Hi Since the harmonics are locally generated, each site will see different crossings. The same is true of the local load impedance.
Bob On Sep 11, 2010, at 5:54 PM, "Stan, W1LE" <[email protected]> wrote: > If the odd harmonics were filtered out, would the zero crossing of the 60 > (50) Hz fundamental > be stable enough ? > > Thanks Stan, W1LE Cape Cod FN41sr > > > > > On 9/11/2010 5:08 PM, Bob Camp wrote: >> Hi >> >> You also have load dependent harmonic energy on there that messes up the >> zero crossings at the micro second level. >> >> Bob >> >> >> >> On Sep 11, 2010, at 3:45 PM, "Poul-Henning Kamp"<[email protected]> wrote: >> >>> In message<[email protected]>, "Thomas A. Frank" >>> wr >>> ites: >>> >>>> If so, being within 300 miles of each other suggests that they are >>>> most likely all on the SAME section of the grid, in which case the >>>> phase time of arrival of the electric power waveform should be >>>> constant between them (the zero crossing may not be perfectly >>>> aligned, but it should always be the same differential). >>> Won't work. Utility transformers have load-dependent parasitics >>> which mess this up. It is one of the biggest challenges in >>> doing "autonomous cell based grid control" and similar schemes. >>> >>> -- >>> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >>> [email protected] | TCP/IP since RFC 956 >>> FreeBSD committer | BSD since 4.3-tahoe >>> Never attribute to malice what can adequately be explained by incompetence. >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
