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What's New in MATPOWER 8.1

Released Jul 12, 2025

Below are some of the highlights of the changes since version 8.0 of MATPOWER. See the full release notes and the CHANGES.md file for more details. For release notes for previous versions, see Appendix H of the MATPOWER User's Manual.

New Features:

  • Three-Phase Proof-of-Concept Enhancements
    • New utility converts a standard single-phase MATPOWER case to an equivalent balanced three-phase case.
    • New prototype three-phase shunt model and off-nominal taps in transformer model.
    • Support for three-phase prototype data in savecase().
  • MP-Opt-Model 5.0 includes new, redesigned classes for building and solving mathematical programming/optimization models, support for quadratic constraints and quadratically constrained quadratic programming (QCQP) models and solvers, support for the open-source HiGHS solver for LP, QP and MILP problems, and new relax_integer option for solving the LP/QP relaxation of MILP/MIQP model.
  • MOST Pro 1.4.1, available by contacting info@matpower.org, adds support for MATPOWER DC lines as described in Section 7.6.3 of the MATPOWER User's Manual. Please note: MATPOWER 8.1 includes MOST 1.3.1, and MOST Pro 1.4.1 is a paid upgrade.
  • New functions:
    • mp.case_utils.convert_1p_to_3p() -- Converts a single-phase case to a three-phase case.
  • New options:
    • highs.opts overrides default options for the HiGHS solver.

New Case Files:

  • Two new cases.
    • case1197 -- 1197-bus radial distribution system case.
    • case59 -- 59 bus, 14 generator Australian network case.

New Documentation:

Three live scripts illustrate the use of new features.

  • Open in MATLAB Online examples/convert_1p_to_3p_ex1.mlx - single-phase to three-phase conversion capabilities
  • Open in MATLAB Online mp-opt-model/examples/milp_example1.mlx - using new mp.opt_model class to build and solve an optimization model
  • Open in MATLAB Online mp-opt-model/examples/qcqp_example1.mlx - new quadratic constraint features and QCQP features

Other Improvements:

  • Update versions of included packages:
    • MP-Test 8.1
    • MIPS 1.5.2
    • MP-Opt-Model 5.0
    • MOST 1.3.1
  • Numerous bug fixes.

Thanks to Wilson González Vanegas for numerous contributions to this release.