CHANGELOG.md

GasModels.jl Change Log

Staged

• nothing

v0.10.0

• update to new JuMP nonlinear interface (breaking)
• drop support for JuMP v0.22 and v0.23 (breaking)

v0.9.3

• update Memento dependency version
• adds linear relaxation formulation for steady state OGF
• adds a new run_ogf_comp_power_proxy problem formulation
• the LRWPGasModel now is populated
• adds linear approximation formulation for steady state OGF
• adds a new run_ogf_comp_power_and_pipe_proxy problem formulation
• the LRWPGasModel now is populated

v0.9.2

• Move Cbc to HiGHS
• update JuMP version
• simplified storage model
• archive old storage model
• add elevation models to pipes

v0.9.1

• fixes bug for data with no receipts
• non-dimensionalization of compressor power objective
• bug fix in parse_files where prep_transient_data! was called twice, overwriting "original_pipe" and "original_junction"
• bug fix in GasLib component index assignment
• updates for new multi-infrastructure conventions
• add mgc.sources to the matgas format to keep track of data source metadata
• Added storage to steady-state model

v0.8.2

• changed default interpolation to linear
• bug fix in reservoir constraints

v0.8.1

• bug fix in interpolation

v0.8

• strengthen variable bounds for resistors and loss resistors
• compressors are made optional components
• fixed bug in calc_connected_components
• corrected models of resistor physics
• added support storage model for transient_ogf added
• transient_ogf constraints and variables changed for improved computation times
• renamed variable_valve_operation to be variable_on_off_operation to reflect the name change from control_valve to regulator (breaking)
• removed explicit direction function calls. These are now handled automatically based on data
• renamed pd_min, pd_max to be pd_sqr_min and pd_sqr_max (breaking)
• added support for loss resistors, which model constant pressure loss
• added support for native GasLib parsing functionality
• added pressure slack node constraints to base formulations
• added compressor energy constraints to base formulations
• renamed formulations: NLP -> WP (Weymouth Physics), MINLP -> DWP (Disjunctive Weymouth Physics), MISOCP -> CRDWP (Convex relaxation of the disjunctive weymouth physics), MIP -> LRDWP (Linear relaxation of disjunctive weymouth physics), LP -> LRWP (Linear relaxation of the weymouth physics) (breaking)

v0.7

• Update to InfrastructureModels solution building (breaking)
• Add support for Memento v0.13, v1.0
• Introduce transient optimal gas flow formulation (transient_ogf)
• Support for transient optimization problem restricted to component types: junction, pipe, compressor, receipt, delivery, and transfers; objective support: load shed, compressor power, and linear combination of both.
• Add multi-network and transient_ogf unit tests
• Fixed bug in area computation .
• Fixed bug in sound speed computation and other parameters
• Fixed bugs in matgas parser by merging parses-fixes branch by @pseudocubic
• Implemented constraints on compressor power
• Implemented a multi-network test

v0.6

• Introduced matgas format (breaking) (#147)
• Add data consistency checks to file parsing
• Added support for JuMP v0.21 and Infrastructure v0.4
• Removed requirement that all edges must have unique ids (breaking)
• Refactor to make code style / conventions consistent with Infrastructure Models ecosystem (#136) (breaking)
• Introduced optimal gas flow formulation (ogf)

v0.5

• Renamed various function names for consistency (breaking)
• Replaced yn and yp variables with a single variable y
• Broke out resistor constraints from pipe constraints (breaking)
• Added upper bounds on second order code relaxations

v0.4.2

• Implement nlp version(s) of the problems
• Renamed various function names for consistency (breaking)
• Updated the documentation

v0.4.1

• Remove bounds on binary variables for increased solver robustness
• Improved support for infeasible status codes
• Fixed AMPLNLWriter name in extra tests

v0.4.0

• Support for JuMP 0.19 and the MOI interface

v0.3.5

• move to new Registrator and drop Julia v0.7 and v0.6 support
• fixed bugs in multinetwork build_ref construction
• Redefined the data dictionary to split out connections by type and removed type field (breaking)
• Replaced Logging with Memento
• Removed directionality from being defined in the forms. Instead, it is defined at the problem level (breaking)
• Added utility reference sets to improve computational efficiency of model building
• Refectored qgmin/qgmax/qgfirm and qlmin/qlmax/qlfirm. Now just qgmin/qgmax/qg and ql with a dispatchable flag. The semantics is that a dispatchable consumer or producer should take a value between min and max. A non dispatchable consumer or producer should use ql and qg respectively (breaking)

v0.3.4

• fixed bugs in print_summary function
• added tests for summary function to improve coverage

v0.3.3

• Added support for matlab like data input format parsing
• Added a print_summary function

v0.3.2

• Add support for Julia v0.7 and v1.0
• Minor documentation updates

v0.3.1

• Fixed a bug in the resistance calculation (thanks @cvr)
• Added Julia version upper bound

v0.3.0

• Standardized on SI for real unit inputs (breaking)
• Standardized naming conventions on volumetric flow, mass flow, and mass flux, depending on context (breaking)
• All computations and results are performed in non-dimenionalized units (per unit)
• Update MINLP solvers used in testing

v0.2.0

• Dropped support for Julia v0.5 (breaking)
• Added support for multiple networks in the JuMP model (breaking)
• Introduced the constraint_template.jl framework for gas constraints
• Created undirected and directed gas formulations (breaking)
• Producers and Consumers defined as separate objects so that multiple can exist at each node (breaking)
• Added compressors and control valves on compress in one direction as defined from f_junction -> t_junction (breaking)
• Added geolocation parameters to junctions
• Added support for a status parameter on call components

v0.1.0

• Initial implementation