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Source: People's Republic of China in Russian – People's Republic of China in Russian –
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Source: People's Republic of China – State Council News
GUANGZHOU, Sept. 17 (Xinhua) — China on Tuesday started construction of an ultra-high-voltage (UHV) transmission line that will carry green electricity from southwest China's Xizang Autonomous Region (SAR) to the Guangdong-Hong Kong-Macao Greater Bay Area in south China.
The total investment in the construction of the 800 kV UHVDC power transmission line is estimated at 53.2 billion yuan (approximately 7.5 billion US dollars). The line starts in Chamdo SAR and ends in Shenzhen in Guangdong Province, said Dong Yanle, deputy general manager of the engineering and construction department of China Southern Power Grid.
The approximately 2,681-km project crosses four provincial-level administrative divisions, including Yunnan Province in southwest China and Guangxi Zhuang Autonomous Region in south China. It is China's first UHVDC, crossing the Qinghai-Tibet Plateau, Yunnan-Guizhou Plateau and the mountainous and hilly terrain of southern China.
Once operational in 2029, the 10GW rated capacity line will annually supply more than 43 billion kWh of electricity from the clean energy base in southeast Xizang to the Guangdong-Hong Kong-Macao Greater Bay Area.
According to Dong Yanle, the line will transmit only electricity generated by green energy sources. The electricity supplied by this UHVDC will be equivalent to saving about 12 million tons of standard fuel per year, while reducing annual carbon dioxide emissions by 33 million tons. “This will make economic development greener and cleaner,” he emphasized.
"The project aims to solve global problems such as large-scale clean power transmission, the application of flexible direct current technology to ultra-high-altitude conditions, and construction and operation under extremely complex natural conditions," said Zhao Hong, chief scientist of China Southern Power Grid.
Almost 90 percent of UHVDC will be located in mountainous terrain. Its builders will have to solve complex problems and overcome risks such as permafrost, geological disasters, environmental protection requirements and operation in uninhabited regions. Other challenges include research and development of new technologies and equipment for direct current transmission suitable for areas located at an altitude of more than 4,300 meters above sea level.
In recent years, China has invested heavily in building ultra-high-voltage transmission lines to transport electricity from the country's resource-rich western regions to the country's economically developed eastern regions, as well as to increase consumption of clean energy sources and stimulate green growth.
Xizang, one of China's key energy bases, is rich in clean energy sources such as wind, solar and hydropower. Several ultra-high-voltage transmission lines have already been built to transmit excess electricity to different parts of the country.
The Guangdong-Hong Kong-Macao Greater Bay Area, one of China's most economically dynamic regions, is also a leader in green and high-quality economic growth.
In 2024, the Greater Bay Area's green power trading volume increased 12-fold year-on-year to reach 49.1 billion kWh, accounting for 39 percent of China's total. -0-
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