Water storage would be a safer and cheaper option. Basically build two reservoirs at different elevations. Stick a hydroelectric plant in the middle. During low demand an electric pump pumps the water back up to the high reservoir, and when demand spikes you open the spillway and turn on the hydroelectric plant. We've done this before.
Edit: oh and while I do know what you're talking about, I never actually experienced it. I joined the Navy to see the world and they said "you're going to South Carolina, and staying there!" I was born on a carrier, and toured a few while I was in, but I've never been on a boat.