -m update_flextool.pyis sufficient. Best to update Spine Toolbox before doing this.
Bug fixes
- Use of capacity margin caused an infeasibility
- Certain inflow time series settings crashed the model (complained about ptNode[n, 'inflow', t])
- Investments did not consider lifetime correctly - units stayed in the system even after lifetime ended
- Lifetime is now calculated using years_represented
- Fixed how retirements work over multiple solves
New features
- Added support for commercial solvers (CPLEX explicitly at this point)
Bug fixes
- Node prices were million times smaller than they should have been (bug introduced when scaling the model in 3.1.0)
- Non-synchronous limit was not working.
New features
- Documentation structure was improved
- Model assumes precedence between storage_start_end_method, storage_binding_method, and storage_solve_horizon_method (in that order)
Bug fixes
- The calculation of the p_entity_max_capacity did not consider which investment method was actually active. It also limited capacity in situations where investment method was supposed to be 'invest_no_limit'.
Bug fixes
- Division by zero capacity for units with cf
- Output fixed costs for existing units
- Fix output calculation for annualized fixed costs
- Fix error in importing CO2_methods for groups
- Add other_variable_cost for flows from unit to sink
New features
- New investment method with a limited horizon (model used to assume infinite horizon)
- Braking change: new parameter 'years_represented', which replaces 'discount_years'. It is a map to indicate how many years the period represents before the next period in the solve. Used for discounting. Can be below one (multiple periods in one year). Index: period, value: years.
- Added sidebar to documentation (gh-pages branch)
- Default solver changed from GLPSOL to HiGHS
- Documentation improvements
- Scaling of the model resulting in very big performance improvement for linear problems
- Improved plotting for the web browser version
- In Spine Toolbox, plotting is based on the specification from the browser version
- More results: group flows over time
- More results: costs for whole model run
- More result plots
Bug fixes
- CO2_method for groups was not imported correctly from Excel inputs
- Fix other_variable_cost in units for flows from unit to sink (source to unit was working)
New features
- Output fixed costs for existing units
- Added outputs to show average capacity factors for periods
All planned features implemented
TEMPLATE
Bug fixes
- foo
New features
- bar