With this release, the Flexible Distribution Grid Demonstrator (FLEDGE) was renamed to Multi-Energy System Modeling and Optimization (MESMO).

New features

• Added new optimization problem object (utils.OptimizationProblem) as main interface for defining optimization problems with functionality to 1) export the standard form for LP / QP, 2) directly interface Gurobi for better performance with large problems.
• Overhead line types can now be defined in terms of conductor data and geometric arrangement (Arif Ahmed).
• Added local-approximation variant for linear electric grid model.
• Added linear model set for electric grid model, which enables defining separate linear models for each time step.
• Added power flow solution set, to obtain power flow solutions more conveniently for multiple time steps.
• Added pre-solve method for DER model set, to obtain baseline nominal power time series for flexible DERs.

Changes

• Improved / simplified define_optimization...() methods for most use cases.
• Revised define_optimization...() methods for new optimization problem object.
• Switched from multiprocess to ray for parallel processing for performance reasons.
• Revised documentation structure, overhauled the architecture documentation and added the configuration reference.

Fixes

• Updated environment.yml.
• Updated version indicators.

New features

• Added problems module with definitions for nominal operation problem (simulation) and optimal operation problem (optimization).
• Added high-level API for executing optimal & nominal operation problems.
• Added various DER models.
• Enabled most DERs for thermal grids (Verena Kleinschmidt).
• Added ability to define electric grid model as single-phase-approximate.
• Added Z-Bus power flow solution method (Arif Ahmed).
• Added plots module (work-in-progress).
• Added ability to set local configuration with config.yml.
• Added ability to set base units for apparent power, voltage and thermal power for in scenario definition.

Changes

• Moved implementation of optimization problems from Pyomo to CVXPY for performance improvements.
• Reformulated optimization constraints to use normalized values for improved numerical performance.
• Improved FLEDGE definition data format documentation.
• Refactored DER model data definition format.
• Refactored price data object.
• Various fixes in linear electric grid model model and DLMP calculations.
• Introduced various error messages for common issues.

New features

• Moved to Python as main implementation language.
• Extended linear electric models with methods for defining optimization variables / constraints.
• Added thermal grid model.
• Added linear thermal grid model with methods for defining optimization variables / constraints.
• Added DER models and integrated CoBMo for flexible building models.
• Added methods for defining operation limits and obtaining DLMPs for electric and thermal grids.
• Provided various example scripts for running optimal operation problems for DERs / electric grids / thermal grids / multi-energy grids.

Auxiliary Release

• Snapshot before moving to Python as main implementation language.

Initial release