I'm part of a listserve for power systems engineers (more from academia than from industry) and the consensus seems to be that a couple of trips in short succes

I'm part of a listserve for power systems engineers (more from academia than from industry) and the consensus seems to be that a couple of trips in short succession caused wild swings in powerflows, resulting in a cascading failure - this is a pretty boring, if consequential, N-2 event, very similar to the 2005 Northeast Blackout in the US.