Failure to sync = dirty power and a horribly corrupted sine wave. A bit more than watching an old microwave. On Sat, Jun 25, 2011 at 7:00 AM, <nanog-request@nanog.org> wrote:

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Today's Topics:

1. Wacky Weekend: NERC to relax power grid frequency strictures (Jay Ashworth) 2. Re: Wacky Weekend: NERC to relax power grid frequency strictures (Jussi Peltola)

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Message: 1 Date: Fri, 24 Jun 2011 18:29:14 -0400 (EDT) From: Jay Ashworth <jra@baylink.com> Subject: Wacky Weekend: NERC to relax power grid frequency strictures To: NANOG <nanog@nanog.org> Message-ID: <23981692.56.1308954554440.JavaMail.root@benjamin.baylink.com> Content-Type: text/plain; charset=utf-8

The North American Electric Reliability Council is planning to relax the standards for how closely power utilities must hold to 60.00Hz.

Here's my absolute favorite quote of all time:

Tweaking the power grid's frequency is expensive and takes a lot of effort, said Joe McClelland, head of electric reliability for the Federal Energy Regulatory Commission.

"Is anyone using the grid to keep track of time?" McClelland said. "Let's see if anyone complains if we eliminate it."

http://hosted.ap.org/dynamic/stories/U/US_SCI_POWER_CLOCKS?SITE=AP&SECTION=HOME&TEMPLATE=DEFAULT

I believe the answer to that question is contained here:

http://yarchive.net/car/rv/generator_synchronization.html [1]

This is gonna be fun, no?

Cheers, -- jra [1]Please, let's not start in on the source.[2] [2]No, really: *please*. :-) -- 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

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Message: 2 Date: Sat, 25 Jun 2011 07:32:41 +0300 From: Jussi Peltola <pelzi@pelzi.net> Subject: Re: Wacky Weekend: NERC to relax power grid frequency strictures To: nanog@nanog.org Message-ID: <20110625043241.GF25848@pokute.pelzi.net> Content-Type: text/plain; charset=us-ascii

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.

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