I think i figured out my city problem.
My city has two ground levels, and my power plant is on the upper level. The lower level, while close, doesn't have a direct connection to the upper level. So the energy has to go all around the map on this particular terrain.
When there's a drop of wind, the power drops, and it takes way too long to get back to the lower part of the city (since there's only the long way around)
There's no way to make a shorter route for the energy: It's too steep of a drop for me to create a road in it.
I wonder how I will fix this.
Giant batteries.