The power grid system works. If there is a fault and a transformer blows, the grid automatically reroutes the power around the fault. What happened in that blackout was not cause by the system being incapable of handling the power load. There was a fault in the grid near brookpark ohio. The switch that was suppose to shut off that that portion of the grid, was forced to remain open because it Edison power workers had jimmyed it so they wouldn't have to keep resetting it. Since it didn't isolate the problem, the fault was allowed to enter the rest of the grid and which shut down in a domino effect. You can argue that the switch that was jimmyed was old and had shut down a number of times when it shouldn't have, and that's the reason the workers bypassed it. But if it was working, it would have prevented the blackout.