TELECOM Digest OnLine - Sorted: Keokuk Dam & 25Hz Power

Keokuk Dam & 25Hz Power

John McHarry (jmcharry@comcast.net)
Sat, 11 Mar 2006 23:01:52 GMT

When I was young I was told that the dam at Keokuk, IA generated 25Hz
power. Since construction was completed in 1913, this may well have
been true. I was also told that the power was by then converted to
60Hz and fed into the grid.

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converters have probably long ago been replaced by native 60Hz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.

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