amplpower 0.0.45

AMPL package for power systems

AMPL package for power systems

• Free software: MIT license

Installation

pip install amplpower

You can also install the in-development version with:

pip install https://github.com/salvapineda/amplpower/archive/main.zip

Documentation

https://amplpower.readthedocs.io/

Development

To run all the tests run:

tox

Note, to combine the coverage data from all the tox environments run:

Windows	set PYTEST_ADDOPTS=--cov-append tox
Other	PYTEST_ADDOPTS=--cov-append tox

Changelog

0.0.45 (2026-05-07)

• Allow for any slack bus and fix bug with signs

0.0.44 (2026-04-21)

• Improved voltage angle reconstruction in AC OPF (acjabr):

  • Switched from using only np.arccos(cosft) to np.arctan2(sinft, cosft) for voltage angle calculation.

  • Now handles all angle quadrants and preserves correct sign and range.

  • More accurate voltage angle assignment in OPF results.

0.0.43 (2026-01-29)

• Incorporate cartesian variables to Jabr mode

0.0.42 (2025-09-19)

• Get Vr and Vi in buses results

0.0.41 (2025-07-10)

• Slack bus in bustype 3

0.0.40 (2025-07-10)

• Fix bug in initialization and is_feasible with shunt elements

0.0.39 (2025-07-08)

• Add is_feasible method to check feasibility of a given solution

0.0.38 (2025-06-06)

• Fix compute ptdf and lodf methods

0.0.37 (2025-06-06)

• Add compute ptdf and lodf methods

0.0.36 (2025-06-05)

• Modify BigM default calculation for DC OTS

0.0.34 (2025-06-03)

• Add times to results

0.0.33 (2025-06-03)

• Modification of set_switching function

0.0.32 (2025-06-03)

• Modify presolve_eps option to 1e-10

0.0.31 (2025-06-03)

• Remove minus infinity from variables in AMPL model

0.0.30 (2025-06-03)

• Floor and ceil function for initial BigM values in OTS

0.0.29 (2025-06-02)

• Bug with bound for power flows in OTS problem

0.0.28 (2025-05-22)

• Upper and lower bound for power flows

0.0.27 (2025-05-20)

• Remove cost definition from the model due to bad scaling in constraints

0.0.26 (2025-05-19)

• Bug with try except in results

0.0.25 (2025-05-07)

• Split solve_opf function

• Add upper bound to total generation cost

• Split creat model and solve model for clarity

• Change result output

• The AMPL model is now stored in self.ampl and can be modified by user

• Add best bound to results if available

0.0.24 (2025-05-05)

• No default options for solver

0.0.23 (2025-04-24)

• Fix initialize generation leven when multiple units at the same bus

0.0.22 (2025-04-24)

• Fix division by zero in generator violation calculation

• Chage options input to the solver

0.0.20 (2025-04-11)

• Add maximum violation of AC constraints to results.

0.0.19 (2025-04-09)

• Bug bus mapping

0.0.18 (2025-04-08)

• BigM for AC OTS are computed exploring all critical points

• Compute bounds for real and imaginary parts of voltage

0.0.17 (2025-04-04)

• Bug relatex to BR_X negative in some networks.

0.0.16 (2025-04-04)

• Modification of default Bigm values for AC OTS.

0.0.15 (2025-04-04)

• Bus mapping for some pglib networks

• Compute Bigm for AC OTS only if needed

0.0.14 (2025-04-04)

• Bug in solver status

0.0.13 (2025-04-04)

• Bug options solver

0.0.12 (2025-04-04)

• Modify option solver input

0.0.11 (2025-04-01)

• Return results for any status

0.0.10 (2025-04-01)

• Add formulations of OPF to docs

0.0.9 (2025-03-26)

• Tightest computation of bigMs for AC OTS.

• Tightest bounds for variables cosft and sinft.

• Add violations of AC constraints to results.

• Test use open-source solvers.

0.0.8 (2025-03-25)

• Corrected voltage results for AC jabr relaxation (acjabr).

0.0.7 (2025-03-25)

• Included default COST2 for generators (gencos) if not provided.

• Corrected voltage results for AC rectangular (acrect).

0.0.6 (2025-03-21)

• Added support for solving optimal power flow (OPF) problems: DC OPF, AC OPF (both rectangular and polar coordinates) and AC relaxation proposed by Jabr.

• Added functionality for solving the optimal transmission switching (OTS) problem: Big-M and non-linear formulations. Option to include or exclude connectivity constraints for the OTS problem

0.0.0 (2025-03-14)

• First release on PyPI.