[time-nuts] Power lines and time
phk at phk.freebsd.dk
Mon Aug 22 15:44:29 EDT 2005
In message <003c01c5a74d$b95c9520$0500a8c0 at darius.domain.actdsltmp>, "Bill Hawkins" writes
>">1. It is unlikely that any power network just lets itself go,
>>with no standard time/frequency to hold. The under-frequency
>>relays would make that hazardous.
>Does not follow."
>Well, it doesn't follow from the watt-hour meter, but look at
>the larger network picture.
I didn't say it was not true, I only said it didn't follow from
your argument about the power-meter :-)
The specs for the Nordpool area sets some specific frequency bands,
voltage bands and time constants for which regulation regime applies.
The result is that the frequency is generally a tad on the low side,
but well inside the tolerance, because nobody sees it as their job
(and expense) to keep the average at 50Hz.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at 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.
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