John McHarry wrote:
>> 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.
> Not necessarily ... the resulting waveform would be quite fine
> ... imagine a 25 Hz motor on one side turning a shaft connected to a
> 60 Hz alternator.
That wouldn't be very efficient, and I think would cost more than simply replacing the 25Hz generators with 60Hz models.
There was another post that pointed to a couple of large users consuming 25Hz power near the dam. It could be they consumed the 25Hz output and the rest of the then CIPS customers were supplied native
60Hz power. This strikes me as more plausible than what I was told as a youth.