September 08, 2011

Story to keep an eye on

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 | Comments (8) | Add Comment
Post contains 102 words, total size 1 kb.

1 At least we've improved to the point that it didn't cascade and take out the whole west coast.

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!)

2

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)

3 But hey, as more Californians move up here, and as the Washington and Oregon legislatures do their best to make them feel at home by passing California-like laws, I'm sure that eventually the eco-freaks will make them blow up the dams in the Columbia river so the Salmon can spawn and we'll have to import electricity from who knows where too.

Posted by: Mauser at September 09, 2011 01:55 AM (cZPoz)

4 States like New Mexico should clearly start upping their fees for electricity sold to California. . .

Posted by: metaphysician at September 09, 2011 05:43 AM (3GCAl)

5

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)

6 New Mexico is an electricity consumer (from western Texas). This is why we had rolling blackouts last winter. NM exports oil, but not electricity.

Posted by: Pete Zaitcev at September 09, 2011 06:34 AM (9KseV)

7 My mistake.  Substitute for "New Mexico" "whoever is actually selling electricity to California."

Posted by: metaphysician at September 09, 2011 09:10 AM (3GCAl)

8

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)

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