The Largest Hydroelectric Power Plants in the World
5 min read
At present, the largest hydroelectric power plant in the world is the Three Gorges Dam on the Yangtze River in China. Its installed capacity is 22,500 MW, followed by the Baihetan hydropower plant in China with 16,000 MW and Itaipú on the border between Brazil and Paraguay with 14,000 MW.
Three Gorges Dam, China (map)
Three Gorges Dam.
Construction of the Three Gorges Dam on the Yangtze River in China began in 1994. The dam is 181 metres high and 2,335 metres long. With an installed capacity of 22,500 MW, its hydroelectric power plant is the largest in the world. In addition to electricity generation, the project provides flood protection and improves navigation on the Yangtze River.
The project has also had significant environmental and social impacts. About 1.24 million people from more than 100 towns and over 1,000 villages had to be relocated during the creation of the reservoir. Numerous archaeological and cultural sites were also lost. The reservoir has affected the surrounding landscape, contributing to problems such as landslides, erosion and sediment accumulation.
The Three Gorges Reservoir extends for approximately 600 km along the Yangtze River and has a surface area of about 1,084 km2.
Baihetan Hydropower Station, China (map)
The Baihetan hydroelectric power plant is located on the Jinsha River, the upper section of the Yangtze River, on the border between the Chinese provinces of Sichuan and Yunnan. With an installed capacity of 16,000 MW, it is the second largest hydroelectric power plant in the world after the Three Gorges Dam. The plant has 16 generating units, each with a capacity of 1,000 MW — the largest hydropower generating units in the world. All 16 units entered operation in December 2022.
The power plant uses a 289-metre-high double-curvature concrete arch dam. Its reservoir has a total storage capacity of approximately 20.6 billion m3. Baihetan is designed to generate an average of about 62.4 TWh of electricity annually and also contributes to flood control and improved navigation conditions.
Itaipú Dam, Brazil/Paraguay (map)
Itaipú is a hydroelectric power plant on the Paraná River on the border between Brazil and Paraguay. Operated by the binational entity Itaipu Binacional, it was the world’s largest hydroelectric power plant by installed capacity before the completion of the Three Gorges project and is currently the third largest. The dam is 196 metres high and approximately 8 km long. Its 20 generating units, each rated at 700 MW, provide a total installed capacity of 14,000 MW.
The reservoir covers an area of approximately 1,350 km2. Itaipú supplies around 7% of Brazil’s electricity consumption and more than three-quarters of Paraguay’s.
The name “Itaipú” is commonly translated as “the sounding stone”.
The Yamdrok hydroelectric power plant in Tibet uses water from Yamzho Yumco Lake, situated more than 4,400 metres above sea level.
4 pictures
4 pictures
Guri Dam (Simón Bolívar), Venezuela (map)
The highest situated hydroelectric power plant was built in Tibet at the Yamzho Yumco lake, over 4,400 meters above sea level.
The third biggest hydroelectric power plant in the world is the Guri in Venezuela. The construction of this plant started in 1963, the first phase was completed in 1978 and the second in 1986. The dam is 7,426 meters long and 162 meters high. 20 turbo-generators with a total installed capacity of 10,200 MW yearly produce 47,000 GWh of electricity.
Note: 47,000 GWh is the actual value of electric energy produced, 87,000 GWh could be theoretically produced if there was enough water.
5 pictures
5 pictures
| Hydroelectric power plant | Installed capacity | Country | Completed | Reservoir surface |
|---|---|---|---|---|
| Three Gorges | 22,500 MW | China | 2012 | 1,084 km2 |
| Baihetan | 16,000 MW | China | 2022 | ≈ 217 km2 |
| Itaipú | 14,000 MW | Brazil/Paraguay | 2007 | 1,350 km2 |
| Xiluodu | 13,860 MW | China | 2014 | ≈ 134 km2 |
| Belo Monte | 11,233 MW | Brazil | 2019 | 478 km2 |
| Guri (Simón Bolívar) | 10,235 MW | Venezuela | 1986 | 4,250 km2 |
| Wudongde | 10,200 MW | China | 2021 | ≈ 127 km2 |
| Tucuruí | 8,370 MW | Brazil | 2007 | 2,430 km2 |
| Grand Coulee | 6,809 MW | USA | 1980 | 324 km2 |
| Longtan | 6,426 MW | China | 2009 | 377 km2 |
| Sayano-Shushenskaya | 6,400 MW | Russia | 1985 | 621 km2 |
| Xiangjiaba | 6,400 MW | China | 2014 | 95.6 km2 |
| Krasnoyarsk | 6,000 MW | Russia | 1972 | 2,000 km2 |
| Nuozhadu | 5,850 MW | China | 2014 | 320 km2 |
| Robert-Bourassa GS * | 5,616 MW | Canada | 1981 | 2,835 km2 |
| Churchill Falls | 5,429 MW | Canada | 1971 | 6,527 km2 |
| * Robert-Bourassa generating station |
The Highest Hydraulic Head
The Bieudron hydroelectric power plant in the canton of Valais, Switzerland, operates with one of the highest hydraulic heads in the world. The plant is supplied with water from the Grande Dixence reservoir, situated at an elevation of 2,364 metres above sea level, through a high-pressure system with a maximum hydraulic head of 1,883 metres.
3 pictures
3 pictures
