Exelon Corp's ComEd Expands Wind Energy Capacity with New Substations

In a significant development for renewable energy infrastructure, ComEd, a subsidiary of Exelon Corporation, announced on July 9, 2026, the successful energization of two new transmission substations in Illinois. This advancement will unlock the potential for integrating up to 550 megawatts (MW) of wind energy into the grid, a move that aligns with the growing demand for electricity and the state’s commitment to renewable energy.

The newly commissioned substations, which operate at a voltage level of 345 kV, are located in LaSalle and Woodford counties. They are strategically designed to support the interconnection of two upcoming utility-scale wind farms—Osagrove Flats, expected to generate 150 MW, and Panther Grove, projected at 400 MW. These wind farms are slated to become operational in late 2026 and early 2027, respectively.

The capacity provided by these substations is substantial, estimated to serve approximately 264,000 homes for an entire year, thus making a notable contribution to the energy landscape of northern Illinois.

With the demand for electricity surging across the United States, particularly in Illinois, ComEd has recognized the urgent need to expand its generation resources. The company emphasizes that this expansion is essential to alleviate upward pressure on capacity costs driven by a supply and demand imbalance in the PJM market, which serves 65 million people across 13 states and the District of Columbia.

Gil Quiniones, President and CEO of ComEd, highlighted the company’s commitment to providing a reliable and modern energy grid. “These two new substations are part of ComEd’s drive to expand transmission capacity, enabling more clean energy resources to come online,” Quiniones stated. He underscored the importance of this infrastructure in supporting Illinois' economic development goals and ensuring affordable power for customers.

Remarkably, the construction of these substations was completed over four months ahead of schedule. The project involved significant labor efforts, totaling more than 113,000 hours, which included the installation of 16 new transmission towers and over 58 miles of fiber optic lines. The initiative also included nearly half a mile of new conductor installation, with ongoing plans to further enhance the system's reliability.

ComEd is not only focused on expanding physical infrastructure but also on leveraging technology to facilitate the integration of renewable energy sources into the grid. The company has connected more than 1.7 gigawatts (GW) of Distributed Energy Resources (DERs), positioning Illinois as a leader in DER capacity within the Midwest.

To effectively manage this growth, ComEd is utilizing Distributed Energy Resource Management Systems (DERMS). This technology combines software control systems with hardware components like IoT gateways and smart inverters, allowing for dynamic management of grid conditions. This approach is crucial for unlocking additional hosting capacity, expediting the deployment of renewable energy projects, and increasing access to affordable clean energy for customers throughout Illinois.

The commissioning of the new substations marks a pivotal step forward for ComEd and Exelon Corporation in their efforts to enhance Illinois' renewable energy capabilities. By investing in infrastructure and leveraging innovative technology, ComEd is positioning itself to meet the growing energy demands of its customers while promoting sustainability and economic growth. The future looks bright for Illinois as it continues to embrace renewable energy solutions.