| Keokuk Dam & 25Hz Power |
|---|
Whether I was told so, or figured out later, this must have been done
with rotating machinery. I would guess, unless there is a cute hack I
am unaware of, this would give a nasty waveform, but would probably be
smoothed out by the rest of the grid.
The dam is still generating electricity, but the old generators and
converters have probably long ago been replaced by native 60Hz
generators.