#Fractal power grid idea. We're almost there.
https://www.youtube.com/watch?v=sS4rd1hpDnQ
National grid: #Nuclear, #Solar, #Hydro, Whatever all powers the national (and possibly international) power grid, distributed by major connections transferring power from where it's made to where it's needed.
City grid: Same thing, just on a smaller scale.
Community grid: Neighborhood battery systems regulate flow and prevent brownouts and blackouts during adverse conditions like heat waves, high winds, and cold snaps.