11575Re: [Hammock Camping] Re: Electric Blankets and Clothing
- Dec 1, 2005Ralph Oborn said:
> AC is easier to transmit over distance. See the historical argumentI'm sure you mean "was". HVDC is currently the preferred option for
distance transmission, it's only at the local distribution level that
AC is easier because transformers are so simple to mass produce.
Countries like Brazil where there's a lot of hydro in the mountains
but the people live some distance away have huge HVDC systems because
they're more efficient.
I wouldn't be holding up the US as an example of anything, frankly.
I've studied their power system because it's one of the most complex
and least efficient in engineering terms of any system in the world.
They use HVDC links to partially isolate parts of the grid in an
effort to prevent failure cascades.
It also depends on what your priorities are - the US is anti-
darwinist so a more survivable mains voltage is useful, but for the
rest of the world higher efficiency wins out.
Either way, I'd much rather have a low DC voltage in my electric
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