ComEd commissioned two 345 kV transmission substations that will enable the connection of up to 550 MW of wind generation in LaSalle and Woodford counties, Illinois.
The new infrastructure prepares the grid to receive electricity from the future wind farms Osagrove Flats and Panther Grove. Both projects are expected to begin commercial operations between late 2026 and early 2027.
According to ComEd, the facilities increase transmission capacity and improve conditions for incorporating large-scale renewable generation.
The substations also strengthen the reliability of the regional power system. Their role will be to manage the flow of energy from the new farms and facilitate its delivery to the market operated by PJM.
The company believes that expanding transmission infrastructure will be key to meeting growing electricity demand. This expansion could help increase available supply and reduce the pressure that capacity costs place on consumers.
Osagrove Flats and Panther Grove will add 550 MW
On the one hand, the Osagrove Flats wind farm will have an installed capacity of 150 MW. It is expected to enter operation in late 2026.
On the other hand, Panther Grove will contribute 400 MW and would begin operating in early 2027. Together, the two developments will reach the 550 MW enabled by the new substations.
ComEd estimates that this capacity is equivalent to the annual electricity consumption of about 264,000 households. The output will be delivered to PJM’s regional grid, which serves about 65 million people in 13 states and the District of Columbia.
The works were completed four months ahead of schedule
Work began in 2023 and was completed more than four months ahead of schedule. The project logged more than 113,000 work hours.
During construction, 16 transmission towers and more than 58 miles of fiber were installed. Nearly half a mile of new conductor was also strung.
Likewise, ComEd plans to carry out additional work to improve system reliability and increase its capacity to accommodate more energy resources.
These two new substations are part of ComEd’s effort to expand transmission capacity.
said Gil Quiniones, the company’s president and CEO.
The executive explained that the infrastructure will make it possible to integrate more clean energy resources and meet Illinois’ growing electricity needs.
ComEd strengthens its renewable integration strategy
To date, ComEd’s grid has connected more than 1.7 GW of distributed energy resources. This capacity places Illinois among the most active markets in the Midwest for deploying distributed generation.
In addition to building infrastructure, the company is using distributed energy resource management systems. These platforms combine software, sensors, internet of things gateways, and smart inverters.
Its goal is to monitor grid conditions in real time and unlock additional capacity for new projects. In doing so, ComEd aims to accelerate the connection of wind and solar facilities without relying solely on physical expansions.
ComEd is a subsidiary of Exelon Corporation and supplies electricity to more than 4.2 million customers in northern Illinois. Its service area includes about 70% of the state’s population.
Source: ComEd via Business Wire
Photo: shutterstock
