Exactly. The modern AC power grid is very resilient due in part to the multi-interconnect nature which allows for parts of the grid to go down without taking d

Exactly. The modern AC power grid is very resilient due in part to the multi-interconnect nature which allows for parts of the grid to go down without taking down the whole network. On an AC grid, there are breakers that automatically disconnect and often reconnect. http://en.wikipedia.org/wiki/Recloser http://en.wikipedia.org/wiki/Recloser I guess that this HDVC hybrid breaker accomplishes more or less the same thing.