nanog mailing list archives
Re: Wacky Weekend: NERC to relax power grid frequency strictures
From: Jason Roysdon <nanog.20110127 () jason roysdon net>
Date: Sat, 25 Jun 2011 11:03:08 -0700
On 06/25/2011 07:49 AM, Jay Ashworth wrote:
----- Original Message -----From: "Jussi Peltola" <pelzi () pelzi net>On Fri, Jun 24, 2011 at 06:29:14PM -0400, Jay Ashworth wrote:This is gonna be fun, no?If your definition of fun is spending a year watching an old microwave clock lose or gain a few minutes. I don't see how this has anything to do with syncing two generators. The grid is in sync, and if the frequency of the grid changes (as it does all the time) it will stay in sync. It has nothing to do with the absolute frequency.Perhaps I read the piece incorrectly, but it certainly sounded to *me* like the part that was hard was not hitting 60.00, but *staying in sync with others*... Cheers, -- jra
Generators all stay in sync. Generator owners have expensive devices that sync the phase before the generator is connected to the grid. Once a generator is connected to the gird, it will stay in sync - in fact that is why they have the expensive devices to make sure that they are in sync before they connect them, as if they are not, it will instantly jump to being in sync, which may destroy the generator. I'm not an electrical engineer, but I do IT "Cybersecurity" for a local utility. The electrical engineering / power utility side of the house starts to rub off - but I say this as I might not have all the terms exactly right. I follow the FERC/NERC discussions as CIP compliance is one of my primary job duties. In fact, if you want to see what happens if you connect a generator out of phase, just look into the AURORA out-of-phase circuit breaker re-closing issues which were brought to light last year. Here's some links: http://www.atcllc.com/oasis/Customer_Notices/ATCNetworkCustomerMeeting052411_Francis.pdf Here's another link I read in the last week when trying to get up to speak more: http://yarchive.net/car/rv/generator_synchronization.html Jason Roysdon
Current thread:
- Wacky Weekend: NERC to relax power grid frequency strictures Jay Ashworth (Jun 24)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jussi Peltola (Jun 24)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jay Ashworth (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures William Herrin (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jason Roysdon (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jay Ashworth (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jason Roysdon (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Pete Carah (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jay Ashworth (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jussi Peltola (Jun 24)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Jason Roysdon (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Owen DeLong (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Ingo Flaschberger (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 Paul Graydon (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Andrew D Kirch (Jun 25)
- Re: Wacky Weekend: NERC to relax power grid frequency strictures Joel Jaeggli (Jun 25)
- 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)