nanog mailing list archives
RE: Wacky Weekend: NERC to relax power grid frequency strictures
From: Alex Rubenstein <alex () corp nac net>
Date: Sun, 26 Jun 2011 10:27:24 -0400
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 when 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 battery hits, motor restarts, etc, by 50%. I, again, don't like this, because the cons, imho, outweigh the benefits.
Current thread:
- Re: Wacky Weekend: NERC to relax power grid frequency strictures, (continued)
- 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)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Mark Radabaugh (Jun 27)