Overview

Matrices and Right-Hand Sides (RHSs) were printed from NLP Solver Ipopt. They give the linear problem as detailed by equation (11) of (Watcher and Biegler 2005). A brief outline of how this was done can be found in the HOW_TO_GUIDE.md in the Ipopt directory.

The test systems are broken into two directories. The acopf directory contains AC optimal power flow problems (both stochastic and multiperiod) while the scopflow directory contains security constrained AC optimal power flow problems. Additional details can be found in the READMEs in those directories as well as the individual case directories.

Note: The repository is quite large and uses Git LFS. If you plan to clone the repository, you will need to install it.

Matching Right-Hand Side with a Matrix

Both right-hand sides and matrices are in Matrix Market format. The header section in both the right-hand side and matrix files contains a unique ID number. In order to match a specific right-hand side vector with its corresponding matrix, simply match the two IDs. For example, say the right-hand side file has the header

%%MatrixMarket matrix array real general
% ID: 70

Then the corresponding matrix should have the header

%%MatrixMarket matrix coordinate real symmetric
% ID: 70

so the ID field in both files match.

Authors

This repository was created by Shrirang Abhyankar of PNNL and Jonathan Maack of NREL.

Citation

If you use the matrices in the acopf directory, please include the following citation

Maack, Jonathan. 2023. Optimal Power Flow Derived Sparse Linear Solver Benchmarks.
Golden, CO: National Renewable Energy Laboratory. NREL/TP-2C00-86931.
https://www.nrel.gov/docs/fy24osti/86931.pdf.