Overview
Union Substation is an operational electrical substation owned by Tennessee Valley Authority in the United States. It handles voltages of 500 kV and 161 kV, serving as a critical node in the regional transmission grid.
Union Substation is an operational electrical substation located in the United States, owned and operated by the Tennessee Valley Authority (TVA). The facility handles high-voltage transmission at 500 kV and 161 kV, indicating its role in bulk power transfer and grid stability within the TVA service area. As a substation operating under the jurisdiction of the U.S. Federal Energy Regulatory Commission (FERC) and subject to North American Electric Reliability Corporation (NERC) reliability standards, Union Substation adheres to strict operational protocols for voltage regulation, protection coordination, and system redundancy. The dual voltage levels suggest it serves as a step-down or interconnection point between transmission and sub-transmission networks. The substation's location in northern Mississippi supports TVA's integrated power system, which supplies electricity to approximately 10 million consumers across seven southeastern states. Its operational status and voltage class position it as a medium-to-large facility within the U.S. electrical infrastructure, contributing to regional energy reliability and economic activity.
Environmental context
The substation is situated in a rural area of northeastern Mississippi, characterized by mixed agricultural and forested land. Its operation involves electromagnetic fields and potential oil leakage from transformers, though modern containment systems mitigate soil and water contamination risks. The facility's high voltage lines traverse habitats for local wildlife, requiring vegetation management that balances grid reliability with ecological considerations.
Frequently asked questions
Union Substation is located in the United States, specifically in the state of Mississippi, near the coordinates 34.377764, -88.858915. It is owned and operated by the Tennessee Valley Authority.
Union Substation handles two voltage levels: 500,000 volts (500 kV) and 161,000 volts (161 kV). These high voltages are typical for transmission substations that interconnect major power lines.
Union Substation is owned and operated by the Tennessee Valley Authority (TVA), a federally owned corporation that provides electricity to parts of seven southeastern states.
As part of the U.S. electrical grid, Union Substation must comply with NERC reliability standards and FERC regulations. These cover grid stability, cybersecurity, and maintenance practices.
A 500 kV substation like Union Substation serves as a major hub for transmitting large amounts of electricity over long distances. It steps down voltage for regional distribution or interconnects different parts of the transmission network.