Upgrading Power Grid Faces Hurdles, But New Solutions Could Boost Capacity

The US added just 251 miles of high-voltage transmission lines last year, continuing a trend of declines, though more power infrastructure is greatly needed.

Approval processes with various governments and agencies, as well as lawsuits, can slow down new power lines by up to a decade in the US.

"Advanced reconductoring" - replacing older lines with newer carbon fiber models that carry more current - is used in some countries to double grid capacity.

Studies suggest this technique could significantly boost US electric grid capacity in many areas, but more utilities need to adopt it.

Upgrading lines is not the only grid upgrade needed but could be a major part of the solution, according to a UC Berkeley scientist.