Wacky Weekend: NERC to relax power grid frequency strictures

Jay Ashworth jra at baylink.com
Sat Jun 25 22:18:47 CDT 2011


----- Original Message -----
> From: "Seth Mattinen" <sethm at 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 at 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




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