Dean, Thank you so much for your detailed and authoritative note about power utilities.
> I am not certain of the rules of operation, or of the way they tweak > things (generator bias?), but could find out from friends and > colleagues, if you wish. If it wouldn't be too much to ask, yes, I think several of us would be interested in how, and under what rules, they tweak the frequency. My look at 60 Hz here in the US suggests there are short-term (on the order of hours and days) changes for power flow as you desribed, but also long-term forces that tend to maintain semi-accurate time in spite of the short-term variations. Surprisingly, here in Washington at least, a mains clock is accurate to a few seconds a month, even if on a day to day basis it varies up to 10 seconds. http://www.leapsecond.com/pages/mains/ /tvb _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
