1. Belo Monte-Rio de Janeiro transmission line, Brazil – 2,543km
The 2,543km-long Belo Monte-Rio de Janeiro transmission line in Brazil is an 800kV ultra-high-voltage direct current (UHVDC) line that transmits electricity from the 11.2GW Belo Monte hydroelectric power plant located in Para to Rio de Janeiro, Brazil.
Construction of the transmission line, which is also known as the Belo Monte UHVDC Bipole II line, was started in September 2017 and completed in April 2019. The overhead transmission line, that has transmission towers 105m and taller, crosses 80 cities along its route from the Amazon to Brazil’s southeast coast. The line has two power converter stations and is capable of transmitting 4GW of electricity.
2. Rio Madeira transmission link, Brazil – 2,385km
The Rio Madeira transmission link in Brazil is a 600kV high-voltage direct current (HVDC) bipolar line commissioned in November 2013. It is capable of transmitting 7.1GW of power.
The Rio Madeira HVDC link transmits electricity from the Santo Antônio and Jirau hydropower plants on the banks of the Madeira River in north-west Brazil to major load centres in south-eastern Brazil. It connects the Porto Velho Collector Substation in the state of Rondônia to the Araraquara-2 Substation in the state of São Paulo.
3. Belo Monte-Estreito transmission line, Brazil – 2,092km
The Belo Monte-Estreito transmission line, also known as the Belo Monte UHVDC Bipole I line, is the first 800kV UHVDC transmission line to be constructed for delivering electricity from the Belo Monte hydroelectric power station in northern Brazil to south-east Brazil.
Commissioned in December 2017, the 2,092km-long UHVDC line originates from Xingu in Para and terminates at Estreito in Minas Gerais. The Belo Monte UHVDC Bipole I line is capable of transmitting 4GW of electricity.
4. Jinping-Sunan transmission line, China – 2,090km
The Jinping-Sunan transmission link in China is an 800kV UHVDC transmission line. Owned by State Grid Corporation of China (SGCC), the 7.2GW transmission link was put into operation in December 2012.
The line passes through eight Chinese provinces to transmit power generated from Guandi, Jinping, and Sichuan hydroelectric plants located on the Yalong River in central-western Sichuan province to the industrialised coastal area of Jiangsu province in eastern China. The AC voltage at both ends of the line is 525kV.
5. Xiangjiaba-Shanghai transmission line, China – 1,980km
The Xiangjiaba-Shanghai transmission line, with an overhead length of 1,980km, is an 800kV, 7.2GW line, owned by SGCC. The world’s first ever UHVDC transmission line, it started commercial operation in July 2010.
The Xiangjiaba-Shanghai link transmits power from the Xiangjiaba hydropower plant located in south-west China to the country’s major industrial and commercial hub, Shanghai. The link comprises a single overhead line and 28 high/ultra-high-voltage converter transformers. The AC voltage at both ends of the line is 525kV.
According to power-technology.com. Source of photo: internet