Friends, The grid contains a massive amount of inertia in the rotating synchronous machinery that generates power. The 'springiness' of the transmission lines allows local noise and even phase noise that is caused by loads added to or dropped from the line. Hal Murray (ICBW) had pictures of individual cycles that were badly distorted by changing taps on distribution transformers.
So it is not correct to measure one point to a gnat's nose hair and call it "the grid frequency." It might be more accurate to put a flywheel on a synchronous motor and measure its speed, because the time constant of that system is a whole lot closer to that of the real grid frequency. Now, I understand that nobody build things like that any more, so perhaps a mathematical model of such a system could be solved by a computer that samples the line voltage at about 100 times line frequency. But perhaps I have misunderstood what you have been talking about. Bill Hawkins _______________________________________________ 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.
