Andy Bartlett wrote:
"John Williamson" wrote in message
Another way to save money on the grid would be to increase the frequency,
allowing the use of smaller transformers for the same power. The same
objections apply, although aerospace applications often use 400Hz AC for
this reason.

Trouble is even though substation efficiency would increase, your main
transmission line losses will increase dramatically due to skin effect. It
is still significant even at 50Hz.

Conflicting requirements. DC is best for long distance transmission, and
HF AC for smaller transformers...... It's Edison vs. Westinghouse all
over again. Grin

Could this be the reason why we use 50 - 60 Hz worldwide, as the best
compromise for a national grid?

--
Tciao for Now!

John.