H.8 Version 4.1 – released Dec 14, 2011

The Matpower 4.1 User’s Manual is available online.⁸¹

New Features

• More new high performance OPF solvers:
  • Support for the KNITRO interior point optimizer for large scale nonlinear optimization. Use OPF_ALG = 600 for to select KNITRO to solve the AC OPF. Requires the Matlab Optimization Toolbox and a license for KNITRO, available from http://www.ziena.com/.⁸² See help mpoption for more KNITRO options.
  • Support for Gurobi to solve LP and QP problems. Set option OPF_ALG_DC = 700 to use Gurobi to solve the DC OPF. Requires Gurobi (https://www.gurobi.com/) and the Gurobi MEX interface (http://www.convexoptimization.com/wikimization/index.php/Gurobi_mex). See help mpoption for more Gurobi options.
  • Updated for compatibility with CPLEX 12.3.
  • Changed options so that fmincon uses its interior-point solver by default. Much faster on larger systems.
• Support for basic modeling of DC transmission lines.
• New case files with more recent versions of Polish system.
• Power flow can handle networks with islands.

Bugs Fixed

• Computation of quadratic user-defined costs had a potentially fatal error. Thanks to Stefanos Delikaraoglou for finding this.
• Calculation of reserve prices in toggle_reserves() had an error.

Incompatible Changes

• Optional packages TSPOPF and MINOPF must be updated to latest versions.