The Xizang-Guangdong direct current electricity transmission project - a key cross-regional power transmission project for the 14th Five-Year Plan period (2021-25) was launched on Tuesday.
It marks the world's most technologically advanced
and largest flexible direct current transmission project by investment scale, according to state broadcaster CCTV News.
The 2,681-kilometer line will start in Xizang Autonomous Region, run through Yunnan Province
and Guangxi Zhuang Autonomous Region,
and end in Guangdong Province. Four converter stations will be set up in Qamdo
and Nyingchi in Xizang as well as in Guangzhou
and Shenzhen in Guangdong Province, the report said.
When fully operational in 2029, the project will transmit more than 43 billion kilowatt-hours (kWh) each year to the Guangdong-Hong Kong-Macao Greater Bay Area - equivalent to half of the Three Gorges Dam's annual power output - entirely from clean energy sources, it said.
Spanning more than 2,600 kilometers, the route crosses three major geographic tiers - the Qinghai-Tibetan Plateau, the Yunnan-Guizhou Plateau,
and South China's mountains. It traverses peaks up to 5,300-meter mountains
and the geologically complex Hengduan Mountains, with 90 percent of the line running through mountainous terrain.
The variability of renewable energy posed significant challenges to the project. To ensure stable delivery of green energy, the project uses ultra-high-voltage multi-terminal flexible direct current transmission technology, enabling flexible dispatch of green power across regions
and timeframes. This system reduces current fluctuations
and grid shocks, ensuring uninterrupted supply - a process completing in just nine milliseconds, the news report said.
Editor:Evan
