On June 30, 2021, the first unit of SDIC's Yalong River Yangfanggou Hydropower Station was connected to the grid for power generation. Yangfanggou Hydropower Station is located in the middle reaches of the Yalong River in Muli County, Liangshan Prefecture, Sichuan Province. The dam is 155 meters high and has a total installed capacity of 1.5 million kilowatts. The annual average power generation is about 6.856 billion kWh and the total project investment is about 20 billion. yuan.

Yangfanggou Hydropower Station

Yangfanggou Hydropower Station is a major national clean energy project, a key power source project of the country and Sichuan Province, and the first hydropower project connected to the grid for power generation in the middle reaches of the Yalong River. Its grid-connected power generation is of great significance to the transformation and upgrading of the hydropower market, optimizing the power structure of the Sichuan power grid, facilitating green and low-carbon development, promoting the economic and social development of power receiving areas and the comprehensive revitalization of the poverty alleviation areas in Liangshan Prefecture.

Among China’s million-kilowatt hydropower projects, Yalongjiang Company took the lead in the construction of Yangfanggou Hydropower Station using the EPC (Design and Construction General Contracting) model, which was contracted by the China Power Construction Hydropower Seventh Bureau·East China Institute Consortium. This is a one-time " The "Bold" model innovation is hailed as the "Second Lubuge Impact" in the industry. In the early stage of China's hydropower construction, the "self-support" management model was mainly adopted, that is, the design and construction of a design institute and engineering bureau under a competent department were designed and constructed, and the construction was transferred to the power plant after completion. Since the "Lubuge Shockwave" (open bidding to introduce competition) in the 1980s, hydropower construction has fully entered the DBB (design-tender-build) construction management model, and the Yalong River Ertan Hydropower Station is one of the representative projects.

In the traditional hydropower construction management model, the design is the first half and the construction is the second half, which virtually "extends" the construction period. The EPC model requires the general contracting team to "run the whole court." In recent years, with the gradual deepening of the power system reform and the increasing cost of hydropower development, Yalong River has adapted to the new development situation and innovatively adopted the EPC model for the Yangfanggou Hydropower Project. This mode deeply integrates design, scientific research, and construction units, integrates resources to the greatest extent, taps the huge potential of strong alliances to the greatest extent, and effectively improves engineering efficiency and benefits. On the "full court" track, the design and construction personnel eat, live and work together, fully integrate the technical advantages of the design unit and the construction unit's field experience and equipment resources, and jointly serve the construction of the project, reducing the number of design and construction units under the traditional model. Failure to communicate effectively and waste of resources and time. It breaks through the traditional mode of organization that has scattered resources, complicated relationships, ambiguous responsibilities, and difficult to control engineering investment, and achieves the goal of "reducing costs, making up for shortcomings, improving quality, and increasing benefits". .

Keywords: clean energy, engineering news

"Take the construction of an underground powerhouse as an example. Generally, the excavation and support of the underground powerhouse of a hydropower station of the same scale takes as long as 30 months. Through the in-depth coordination and integration of design and construction, the construction period for the excavation and support of the underground powerhouse has been advanced by 4 times. Month." The relevant person in charge of the East China Institute gave an example of the advantages that EPC brings to the project. It is said that under the EPC mode, since the start of the power station, the construction safety and quality of the project have achieved "zero accidents". The gates were closed for water storage nearly one year earlier than the contract period, and the units were connected to the grid for power generation 6 months earlier.Editor/Xing Wentao、Design/Zhangtao