G.2 CLP – COIN-OR Linear Programming

The CLP [37] (COIN-OR Linear Programming) solver is an open-source linear programming solver written in C++ by John Forrest. It can solve both linear programming (LP) and quadratic programming (QP) problems. It is primarily meant to be used as a callable library, but a basic, stand-alone executable version exists as well. It is available from the COIN-OR initiative at https://github.com/coin-or/Clp.

To use CLP with Matpower, a MEX interface is required⁶⁷ . For Microsoft Windows users, a pre-compiled MEX version of CLP (and numerous other solvers, such as GLPK and Ipopt) are easily installable as part of the OPTI Toolbox⁶⁸  [49]

With the Matlab interface to CLP installed, it can be used to solve DC OPF problems by setting the opf.dc.solver option equal to 'CLP'. The solution algorithms and other CLP parameters can be set directly via Matpower’s clp.opts option. A “CLP user options” function can also be specified via clp.opt_fname to override the defaults for any of the many CLP parameters. See help clp for details. See Table C-8 for a summary of the CLP-related Matpower options.

CLP can also be used to solve general LP and QP problems via Matpower’s common QP solver interface qps_matpower with the algorithm option set to 'CLP', or by calling qps_clp directly.