-------- Hal Murray writes: > I'd expect an ADEV type pattern. For long tau, the wander in the system will > dominate. We have lots of long term data so should be able to plot that part > of the graph.
I did that some years ago: The Nordic grid bottomed out around 1e-10, with a frequency error less than 2e-11 measured over 45 years. > How much energy is in the rotating turbine and generator? That should > provide > a lower limit on the time constant of the control loop. Answer A: Surprisningly much (do the math on 50 tons of iron, 1m diameter at 3000 or 3600 RPM) Answer B: Not enough to keep modern grids stable (Google term: "Low inertia conditions") -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | 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 -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
