Well, I did.
The line that makes the most sense in the article:
"By now, many BS detectors will be ringing at full volume. I get it. This sounds like magic beans."
I see lot's of random claims (saving lives, detecting hacked systems and whatever).
What they do it high speed sampling of the current and voltage and compute 26 parameters
(why 26, something I must have missed when I got a degree in electrical engineering).
OK, you can characterize whats happening and try to correct some stuff.
40 years ago we kept the grid clean by simply putting a synchonous motor and generator on a single shaft
en could play around with thyristors, igbts and what not without generating a mess on the grid. The utility company
was not so happy with the students experiments and this was required to prevent us from messing up the grid.