[time-nuts] A Research Proposal
Bill Byrom
time at radio.sent.com
Mon Jul 8 17:51:00 UTC 2019
Andy, it appears to me that the FNET/GridEye system already does what you propose:
http://fnetpublic.utk.edu
The Angle Contour Map displays the kind of results you desire. But it doesn't know the Western Interconnection at this time. I believe there is a typo at the top of the Angle Contour Map:
> The frequency gradient map visualizes the real-time angle "differences" with respect to a referential point in Eastern
> Interconnection.
Shouldn't that state: "The ANGLE CONTOUR MAP visualizes ..."?
According to the legend, the angle contour map displays a measure of the phase angle differences between the individual FDR hosts and a "referential point". I'm not sure if that is an actual specific FDR host or some averaged phase.
Of course, you need to think carefully in a relativistic manner when you are trying to look at local phase in locations so far apart. At 60 Hz (in the US) 1 degree of phase corresponds to 46.3 us. That's the free space propagation delay of light over 13.89 km (8.63 miles). Generators 777 miles apart have a 90 degree phase relationship with respect to free space propagation phase.
--
Bill Byrom N5BB
Irving, TX
On Mon, Jul 8, 2019, at 6:11 AM, Andy Backus wrote:
> To clarify:
>
> My research proposal is for data to be taken within the same interconnection.
>
> It does not care about frequency.
>
> It does not care about Time Error.
>
> It only seeks to characterize the phase differences between the power
> line signal presented in regions of the distribution system separated
> by significant geographical distances.
>
> 180-degree phase reversals and three-phase transformations along the
> chain of information are easily distinguishable.
>
> Thanks for your interest. I hope some will accept the technical
> challenge of gathering data -- which is fairly minimal.
>
> Andy Backus
> Bellingham, WA
> (Western Interconnection)
>
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