September 08, 2011
San Diego is fed by two high-tension power feeder lines, from the north and from the east. This afternoon both of them failed completely, blacking out most of San Diego.
San Diego Gas and Electric says they don't know what happened.
Now this probably is just a case of overload leading to breakers flopping. In that case the second one died as the second step in a simple cascading failure.
But it might be a case where the lines are physically cut somewhere. And if so, how did that happen? Was it done deliberately by someone?
Posted by: Steven Den Beste in Weird World at
06:38 PM
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Post contains 102 words, total size 1 kb.
Reminds me of the rules of high-availability computing - never trust one of anything, because anything can fail; never trust two of anything, because if one fails, the other is going to get hit with twice the normal load and promptly fail as well.
(Fortunately computers, unlike high-tension power feeds, rarely explode when things go wrong.)
Posted by: Pixy Misa at September 08, 2011 08:04 PM (PiXy!)
A lot of the reason California is vulnerable is that state policy of various kinds (ballot measures, laws passed by the legislature) have made it damned near impossible to build new generation plants of any kind. So California has to import a pretty big percentage of its electricity from elsewhere.
Up here in the PNW it isn't quite the same. We are a net exporter of electric power, overall. Sometimes (during the dark of winter) we import but most of the time we export. (That varies from year to year, mainly as a function of the precipitation total in the Columbia river basin, and in particular the snowpack in the Cascade Mountains.)
So if there were a huge cascading failure, it would cut the link between California and us, leaving us with excess generation capacity.
Posted by: Steven Den Beste at September 08, 2011 08:28 PM (+rSRq)
Posted by: Mauser at September 09, 2011 01:55 AM (cZPoz)
Posted by: metaphysician at September 09, 2011 05:43 AM (3GCAl)
Hmmmm. Wasn't that what Enron did? ;-)
(...albeit, via market manipulation and fraud) There's a lesson there about leaving your economy vulnerable to energy embargos and price manipulation.
Posted by: ubu at September 09, 2011 06:25 AM (i7ZAU)
Posted by: Pete Zaitcev at September 09, 2011 06:34 AM (9KseV)
Posted by: metaphysician at September 09, 2011 09:10 AM (3GCAl)
You might be thinking of Arizona, which does sell power to some parts of California.
Earlier this year, there was much amusement when certain municipalities in CA started considering refusing to do business with firms in Arizona over their state immigration law. They were overlooking the fact that they were buying much needed electricity from the same state and any embargo of contractual relations with Arizona would certainly turn off the power to those municipalities.
Posted by: cxt217 at September 09, 2011 12:58 PM (1Q0lw)
Enclose all spoilers in spoiler tags:
[spoiler]your spoiler here[/spoiler]
Spoilers which are not properly tagged will be ruthlessly deleted on sight.
Also, I hate unsolicited suggestions and advice. (Even when you think you're being funny.)
At Chizumatic, we take pride in being incomplete, incorrect, inconsistent, and unfair. We do all of them deliberately.
How to put links in your comment
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