Walthall Substation - Virginia Electrical Substation Operated by Dominion Energy

Walthall Substation is an operational electrical substation located in Virginia, United States. Owned and operated by Virginia Electric and Power Company (a Dominion Energy subsidiary), this facility is part of the high-voltage transmission network that delivers electricity across the region. The substation's 115 kV voltage level places it in the medium-to-high voltage range, typical for distribution and sub-transmission applications. Operating under the jurisdiction of the U.S. Federal Energy Regulatory Commission (FERC) and subject to North American Electric Reliability Corporation (NERC) reliability standards, Walthall Substation adheres to stringent grid stability and cybersecurity requirements. As part of the PJM Interconnection regional transmission organization, the substation supports the reliable flow of power across the Mid-Atlantic and Midwest states. The facility's equipment likely includes circuit breakers, transformers, and switchgear compliant with IEEE and IEC standards. Walthall Substation plays a critical role in maintaining grid reliability for the surrounding communities and industrial users. Its location in central Virginia supports the integration of diverse generation sources, including natural gas, nuclear, and renewables. The substation's operational status ensures continued service to the regional power grid, contributing to the resilience and efficiency of the electrical infrastructure in the United States.

The substation is situated in a region with a temperate climate, where seasonal temperature variations influence electricity demand for heating and cooling. Its location in a mixed urban-rural area means the facility must balance land use with nearby residential and natural habitats. The 115 kV voltage level indicates a moderate environmental footprint, with typical electromagnetic field considerations managed through standard siting and shielding practices.