Today, the power grid is really a complex web of interconnected local and regional grids with largely centralized generation. Each individual grid is akin to a wheel, at least conceptually: power generation occurs at the axis, transmission and distribution networks reach outward like spokes and, along the perimeter, end users consume power.Today, the power grid is really a complex web of interconnected local and regional grids with largely centralized generation. Each individual grid is akin to a wheel, at least conceptually: power generation occurs at the axis, transmission and distribution networks reach outward like spokes and, along the perimeter, end users consume power.