Powering Growth and Affordability: The Role of Transmission in Economic and National Security

Powering Growth and Affordability: The Role of Transmission in Economic and National Security, prepared by S&P Global CERA Consulting for the Electricity Customer Alliance (ECA), National Grid, and Converge Strategies, evaluates four regions across the Eastern Interconnection—the Northeast, PJM, Southwest Power Pool (SPP) and Midcontinent Independent System Operator (MISO) South, and SERC—comparing futures in which transmission expansion is constrained with scenarios that allow greater interregional transmission development.

The analysis finds that transmission delivers more benefits than costs in every scenario studied, generating as much as $15.3 billion in net system value through 2050. Critically for customers, scenarios with expanded interregional transmission deliver two to three times more value than scenarios that rely on more constrained, local solutions.