Power outages with excess power supply

simcity-2013

I currently have a nuclear power plant with a second plant add-on providing me 400mw of power to my city. The data meter on my power says I have excess power (of over 100mw) yet I keep getting notices that some areas of my city are not getting power.
I'm not selling my power to other cities, my powerplant is educated and not in danger of meltdown. Every building is connected to road and supplied properly. Why am I getting no power warnings from some buildings? Sims are moving out and my population is decreasing!

Side note: the power outages move around as well, one area will be affected, then get powered but will take away from another area. This tells me there isn't enough to power the whole city, yet my meter says I have excess. So what is going on?

Best Answer

The way that Simcity simulates power distribution is by creating agents (the little yellow dots) that travel along the power grid. These agents follow a random path under your roads and power each building along the way.

If you have a complicated road network and the unpowered buildings are at the ends of roads (so that there is only one way to reach them) then the agents' random paths are unlikely to pass by those buildings and the buildings will show as unpowered. To fix this, try building more road routes to the affected structures.