Overview
Stillman Valley Substation is an operational electrical substation in Illinois, USA, owned and operated by Commonwealth Edison. It operates at 138 kV, serving the regional power grid.
Stillman Valley Substation is an operational electrical substation located in Illinois, United States. Owned and operated by Commonwealth Edison, a major utility in the region, the facility plays a key role in the local electrical infrastructure. The substation operates at a voltage of 138 kV, which is typical for sub-transmission and distribution-level assets in the US grid. As part of the Commonwealth Edison network, Stillman Valley Substation is subject to NERC reliability standards and FERC regulation for transmission-level assets. The 138 kV voltage class is commonly used for regional power distribution, connecting higher-voltage transmission lines to local distribution networks. The substation likely includes switchgear, transformers, and protection systems compliant with ISO/IEC 61850 standards for substation automation. The substation's location in rural Illinois supports grid stability for the surrounding area. Its operational status ensures continued service to residential, commercial, and industrial customers. The facility contributes to the reliability of the regional electrical grid, which is critical for economic activity and community well-being.
Environmental context
The substation is situated in a rural area of Illinois, where agricultural land and small communities dominate the landscape. Electrical infrastructure in such settings typically has a lower environmental footprint compared to urban installations, but still requires careful management of electromagnetic fields, oil containment from transformers, and vegetation clearance around rights-of-way. The 138 kV voltage level poses minimal risk to wildlife compared to higher-voltage lines.
Frequently asked questions
Stillman Valley Substation is located in Illinois, United States, at coordinates 42.117282, -89.210098.
Stillman Valley Substation operates at 138 kV, a common voltage for sub-transmission and distribution in the US.
Stillman Valley Substation is owned and operated by Commonwealth Edison, a major electric utility in Illinois.
As part of the US grid, Stillman Valley Substation must comply with NERC reliability standards and FERC regulations for transmission assets.
A 138 kV substation typically steps down voltage from higher transmission lines for distribution to local networks, serving residential, commercial, and industrial customers.