On 7/7/19 11:48 AM, Bill Hawkins wrote:
Group,
We've discussed this before, but maybe it needs to be said again.
Line frequency is not constant.
I think the research is more about understanding the frequency and time
shifts across the network, referred to a more accurate and stable
reference. Not so much trying to use the grid as a time/frequency
reference.
For instance, is the variation in phase across the San Fernando Valley
different in the afternoon when everyone turns on their air conditioner
- sure there's a "voltage at the user" change, but is there also a phase
change.
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