I'm crazy excited that this might actually have a chance to come to fruition. Back in my salary-man days, I worked for Hiroshi Fujiwara when he was doing work on Superconducting DC technology.
The idea was similar to this one -- set up solar and wind generators in the Gobi desert, and transmit the energy through a superconductor network to Japan, Russia and other countries. The Superconductor system (I believe) could transmit energy at nearly 99% efficiency,
We got to see the 200m superconductor track at Chubu University, which was amazingly cool.
[1]http://www.sciencedirect.com/science/article/pii/S1875389212...