I don't know of too many electrical distribution networks that use DC
interconnection to limit AC failures from propogating.
The main cause of AC disruption is a power plant getting out of phase
with the rest of the power plants on the grid. When that happens, the
plant "trips" of goes off-line to protect the entire grid. You lose
some generating capacity but you dont fry everything on the network
either.
http://www.nerc.com/
There are some states that operate their own grids. Texas, for example.
-Richard
Sean Donelan wrote:
Sigh, there are differences between tightly coupled networks, such as
the electric power grid and loosely couple networks like the Internet.
But there are also some similarities, such as electric grids use DC
interconnections to limit how far AC disturbances propagate; the
Internet uses AS interconnections to limit IGP disturbances from
propagating.
http://sci.newsfactor.com/perl/story/20686.html
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