Overview
ComEd Sawyer Substation is an operational electrical substation in Chicago, Illinois, owned and operated by Commonwealth Edison. It operates at 138 kV, serving the local power grid.
ComEd Sawyer Substation is an operational electrical substation located in Chicago, Illinois, United States. Owned and operated by Commonwealth Edison (ComEd), a major utility in the region, the substation plays a key role in the local electrical infrastructure. With a voltage level of 138 kV, it is classified as a transmission-level substation, contributing to the stability and reliability of the power grid in the Chicago area. The substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which set standards for grid reliability and interstate electricity transmission. As part of ComEd's network, it adheres to NERC's Critical Infrastructure Protection (CIP) standards and FERC's regulations for transmission assets. The 138 kV voltage level is typical for sub-transmission or distribution substations, serving to step down power for local distribution or interconnect with other transmission lines. Located in an urban area, the substation is critical for supplying electricity to residential, commercial, and industrial customers in Chicago. Its operational status ensures continued grid stability and power delivery. The facility's role in the ComEd system underscores its importance in maintaining reliable electrical service in one of the largest metropolitan areas in the United States.
Environmental context
The substation is situated in an urban environment in Chicago, which influences its operational considerations. Urban substations often face challenges such as limited space, higher ambient temperatures due to heat island effects, and proximity to sensitive receptors. The 138 kV equipment is typically enclosed or shielded to minimize electromagnetic fields. The site's location near residential and commercial areas requires adherence to noise and safety regulations. The substation's design and maintenance practices aim to mitigate environmental impacts while ensuring reliable power delivery.
Frequently asked questions
ComEd Sawyer Substation is located in Chicago, Illinois, United States, at coordinates 41.804758, -87.713162.
ComEd Sawyer Substation operates at 138 kV, which is a common voltage 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 U.S. bulk power system, the substation must comply with NERC reliability standards and FERC regulations for transmission assets.
A 138 kV substation typically steps down transmission voltage for local distribution or interconnects transmission lines, playing a key role in grid stability and power delivery.