Overview
Johnsonville 500kV Substation is a TVA-operated electrical substation in Tennessee, United States. It operates at 500 kV, serving as a critical node in the regional transmission grid.
Johnsonville 500kV Substation is a high-voltage electrical substation located in Tennessee, United States. Operated by the Tennessee Valley Authority (TVA), it is a key asset in the regional transmission network, handling 500 kV voltage levels typical of bulk power transmission. The substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC). As a 500 kV facility, it plays a vital role in grid stability and power transfer across the TVA service area, which covers parts of seven southeastern states. Environmentally, the substation's location in a rural area near the Tennessee River minimizes direct urban impact but requires careful management of electromagnetic fields and vegetation. Its role in integrating power from TVA's generation assets, including hydroelectric and nuclear plants, underscores its significance in maintaining reliable electricity supply to millions of customers.
Environmental context
Located in a rural area of Tennessee, the Johnsonville 500kV Substation operates in a region with mixed agricultural and forested land. The high voltage level (500 kV) necessitates significant clearance and vegetation management to prevent outages. The substation's proximity to the Tennessee River requires attention to stormwater runoff and potential impacts on local waterways. TVA's environmental stewardship practices include habitat conservation and erosion control measures typical of large transmission infrastructure.
Frequently asked questions
Johnsonville 500kV Substation is located in Tennessee, United States, near the Tennessee River. Its coordinates are approximately 36.0238° N, -87.9816° W.
Johnsonville 500kV Substation operates at 500,000 volts (500 kV), which is a standard high-voltage level for bulk power transmission in the United States.
The substation is operated by the Tennessee Valley Authority (TVA), a federally owned electric utility company serving the Tennessee Valley region.
As a transmission asset in the US, the substation must comply with NERC reliability standards and FERC regulations. TVA also follows its own internal standards for safety and environmental management.
A 500 kV substation like Johnsonville serves as a major node in the high-voltage transmission network, stepping down voltage for distribution or interconnecting multiple transmission lines to ensure grid stability and reliable power delivery.