Transmission expansion could spur billions in savings, especially in PJM: study

A new study says building more high-voltage power lines between and within regions could save electricity customers billions of dollars, with the biggest benefit going to the PJM Interconnection, the grid operator covering much of the Mid-Atlantic and parts of the Midwest. The study looked at 13 proposed transmission projects across the eastern half of the country and found they could produce up to $15.3 billion in net savings through 2050. PJM alone could see $6.7 billion in benefits over 40 years, more than any other region studied.

The idea is that bigger, better-connected power lines let cheaper electricity move from where it's generated to where it's needed, so utilities don't have to build as many expensive local power plants or smaller transmission lines to keep the lights on. That, in turn, could help hold down retail electric rates and make the grid more reliable during extreme weather.

For homeowners, this is not a program to sign up for or a rebate to claim. It is a study meant to influence how utilities and regulators plan future grid investments. If regions like PJM eventually approve these larger transmission projects, the study's authors argue the payoff would show up over time as lower electric bills and fewer local reliability problems, rather than any immediate change to your home or your rates. Whether and how quickly that happens depends on decisions still to come from grid operators and regulators.