[time-nuts] A Research Proposal

[jimlux]

On 7/8/19 3:11 PM, Hal Murray wrote:
> 
> glenlist at pacificmedia.com.au said:
>> I think  people getting confused with the phase of measured current to  the
>> voltage .
> 
> No, we have been discussion the phase angle between 2 geographically separated
> locations connected by a power line.
> 
> Consider the simple case of a generator, 100 miles of line, and then a light
> bulb.  The voltage at the light bulb will be delayed by the speed of light.
> That delay can be expressed as a fraction of a cycle and converted to a phase
> angle.

> 
> It gets much more complicated if you have multiple generators, multiple loads,
> and various transmission lines, and even more complicated when you turn things
> on and off.


The transmission line is decidedly not Velocity Factor =1.0

A typical propagation constant might be j0.0018/mile

about 5500 km/wavelength at 60 Hz.

Free space propgation delay for 5500 m is 18.5 milliseconds - compared 
to 16.67 millisecond period of 60Hz.  A velocity factor of about 90%

(that's for an example I found for 765 kV, using Tern conductors, in 
bundles of 6

http://home.engineering.iastate.edu/~jdm/ee552/Transmission.pdf
)


> 
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