Editing Tennessee Valley Authority (section)

==== Electric transmission ====
TVA owns and operates its own [[electric grid]], which consists of approximately {{convert|16,200|mi}} of lines, one of the largest grids in the United States. This grid is part of the [[Eastern Interconnection]] of the [[North American power transmission grid]], and is under the jurisdiction of the [[SERC Reliability Corporation]].<ref>{{cite web |url=https://www.eia.gov/todayinenergy/detail.php?id=27152 |title=U.S. electric system is made up of interconnections and balancing authorities |author=<!--Not stated--> |date=July 20, 2016 |website=eia.gov |publisher=Energy Information Administration |access-date=January 2, 2022 |archive-date=January 2, 2022 |archive-url=https://web.archive.org/web/20220102031128/https://www.eia.gov/todayinenergy/detail.php?id=27152 |url-status=live }}</ref> Like most North American utilities, TVA uses a maximum transmission voltage of 500 kilovolts (kV), with lines carrying this voltage using [[Overhead power line#Bundle conductors|bundled conductors]] with three conductors per phase. The vast majority of TVA's transmission lines carry 161 kV, with the company also operating a number of sub-transmission lines with voltages of 69 kV and 46kV. They also operate a small number of 115kV and 230kV lines in Alabama and Georgia that connect to [[Southern Company]] lines of the same voltage.<ref name=clemnelson>{{cite report|last1=Clem|first1=Clayton L.|last2=Nelson|first2=Jeffrey H.|title=2010 International Conference on High Voltage Engineering and Application|date=October 2010|chapter=The TVA Transmission System: Facts, Figures and Trends|pages=1–11|chapter-url=https://zenodo.org/record/1270775|publisher=Proceedings of the 2010 IEEE International Conference on High Voltage Engineering and Application|doi=10.1109/ichve.2010.5640878|isbn=978-1-4244-8283-2|access-date=2021-04-18|via=[[Zenodo]]|archive-date=June 24, 2021|archive-url=https://web.archive.org/web/20210624202734/https://zenodo.org/record/1270775|url-status=live}}</ref><ref>{{Cite map |year = 2011 |title = NERC Transmission Planning Map |url = http://www.oatioasis.com/TVA/TVAdocs/TVA_Transmission_Map_2011_r2.pdf |publisher = North American Electric Reliability Corporation |access-date= 2021-04-18 |via = [[Open Access Same-Time Information System]] |url-status=dead |archive-url=https://web.archive.org/web/20160909085921/http://www.oatioasis.com/TVA/TVAdocs/TVA_Transmission_Map_2011_r2.pdf |archive-date=September 9, 2016 }}</ref>