[time-nuts] GPS locked 60Hz?

[Bob Camp]

Hi

The guys who put up the original papers were from Quebec Hydro. Their issue was trying to set things up independent of the grid and dispatch power to where ever it was needed. Once they demonstrated it was possible a lot of other people became interested. Oddly enough at dinner I brought up the possibility of using Loran-C to them. Their commit was "have you ever tried to get 100 KHz past the field of a hydro station --- no way!!!". Actually the last part of it was in French, but that's as close as I an get ….

Bob

On Jul 27, 2013, at 4:10 PM, Bob Stewart <bob at evoria.net> wrote:

> But wouldn't it be easier to set phase if they had a known, good frequency?  Oh.  Frequency isn't the issue, is it?  If you have to supply to the west coast for a few hours and then plug into the east coast to purchase power, you might have to do a large phase shift between the two.  And after some arbitrary timeframe doing still more bouncing around you could be off in frequency as measured locally in the long term.
> 
> This idea just hit me because the Tymeter uses a synchronous clock drive.  And giving it some thought, I guess it's not that big a deal if you start with a cheap UPS and a good clock.
> 
> Bob
> 
> 
> 
> 
> 
>> ________________________________
>> From: Bob Camp <lists at rtty.us>
>> To: Discussion of precise time and frequency measurement <time-nuts at febo.com> 
>> Sent: Saturday, July 27, 2013 2:42 PM
>> Subject: Re: [time-nuts] GPS locked 60Hz?
>> 
>> 
>> Hi
>> 
>> If you go back into the Frequency Control Symposium papers from the 1980's there are several of them from the power line people on using GPS to track 60 Hz. They have kept at it ever since. Their main interest is in tracking phase across a large network, rather than locking up generators (for accurate time). Knowing phase lets them better balance power flow(s) and thus save money.
>> 
>> Bob
>> 
>> On Jul 27, 2013, at 3:11 PM, Tim Shoppa <tshoppa at gmail.com> wrote:
>> 
>>> http://leapsecond.com/pages/atomic-nixie/ shows a KVARZ CH1-75 Active
>>> Hydrogen Maser (5 MHz) through a HP 3325B synthesizer (60 Hz) through a HP
>>> 6827A bipolar power supply (100 VAC) to generate a 60 Hz mains.
>>> 
>>> At http://leapsecond.com/pages/mains/ he also shows the 60Hz grid
>>> meandering forward and back plus or minus 5 or 10 seconds over a month in
>>> 2004.
>>> 
>>> 
>>> On Sat, Jul 27, 2013 at 1:54 PM, Bob Stewart <bob at evoria.net> wrote:
>>> 
>>>> My Tymeter just clacked over to 50 minutes after, and I had a sudden
>>>> vision of GPS locking its input to 60 Hz, like in the good old days when
>>>> the power companies cared about frequency.  =)  Has anyone actually gone
>>>> that far in their time-madness?
>>>> 
>>>> Bob - AE6RV
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