Jinping is located at the intersection of Muli, Yanyuan and Mianning counties in Liangshan Prefecture. The Yalong River meets Jinping Mountain here, and goes down the mountain to form a 150-kilometer-long Jinping River Bay in the shape of "". For hydropower experts, this is an excellent place to build dams. In this article, I will take you to explore the great project of Jinping Hydropower Station. It is the crystallization of modern human science and technology and a symbol of human wisdom.
The straight-line distance between the two ends of Jinping Dahe Bay is only 17 kilometers, and the natural drop of the water head reaches 310 meters.
Jinping first-class hydropower station
A double-arch dam was built upstream, that is, the Jinping Class I Hydropower Station, and then drilled between the upstream and downstream ends to open up a 17-kilometer-long diversion tunnel, and most of the water flowing down from the upstream hydropower station was led to the Jinping II Hydropower Station downstream through the diversion hole, and the huge drop of 310 meters was used to generate electricity. The first and second levels form the Gemini constellation, which works in harmony with each other.
Jinping first-class hydropower station has a capacity of 3.6 million kilowatts. Jinping first-class dam is a concrete double-curved arch dam, the dam height is 305 meters, the elevation of the dam crest is 1885 meters, the lowest elevation of the foundation surface is 1580 meters, the top thickness of the arch crown beam is 16 meters, and the bottom thickness of the arch crown beam is 63 meters. This gigantic project provides important support for local power generation and water management. As a concrete double-curved arch dam, its scale and technical level are very impressive.
The construction of Jinping Class I Hydropower Station started on November 12, 2005, the first unit was put into operation on August 30, 2013, and all units were put into operation on July 12, 2014, making an important contribution to China's clean energy development.
The engineering geological conditions of Jinping first-class hydropower station are extremely complex, with the characteristics of "five highs and one deep" such as high mountains and valleys, high arch dams, high slopes, high geostress, high water head and deep unloading, etc., and the engineering construction is extremely challenging, and it is recognized by domestic and foreign experts as a giant hydropower project with "the most complex geological conditions, the worst construction environment, the greatest technical difficulty, and the greatest difficulty in construction management".
Jinping II Hydropower Station
The development task of Jinping II Hydropower Station is to generate electricity, with a normal water storage level of 1646m, a dead water level of 1640m, and a daily regulated storage capacity of 4.96 million m3. The installed capacity of the power station is 4800MW, and the single unit capacity is 600MW. The rated head is 288m, and the average power generation for many years is 242With 300 million kW·h, it is the backbone project of China's "Sichuan-to-East Power Transmission", and is currently the world's largest buried long-water diversion power station with the largest scale and the most complex construction conditions.
Jinping II Hydropower Station is a low-gate, long-tunnel, large-capacity diversion power station, and the main building of the hub is composed of three parts: the first hub, the diversion system and the power generation system.
On January 30, 2007, the main project officially started construction. The project is planned to be stored in October 2012, the first batch of two units to generate electricity at the end of December 2012, and the project will be completed by the end of September 2015.
Due to the complexity and special environment, Jinping II Hydropower Station encountered a series of uncertainties in the construction, through technological innovation, the project finally successfully overcome the world-class technical problems such as high buried depth, high geostress, high pressure water inrush, high head and large-capacity unit design and manufacturing, which is a milestone for the construction of China's ultra-long diversion tunnel and leading the progress of national hydropower science and technology.
Through the Jinping Hydropower Station, we see the huge potential of clean energy and the unremitting pursuit of sustainable development. The construction of Jinping Hydropower Station is not only an engineering miracle, but also a model of scientific and technological innovation. It demonstrates the greatness of human wisdom and scientific and technological strength, and has made important contributions to the development of clean energy in China. In the future, we look forward to more hydropower stations providing more energy support for social development and making important contributions to our green and environmentally friendly life.
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