nanog mailing list archives
Re: Wacky Weekend: NERC to relax power grid frequency strictures
From: Jay Ashworth <jra () baylink com>
Date: Sat, 25 Jun 2011 23:18:47 -0400 (EDT)
----- 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
Current thread:
- Re: Wacky Weekend: NERC to relax power grid frequency strictures, (continued)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Ingo Flaschberger (Jun 26)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures [OT] Jussi Peltola (Jun 26)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures [OT] Pete Carah (Jun 26)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Owen DeLong (Jun 27)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Michael DeMan (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Seth Mattinen (Jun 25)
- RE: Wacky Weekend: NERC to relax power grid frequency strictures Matthew Huff (Jun 26)
- RE: Wacky Weekend: NERC to relax power grid frequency strictures Ingo Flaschberger (Jun 26)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Pete Carah (Jun 26)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jussi Peltola (Jun 26)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jay Ashworth (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Leo Bicknell (Jun 26)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jussi Peltola (Jun 26)
- RE: Wacky Weekend: NERC to relax power grid frequency strictures Alex Rubenstein (Jun 26)
- RE: Wacky Weekend: NERC to relax power grid frequency strictures Alex Rubenstein (Jun 26)
- RE: Wacky Weekend: NERC to relax power grid frequency strictures Alex Rubenstein (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jeff Wheeler (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jay Ashworth (Jun 26)
- RE: Wacky Weekend: NERC to relax power grid frequency strictures Alex Rubenstein (Jun 29)