Ray Zimmerman

@mcsosa121 Are you working on this?

Is it possible that some branches have very small (or zero) reactance? That would cause singular matrix issues.

> Thanks for your reply. There were some zero reactance branches there. **However, after I set smallest positive reactance value to be 1e-3 and increase all branches' rateA capacities to...

_(For future reference, it's best to start a new issue or mailing list post for a new question)._ Regarding MATPOWER's handling of PSS/E RAW files, version 33 was the latest...

> I found this part in psse_convert_xfmr.m file ... Please create a new issue for this question, and close this one unless the singular matrix issue has not yet been...

The PSS/E import code was originally written by Yujia Zhu, so I'm not sure of all of the details, but I believe the handling of 3-winding transformers was based on...

Thanks @SanPen for sharing this, and yes, it is entirely appropriate here. I'm always open to improvements to MATPOWER performance, especially those that are simple and have broad impact, such...

Thanks. That would be wonderful.

Very interesting. I modified your comparison code to run through a number of large cases I have and the speedup ranges from about 1.3x to 2.5x with an average of...

> This is an interesting discussion! @rdzman, by the way, MATLAB does have a JIT compiler introduced several years ago. It is transparent to the user. See https://www.mathworks.com/products/matlab/matlab-execution-engine.html Exactly. My...