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Date: Sun, 30 Nov 2014 21:42:09 +0800
From: Erich Dollansky <erichsfreebsdlist@alogt.com>
To: Darren Pilgrim <list_freebsd@bluerosetech.com>
Subject: Re: OT: UPS for FreeBSD
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Hi,

On Sat, 29 Nov 2014 11:56:39 -0800
Darren Pilgrim <list_freebsd@bluerosetech.com> wrote:

> On 11/28/2014 8:12 PM, Erich Dollansky wrote:
> > Real high voltage transmission
> > lines using DC make sense.
> 
> Someone already tried that.  It doesn't work.  The conductors have to
> be impractically large to get a useful amount of current, and the
> distance loss is so high you can't build even a metro grid with it,
> let alone a regional grid or the long-distance transmission systems
> we use now.


it does not work?

http://en.wikipedia.org/wiki/High-voltage_direct_current

It is a pretty common thing meanwhile. It is used only inside the
networks and consumers never get a direct contact to the DC part of it.

Erich