[igraph] Read Power Flow data format (PSSE, PSLF, etc)

[wanderingaengus]

I'd like to throw some of my graph analysis algorithms at power grid data.  Has anyone been successful at importing power network flow data in the formats normally used by PSLF or PSSE? Or even the Common Data Format used by IEEE?   [FWIW - I am already familiar with powergrid.R] .

Thanks!