Overview
ComEd McCook 138kV-345kV Substation is an operational electrical substation in McCook, Illinois, owned and operated by Commonwealth Edison. It handles 138 kV and 345 kV voltage levels, serving the Chicago area.
ComEd McCook 138kV-345kV Substation is a key electrical infrastructure facility located in McCook, Illinois, United States. Owned and operated by Commonwealth Edison (ComEd), this substation is part of the regional transmission grid serving the greater Chicago metropolitan area. The facility operates at two voltage levels: 138 kV and 345 kV, indicating its role in both sub-transmission and high-voltage transmission. As a substation in the United States, ComEd McCook operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC). ComEd, a subsidiary of Exelon, is subject to reliability standards and grid management requirements. The 345 kV voltage level classifies this facility as a major transmission node, critical for bulk power transfer and grid stability in northern Illinois. The substation's location in McCook, a suburb southwest of Chicago, places it in a densely populated urban area with high electricity demand. Its role includes voltage transformation between 345 kV and 138 kV, facilitating power distribution to local utilities and industrial customers. The facility contributes to grid resilience and supports the integration of renewable energy sources in the region.
Environmental context
The substation is situated in an urban industrial area near McCook, Illinois, with proximity to the Chicago Sanitary and Ship Canal. The surrounding environment includes mixed residential and industrial land use. Electrical infrastructure like this substation can have localized environmental impacts such as electromagnetic fields and noise, but modern designs mitigate these effects. The facility's high voltage (345 kV) indicates its critical role in grid stability, which indirectly supports environmental goals by enabling efficient power transmission and reducing line losses.
Frequently asked questions
ComEd McCook 138kV-345kV Substation is located in McCook, Illinois, United States, approximately 15 miles southwest of downtown Chicago.
The substation operates at 138 kV and 345 kV, serving as a transmission node that steps voltage between these levels for regional power distribution.
The substation is owned and operated by Commonwealth Edison (ComEd), a major electric utility serving northern Illinois and a subsidiary of Exelon.
As part of the U.S. bulk power system, the substation must comply with NERC reliability standards and FERC regulations for transmission assets, including voltage regulation and grid stability requirements.
The 345 kV level classifies it as a high-voltage transmission substation, critical for long-distance power transfer and maintaining grid reliability in the Chicago metropolitan area.