<div dir="ltr"><div class="gmail_default" style="font-family:times new roman,serif">One of my coworkers at INL did some research into using the precise frequency measures to locate the source of grid disturbances. Essentially, his research group built a relatively cheap device that you plug into the mains. iirc, the device had a GPS (or you just told it where it was physically, I don't recall). It measured the change in frequency and reported back to a central server. They could look at the changes in the frequency as grid events propagated through the system. (iirc, this work was done 2010 or so).</div><div class="gmail_default" style="font-family:times new roman,serif"><br></div><div class="gmail_default" style="font-family:times new roman,serif">I've personally wished the power companies would use a low speed signalling mechanism to put timestamps on the wire... mainly so I wouldn't have to set the clock on my microwave and oven (30 second resolution would suffice for this application).</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, Nov 29, 2024 at 11:10 AM Elton A Sanders <<a href="mailto:radiodog77@pobox.com">radiodog77@pobox.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Time stamp by power hum.<br>
<a href="https://www.youtube.com/watch?v=e0elNU0iOMY" rel="noreferrer" target="_blank">https://www.youtube.com/watch?v=e0elNU0iOMY</a> <br>
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