Changlongshan password: water, electricity, peak, valley, green kinetic energy!

Yu Village, Tianhuang Ping Town, Anji County, Zhejiang Province, is like emeralds, and the bamboo sea is stretched. Under the guidance of the "two mountains" concept, Yucun people vigorously repaired the ecological environment for more than ten years, developed the leisure tourism economy, and built a vivid sample for the construction of beautiful Chinese ecological civilization. On Changlong Mountain, less than 4 kilometers southeast of Yucun, a group of Three Gorges people, after more than ten years of preparation, construction for more than six years, a large -scale pump storage power station with a total installed capacity of 2.1 million kilowatts. The power station uses green water to make electrical energy savings medium, with the help of green mountains to form a conversion of potential energy and electricity, to achieve adjustment of the power grid, serve the social and economic development of East China with its strong green benefits, and carry out green in the most intuitive and most vivid way. The Three Gorges practice of Shuiqingshan.

On Changlong Mountain, the achievement of the Three Gorges of the Three Gorges of the 40s

Changlongshan Power Station up the reservoir. Photography: Cui Xubo

Anji, located in the northern part of Zhejiang and the hinterland of the Yangtze River Delta. It transitions from the Tianmu Mountains to the Taihu Plain. It is an excellent condition for building a water storage power station.

"Among the three provinces and cities of Jiangsu, Zhejiang and Shanghai, Jiangsu and Shanghai are mainly plains, which is not suitable for large -scale development of pumping storage power stations. The district provides geographical conditions for the formation of the upper and lower reservoirs for the formation of the upper and lower reservoirs. "Liu Guoping, the general manager of the Three Gorges Group Zhejiang Group Zhejiang Changlongshan Pumping Company (hereinafter referred to as Changlongshan Company), said," In addition to Shanghai, Hangzhou, Nanjing, etc. The central city of the power load is near. As early as the 1970s, the state considered planning to plan water storage power stations in Anji. "

In 1979, the East China Investigation and Design Research Institute believed that Anji Tianhuangping was suitable for establishing pumping storage power stations. In the middle of the 1980s, the Tianhuangping Pumping Power Power Station was approved. In 1994, the power station officially started. By December 2000, all crews were put into production and power generation.

The successful construction and operation of the Asian single factory installation capacity of that year, and the growing demand for the growth of the power grid, allowed Tianhuang Ping Second Water Storage Power Station Project (referred to as the Tianji project, that is, today Changlong Mountain pumping water storage energy energy storage capacity Power station) Gradually float on the water.

Changlongshan and Tianhuaping pumping water storage power station up and down reservoirs

Not only this, Liu Guoping believes that this site is still a "savings" address: "The east and west sides of the reservoir on the Changlong Mountain is natural mountain ridge. Just built a dam on both sides of the north and south. The "reservoir basin ', than the Tianding Ping Shang Reservoir, can only be repaired on the top of the mountain to" enclosure' into 'library pots' to greatly save the amount of building materials and engineering. You only need to repair a river dam to form a reservoir with a total reservoir of 16.11 million cubic meters. "

On October 29, 2015, the Changlongshan pumping power station was approved by the Zhejiang Provincial Development and Reform Commission. On February 15, 2017, the main project was officially started. The builder overcomes unfavorable conditions such as rain and mist weather, geological defects and the impact of the new crown epidemic, and changes the Changlong Mountain pumping power station from a blueprint step by step to reality. By the eve of the "July 1st" this year, the Changlongshan Power Station realized all units to put into production and power generation.

Tuna "scenery", Changlong Mountain built a giant "regulator"

The main factory building of Changlongshan Power Station. Photography: Cui Xubo

On June 30, 2022, all units of the Changlongshan pumping power station were put into production and power generation. What role will this installation capacity of 2.1 million kilowatts operate on the grid -connected power station?

The production and use of electrical energy are synchronized. How much load is needed in society, and the power plant will synchronize the corresponding contribution. Social electricity loads will form a peak and trough in different times and regions. At this time, the power plant is required to adjust the power of the motor to maintain the power generation and electricity balance, and maintain the system voltage and frequency stability.

"It is not easy to maintain this stability, and the electric power of the basic load energy of thermal power, nuclear power and other basic load energy consumption is long. . "Yao Liang, director of the engineering management department of Changlongshan Company, said," The Changlongshan pumping units can realize the transition from a shutdown state within 3 minutes to power generation, and from the water pumping condition to the power generation condition within 8 minutes, the response response quickly. And through the conversion of water pumping and power generation status, the power station can achieve twice the total capacity of the power grid, that is, 4.2 million kilowatts, and the adjustment capacity is very strong. These will effectively maintain the power grid sending and balance, and ensure the stability of the power system. "

The pumping storage power station has adjusted the power grid in replacing traditional energy, allowing the basic load energy of thermal power and nuclear power to avoid frequent start -stop and contribution changes to achieve better power consumption efficiency. "This can effectively reduce fuel consumption when driving to avoid frequent start -stop and acceleration when driving a car." Yao Liang explained the image.

The Changlong Mountain pumping power station built in the new period is of great significance to build a new power system with new energy as the main body as the main body.

"The" Fourteenth Five -Year Plan "period in my country will accelerate the construction of a new type of power system with new energy as the main body. The technology of pumping water storage power stations is the most mature, the best economy, and the most large -scale development conditions. "Lei Mingshan, chairman and party secretary of the Three Gorges Group, said.

"New energy such as wind power and solar energy is affected by natural conditions. The time and power of power and power are strong, and it is difficult to match the demand of the grid in real time." Liu Guoping further explained that "and" and "pumping power storage power stations can put these scattered power" zero deposits' on the top. Reservoir, when the power grid is needed, then "take out ', so that the new energy of wind power and solar energy to stabilize the output as needed like traditional energy, which becomes a high -quality power supply." In short, after all the Changlongshan Power Station is put into production, 2.435 billion kWh per year will participate Taking peak adjustments, the corresponding pumping power consumption is involved in the valley reclamation, coupled with frequency adjustment, phase adjustment, accident reserve, and adjustment of new energy regulation, which is equivalent to installing a huge "charging treasure" and "regulator" for East China Power Grid. ", Will effectively promote the realization of goals such as cleaning and low carbon, secure, reliable, flexible, and efficient economy, and help build a new power system with new energy as the main body.

Real tempering, Three Gorges strong pumping forces

Changlongshan Power Station down the reservoir. Photography: Cui Xu Bo

"Changlongshan pumping power storage power station is the first pump storage project investment, construction, and operational experience in the Three Gorges Group. During the project implementation process, we will be applied to the experience accumulated in the three gorgeous projects and the development of hydropower development in the jinsha River to In the construction of power storage power stations, the key core technologies of the construction of power stations have been mastered, the problems in the construction of power stations have been cracked, and the construction management talents of the pumping are cultivated. "Liu Guoping said.

Changlong Mountain pumping water storage power station has the largest power generation water head of 756 meters, ranking first in the world in pumping water storage power stations. Because the water head is high, the single -segment diameter diagonal well in the upper and lower reservoir is 435 meters, ranking first in China.

"The oblique well is not only long, but also steep. The rocks that need to be excavated are also very hard." Li Gen, engineer of the engineering management department of Changlongshan Company, said, "The slope of the oblique well is 58 degrees. About 120 floors; the average strength of the surrounding rock's pressure is 170 MPa, which is equivalent to undergoing a pressure of 17,000 tons per square meter, and excavation is like digging on the steel plate. "

Such a long -sized well construction, if the tradition is used from bottom to top, while hugging while excavating, after excavation for more than 200 meters, the safety risks such as hypoxia and slag are extremely risks.

After repeated investigation and research, the builders of Changlongshan creatively introduced a "directional drilling hole+anti -well diamond and anti -pull" excavation technology that matured in the mining field. This technology has no mature experience to learn from the 400 -meter -level long -inclined well excavation of the pumping storage power station. The builder touched the stone to cross the river. By strengthening the process control, he dug and tilted, and finally realized 6 oblique wells accurately and safe.

Under the condition of ultra -high water heads, in order to hold the ultra -strong water pressure, the lower half of the water diversion system "puts" a "armor" -the stress steel tube lining in the cave, with a maximum diameter of 5 meters. The lower sloping well is 415 meters and the inclination angle is 58 degrees, while the maximum weight of the steel pipe installation pipeline is 28 tons, which is equivalent to the weight of the 14 -foot container. This is equivalent to sliding and welding giant heavyweight steels on a long and steep slope, and the construction difficulty is unprecedented.

The builder's innovative process method has overcome the high -strength steel welding problem, and adopts the overall roll -up process of high -strength steel pressure steel pipes. Two steel plate rolls are welded into a cylinder into a steel plate rolled into a cylinder to reduce one welding seam , Saving time and saving materials, can also ensure quality. In the end, the builders created an industry record with a 60 -meter/22 -day cycle of the stress steel pipe installation and concrete reclaiming loop. It took 466 days to complete the manufacturing installation and concrete backfill of the stress steel pipe of the No. 1 diversion system. Rate 99.98%.

Overlooking Changlongshan Power Station down the reservoir. Photography: Cui Xubo

In recent years, the Three Gorges Group has deployed in many fields such as water energy, wind energy, and solar energy, and participated in the development of large -scale new energy delivery bases in key areas. The successful construction of Changlongshan Power Power Station will greatly enhance the comprehensive strength of the Three Gorges Group in energy storage business, and then help the group's high -quality development of renewable energy business. At present, the Three Gorges Group is promoting a batch of service system capabilities, excellent technical and economic indicators, and large development role in 26 provinces, autonomous regions and municipalities across the country. After these projects have been completed and put into operation, they will become a strong kinetic energy to ensure China's new energy system, and play an important role in the process of achieving carbon peaks, carbon neutrality and targets.

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