In an earlier post The ‘Super Grid’ is Super Important for Renewables I looked at why a more robust grid is important if we are to dramatically expand the use of renewable energy. In short, it provides a way to aggregate, geographically dispersed, renewable energy sources so that they average out such that a percentage of the resource can be treated like base load. This is being talked about a good deal and there are some great articles and graphics showing how the Super Grid is shaping up.
This is a great interactive graphic from National Geographic which also includes a look at planned power sources including solar and wind.
Here is another interactive graphic that was developed for NPR again showing the planned grid upgrades. If you click on the tabs along the top it brings up variety of other layers showing things like where windpower resources are best, where proposed grid connections for the wind power are, where the solar resource is best, etc.
Discussion of 345kv vs 765kV Here
Primer on transmission line capacity Here
Wikipedia offers a good primer on electric power transmission here.
See part III of this post Here
See Part I of this post Here
supersmartgrid, supergrid, smartgrid, smart grid