en.Wedoany.com Reported - On June 26, the first unit of the Shuangjiangkou Hydropower Station, a landmark project in the global hydropower construction sector and home to the world's tallest dam, was connected to the grid. This project, operated by the Dadu River Shuangjiangkou branch of China Energy Investment Corporation (CHN Energy), provides new support for the construction of a clean energy supply system in Southwest China and the realization of the "dual carbon" goals.
The Shuangjiangkou Hydropower Station, a key national energy project located in Ma'erkang City and Jinchuan County within the Aba Tibetan and Qiang Autonomous Prefecture of Sichuan Province, serves as a control reservoir and leading hydropower station on the upper reaches of the Dadu River. Primarily focused on power generation while also providing flood control, the station has a total installed capacity of 2,000 MW and an average annual power generation of 7.7 billion kWh.
The project received national approval in 2015 and was constructed over 11 years. Currently, the project has completed its second-phase water storage, meeting the conditions for unit power generation. The first unit has successfully achieved its grid-connected power generation target, with overall operating conditions stable, safe, and controllable.
The Shuangjiangkou Reservoir, with a total storage capacity of 2.9 billion cubic meters, has annual regulation capability. Once operational, it will provide an average annual power gain of 6.6 billion kWh to downstream cascade power stations, enhance the peak-shaving and frequency-regulation capabilities of the Sichuan power grid, optimize the power system's energy structure, effectively raise the flood control standards of the entire Dadu River basin, and become a crucial flood control safety barrier on the upper reaches of the Yangtze River.
The Shuangjiangkou Dam, a gravel soil core rockfill dam with a maximum height of 315 meters, is the tallest dam in the world. The total fill volume of the dam exceeds 46 million cubic meters. If the earth and rock were stacked into a wall one meter high, one meter wide, and one meter long, it would stretch around the Earth's equator.
As a landmark project in the global hydropower construction sector, the Shuangjiangkou Hydropower Station also features the highest in-situ stress powerhouse among similar completed projects in China, China's first ultra-long-distance dam fill material transport and mixing system, the world's largest capacity hydraulic hoist, the world's largest cross-section spillway tunnel in hydropower engineering, and the world's largest variable cross-section vortex shaft under construction. Its generating units have a water head variation of 80 meters, with a maximum flood discharge head of 250 meters.
With the commissioning of the Shuangjiangkou Hydropower Station, CHN Energy's installed capacity of hydropower and new energy in the Dadu River basin has reached nearly 15,000 MW, delivering over 60 billion kWh of clean energy annually. This can save approximately 17 million tons of coal and reduce carbon dioxide emissions by about 46 million tons, strongly supporting the economic development and ecological protection of the Chengdu-Chongqing region, promoting industrial innovation and international openness, and contributing to the construction of the Chengdu-Chongqing Economic Circle to create a strategic highland for opening up to the west.
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