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DHS To Review Report On US Power Grid Vulnerability
CWmike writes "The US Department of Homeland Security is looking at a report by a research scientist in China that shows how a well-placed attack against a small power subnetwork could trigger a cascading failure of the entire West Coast power grid. Jian-Wei Wang, a network analyst at China's Dalian University of Technology, used publicly available information to model how the West Coast grid and its component subnetworks are connected. Wang and another colleague then investigated how a major outage in one subnetwork would affect adjacent subnetworks. New Scientist magazine reported on this a week or so ago, and the paper has been available since the spring."
you don't stop flying just because airplanes can crash.
No, you stop flying because you don't like having to bend over to get through the TSA security theater. Sorry, random offtopic rant because I just got back from a flight....
I want peace on earth and goodwill toward man.
We are the United States Government! We don't do that sort of thing.
The electric grid has already suffered multiple cascading failures from simple events that led to widespread outage. Look into the West Coast outages of 1996 and 1998 as well as the failure in the Northeast in 2003. There's a lot of interesting science going on around networks, graph theory, complexity and all. There's a really good book on teh subject, "Six Degrees" by Watts.
There were economic issues with Edison's ideas. The biggest problem was his insistence with DC. DC only worked with local power stations. AC scaled and could transmit over much farther distances with much less loss. More fault tolerant, perhaps. More scalable? Not from an economic standpoint.
If you connect your PLC to the Internet, it can email you when a problem arises. If you haven't coded responses to incoming email, it simply won't respond. I didn't see any incoming email commands on the PLCs I've worked on, but that doesn't mean they don't exist.
So, you get error reporting and real-time data from your PLCs when you connect them to the Internet. Apparently that's stupid.
The programming ports on the ones I've used are physically separate from the ones used for communication, and the functions simply cannot be swapped.
There is also -- again, in the cases of all PLCs that I have used, which is not exhaustive of all that are on the market -- a physical toggle switch that switches the PLC from "run" to "program" mode.
I suppose that if the PLC was attached to the Internet, and then you had a guy flip the switch and swap the cables, and then put the cables back and flip the switch back later, then yes, you could reprogram a PLC online.
If you can figure out an easier way, Omron, Koyo, AB, and IEEE would like to have a word with you.
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ECHELON is a government program to find words like bomb, jihad, plutonium, assassinate, and anarchy.
There were economic issues with Edison's ideas. The biggest problem was his insistence with DC. DC only worked with local power stations. AC scaled and could transmit over much farther distances with much less loss. More fault tolerant, perhaps. More scalable? Not from an economic standpoint.
The main reason AC scaled better than DC was that simple transformers could be used to boost the voltage or long-distance transmission on affordable diameter wire and back down to what could be safely handled in a home. Shifting DC, at the time, required rotary converters and was limited in voltage by the arcing and size of the commutators.
Since about the 1960s or so DC conversion for long-lines has been practical. And with modern semiconductors it's now economically competitive. With that, DC lines become practical for a makeover.
AC, unfortunately, introduces propagation timing effects that make things a bit more complex to keep running. DC doesn't have those failure modes AND it makes somewhat better use of a given amount of metal in the wire.
(A downside of DC vs AC is that a DC arc is harder to extinguish.)
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
it could be as easy as determining regional weak points, and a terrorist cell can launch BLU-114/B carbon filament warheads in enough areas simultaneously to cause a cascade blackout. the technology has already been in news in Taiwan.
(man i can't wait to get that phone call from Homeland Security tonight.)