[142446] in North American Network Operators' Group
RE: Wacky Weekend: NERC to relax power grid frequency strictures
daemon@ATHENA.MIT.EDU (Alex Rubenstein)
Sun Jun 26 10:28:25 2011
From: Alex Rubenstein <alex@corp.nac.net>
To: Jussi Peltola <pelzi@pelzi.net>, NANOG list <nanog@nanog.org>
Date: Sun, 26 Jun 2011 10:27:24 -0400
In-Reply-To: <20110626140835.GG25848@pokute.pelzi.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> It makes little sense to sync to the grid when the generator is only
> used when the grid is down - and unless you run your generators 24/7
> your UPS will have to make up for the comparatively long time it takes
> for the generator to start, so it's rather useless to sync the
> generator when the power comes back so you can avoid a sub-second break w=
hen
> transferring back to utility power.
No, that is precisely the reason to do closed transition. The benefit is no=
interruption to load on retransfer. Effectively, you cut down on UPS batte=
ry hits, motor restarts, etc, by 50%.
I, again, don't like this, because the cons, imho, outweigh the benefits.
