One idea to get more solar and wind power into the grid is frozen cables buried underground.
American Superconductor, which makes superconductor wires, has developed a system to use direct current superconductor cables, which greatly reduce loss of energy during transmission. It's a way to beef up the U.S. power grid and bypass many contentious problems over siting overhead lines, according to the company.
Typically, plans to modernize the grid and meet growing demand for electricity involve adding bulk transmission lines. Also, more lines are needed to transport large amounts of solar and wind power from the west … Read more