Core Insights - ComEd has completed the expansion of the 765 kV Wilton Center substation, which is essential for connecting a significant number of utility-scale renewable energy projects to the grid starting in 2026 [1][2] Company Developments - The expansion allows ComEd to deliver over 2,000 megawatts of new renewable generation to meet increasing electricity demands from residential and business customers [2] - The Wilton Center substation's yard has been increased by 50% to 1.5 million square feet, minimizing environmental impact by reusing approximately 80,000 tons of topsoil and 90,000 tons of on-site clay [2] - New equipment installed includes 765 kV circuit breakers, transformers, disconnect switches, and extensive protection and control upgrades [2] Industry Context - The Wilton Center substation, built in 1968, supports the highest voltage transmission lines in the U.S., which are crucial for efficient long-distance power transmission [3] - After a minor upgrade planned for Q2 2026, the transmission system will support five wind farms and two solar farms, generating up to 2,450 megawatts of renewable energy for the PJM energy market [4] Project Details - The expansion supports several renewable projects, including the Heritage Prairie wind farm with up to 850 MW capacity, two 400 MW wind farms by Panther Grove Wind Energy, and other projects totaling significant renewable energy output [7]