[142435] in North American Network Operators' Group
Re: Wacky Weekend: NERC to relax power grid frequency strictures
daemon@ATHENA.MIT.EDU (Jay Ashworth)
Sat Jun 25 23:18:57 2011
Date: Sat, 25 Jun 2011 23:18:47 -0400 (EDT)
From: Jay Ashworth <jra@baylink.com>
To: NANOG <nanog@nanog.org>
In-Reply-To: <4E0661E9.7040602@rollernet.us>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
----- Original Message -----
> From: "Seth Mattinen" <sethm@rollernet.us>
> On 6/25/2011 15:12, Leo Bicknell wrote:
> > I have never seen a generator that syncs to the utility for live, no
> > break transfer. I'm sure such a thing exists, but that sounds crazy
> > dangerous to me. Generators sync to each other, not the utility.
>
> Most of these come in open, delayed, or closed transition models:
> http://www.gedigitalenergy.com/powerquality/ATSHome.htm
>
> For open and closed transitions you'll most certainly want to sync to
> utility to transition between the two. For the delayed transition model
> it'll stop at the intermediate "open" point for a configurable amount of
> time during which the load is disconnected from everything (i.e. let all
> the motors spin down first).
And more to the point, if you're installing 2-5MW of generation capacity,
it's not all that uncommon to make it a cogen plant, at which point yeah,
you're gonna run in sync.
Leo: note that your body text was an *attachment* for some reason; new mailer?
Cheers,
-- jra
--
Jay R. Ashworth Baylink jra@baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
