Overview
North Chicago Substation is an operational 138 kV substation owned and operated by Commonwealth Edison in North Chicago, Illinois. It plays a key role in the regional electrical grid.
North Chicago Substation is a 138 kV electrical substation located in North Chicago, Illinois, United States. Owned and operated by Commonwealth Edison (ComEd), a major utility serving northern Illinois, the facility is part of the regional transmission and distribution network. The substation's voltage level of 138 kV places it in the medium-to-high voltage range, typical for sub-transmission and distribution substations that supply power to industrial and residential areas. Operating under the regulatory oversight of the Federal Energy Regulatory Commission (FERC) and the North American Electric Reliability Corporation (NERC), the substation must comply with mandatory reliability standards. ComEd, as a subsidiary of Exelon, adheres to NERC's Critical Infrastructure Protection (CIP) standards and FERC's regulations for transmission-level assets. The substation serves the North Chicago area, supporting local grid stability and power delivery to residential, commercial, and industrial customers. Its location near Lake Michigan may influence environmental considerations such as corrosion resistance for equipment. As part of ComEd's network, it contributes to the reliability of the regional power system, which serves millions of customers in northern Illinois.
Environmental context
The substation is situated in an urbanized area of North Chicago, near Lake Michigan. The local environment includes mixed residential and industrial land use. Electrical infrastructure in such settings must consider corrosion from lake-effect moisture and salt spray. The substation's 138 kV equipment is designed to withstand these conditions, and standard environmental management practices are in place to prevent oil leaks from transformers and minimize electromagnetic field exposure.
Frequently asked questions
North Chicago Substation is located in North Chicago, Illinois, United States, at coordinates 42.321186, -87.876515.
North Chicago Substation operates at 138 kV, which is a common voltage level for sub-transmission and distribution substations in the United States.
The substation is owned and operated by Commonwealth Edison (ComEd), a major electric utility serving northern Illinois.
As part of the US electrical grid, the substation must comply with NERC reliability standards and FERC regulations for transmission-level assets.
A 138 kV substation steps down transmission voltage for distribution to local networks, ensuring reliable power delivery to residential, commercial, and industrial customers.