POWER: San Mateo/San Francisco power outage report

Jay R. Ashworth jra at scfn.thpl.lib.fl.us
Wed Dec 9 23:56:07 UTC 1998

On Wed, Dec 09, 1998 at 09:04:27AM -0500, Jon Zeeff wrote:
> > grid primary power sources.  Aside from the human error, the system worked
> > "as designed to protect the rest of the grid."
> I suggest that causing a cascade effect and increasing the area of an
> outage isn't a good way to design a system.

I suggest that you don't understand power distribution and transmission
very well.  Just like any other generator, if you load a power station
too heavily, the voltage and the frequency will both be pulled down.

Since the tolerances on public electricity are something like +-5v and
+- .5 Hz., they really have no choice but to break ties when a plant or
segment goes out.  They really shouldn't cross-tie power on a running
basis as much as they probably do... but since the Green folks won't
always let them build plants...

-- jr 'Damn I'm glad I don't run a power company...' a
Jay R. Ashworth                                                jra at baylink.com
Member of the Technical Staff     Buy copies of The New Hackers Dictionary.
The Suncoast Freenet            Give them to all your friends.
Tampa Bay, Florida     http://www.ccil.org/jargon/             +1 813 790 7592

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