Clean Power Plan Transmission Investments: It’s Not How Much, It’s How Soon

This report examines the impact of the Clean Power Plan on grid stability. The changing resource mix due to increased coal retirements and renewable energy will alter the pattern of power flows across the transmission system, requiring new lines, line upgrades, and reactive power devices to maintain grid stability. It concludes that across the country, the costs of these changes are likely to be minimal and pose no threat to reliability.