首次横跨三大地理阶梯 藏粤直流工程启动建设

Core Points - The construction of the Tibet-Guangdong ultra-high voltage direct current transmission project (Tibet-Guangdong DC Project) has commenced, marking a significant step in China's energy transmission strategy during the 14th Five-Year Plan [1][2] - This project is the first ultra-high voltage transmission line to cross the Tibetan Plateau, Yunnan-Guizhou Plateau, and South China hills, highlighting its geographical significance [1][2] Investment and Capacity - The total investment for the Tibet-Guangdong DC Project is approximately 53.2 billion yuan, with full operation expected by 2029, capable of delivering over 43 billion kilowatt-hours of electricity annually to the Guangdong-Hong Kong-Macao Greater Bay Area, all sourced from clean energy [1][2] - The project has a rated transmission capacity of 10 million kilowatts, surpassing the Kunming-Lijiang DC Project, and is expected to replace approximately 12 million tons of standard coal consumption, reducing carbon dioxide emissions by about 33 million tons annually [2] Technical Challenges - The project faces significant technical challenges, including construction at high altitudes (with nearly 90% of the line in mountainous areas and 30% in high-altitude regions), and the need for new technologies and equipment to operate at altitudes of 4,300 meters [1][2] - The project aims to address world-class technical challenges related to safely integrating renewable energy from high-altitude regions into the grid and ensuring long-distance transmission and consumption [2]