Meizhou (Wuhua) Pumped Storage Power Station presents a spectacular picture of "high mountains out of Pinghu, blue waves and peaks". Photo courtesy of the interviewee.
80 kilometers away from Wuhua County, there are two majestic dams standing in the depths of the lush mountains, one high and one low, echoing each other from afar, presenting a spectacular picture of "high mountains out of Pinghu, blue waves and peaks".
As the largest single investment infrastructure project in the history of Meizhou, Meizhou (Wuhua) Pumped Storage Power Station (hereinafter referred to as "Meizhou Storage Power Station") is known as the "super charger" and is the "all-rounder" of energy storage power generation, peak regulation and valley filling, pollution prevention and emission reduction.
With a planned total investment of 12 billion yuan, Mei Storage Power Station is the first pumped storage power station project approved in Guangdong Province. It will be constructed in two phases, and the first phase of 4 units has been completed and put into operation on May 28, 2022The second phase fully entered the mechanical and electrical equipment installation stage at the end of December last year, and is expected to be completed and put into operation by 2025.
At that time, a total of 2.4 million kilowatts of 8 units in the two phases of the Meishu project will be put into operation for power generation, with an annual tax revenue of about 200 million yuan. The Meizhou Project will become the "power granary" of Meizhou in the Guangdong-Hong Kong-Macao Greater Bay Area, and continue to consolidate the power grid in the Greater Bay Area into a world-class power grid in the Greater Bay Area with the largest installed capacity of pumped storage, the strongest grid regulation capacity and the highest proportion of clean energy consumption.
Southern ** reporter Wang Siting.
Fast speed to create the shortest construction period record in China.
How many years will it take to build a pumped storage power station?The Meishu power station gave the fastest answer in China.
On November 30, 2021, Meishu Power Station ushered in an exciting moment - at 24 o'clock on the same day, the first unit of the first phase of Meishu Power Station was put into operation for power generation.
It is understood that it took only 48 months from the start of the main project of the power station to the commissioning of the first unit, which set a new record for the shortest construction period of the main project of the pumped storage power station in China.
As you drive through the tunnel into the belly of the mountain, the deafening roar of machinery contrasts sharply with the quiet landscape outside. When I came to the underground plant, the reporter's location was more than 120 meters underground, and a huge space was presented in front of me, which made people suddenly open up.
Unlike traditional power stations, pumped storage power plants consist of two reservoirs, upper and lower. When the electricity load is low, the electricity will pump the water from the lower reservoir to the upper reservoir for storage, and when the electricity consumption is at its peak, the water will be released from the upper reservoir to the lower reservoir for power generation.
Zhan Caifeng, deputy general manager of Mei Storage Power Station, said that the pumped storage power station is like a power bank of the power grid, and the excess power at the trough of electricity consumption is converted into high-quality electricity at the peak of electricity consumption, and the whole operation process realizes "zero emissions" of fossil energy.
According to reports, the Mei Storage Power Station is the fifth pumped storage power station built by China Southern Power Grid in Guangdong Province. The power station mainly serves the Guangdong power grid, and undertakes the tasks of peak regulation, valley filling, and emergency backup in the power grid, as well as frequency modulation, phase modulation and black start tasks, and is the "stabilizer" and "regulator" of the power grid.
In fact, the Meishu power station faced many difficulties at the beginning of its construction. First, it is difficult to acquire land. Mei Storage Power Station is the pumped storage power station with the largest number of immigrants in China, with as many as 2,320 immigrants. The second is the difficulty of engineering construction. The storage capacity is huge, and the 4 dams adopt 4 different dam types, and the underground plant and water transmission system cavern group are large-scale, with many underground caverns and large vertical shafts. The third is the difficulty of equipment development. The head amplitude of the 400-meter section of the pumped storage unit of the power station is the largest in China.
Thousands of blows are still strong, and the wind blows from east to west, north and south. In the construction of the project, the problems are one after another, testing the mind and courage of all the builders and local cadres.
On the basis of fully soliciting the wishes of the masses, Wuhua County has built two resettlement areas, Meizhu New Village and Huangshi New Village, respectively, in Longcun Town and Shuizhai Town. At the same time, it will solve the employment problem of immigrants after they settle down, and help them realize the transformation from "relocated households" to "relocated rich".
At the same time, the builders of Meishu Power Station rose to the challenge, turned pressure into power, perfectly solved various problems in a short time, and completed the first phase of the project safely, with high quality and efficiency.
The reporter came to the main dam platform in the upper reservoir area and saw that the two huge reservoir areas above and below echoed each other from afar. The water level of the two reservoirs has been submerged in the inlets and outlets, and egrets can occasionally be seen dancing on the water surface or standing on the branches to take a break.
The project hub project is mainly composed of upper reservoir, lower reservoir, the first phase of water transmission and power generation system and other buildings. Among them, the upper reservoir and the lower reservoir have a storage capacity of 43.16 million cubic meters and 49.61 million cubic meters respectively, and the difference between the two reservoirs is about 400 meters, and its total storage capacity ranks second in the country's pumped storage power stations.
At the same time, the Meishu power station is also a typical example of environmental friendliness.
The first phase of the Dianmei storage power station project saves about 17 standard coal per year for the power system090,000 tons, reducing carbon dioxide emissions by about 42820,000 tons, reducing sulfur dioxide and dust emissions by about 0150,000 tons, the direct emission reduction effect is obvious.
New technology: 18 innovative projects have been completed with high quality and efficiency.
From the top of the mountain to the foot of the mountain, from the ground to the underground, every node of the project is a tough battle, and the "plum storage speed" is actually a process of self-pressure and continuous innovation.
Practice has repeatedly told us that key core technologies cannot be bought, bought, or bought. Zhan Caifeng said that Meishu power station adhering to the modern engineering technology as a breakthrough, and strive to achieve independent and controllable key core technologies, the power station took the lead in the implementation of key scientific research projects of the National Energy Administration, 4 sets of switchgear, 18kV bus equipment, thrust tile, automation components using localized equipment, is the first domestic unit to achieve full localization.
This marks that China has mastered the key technology and research and development capabilities of this type of equipment, broken the long-term technical monopoly of foreign businessmen, made up for the last short board of the national production of the main equipment of pumped storage units, and enhanced the core competitiveness of China's pumped storage equipment.
Meishu Power Station has always been based on the actual on-site production, starting from the improvement of equipment reliability, on-site management, and intrinsic safety, and has completed 11 innovative projects based on the research and application of equipment reliability improvement, the construction and application of intelligent auxiliary systems, the optimization of 500kV locking box covers, intelligent KKS coding system, and intelligent identification and signage management system.
In addition, Meishu Power Station has also established 7 new innovative projects, which have effectively improved the reliability of equipment, improved the efficiency and safety of operation and maintenance, and reduced the risk of on-site operation and infrastructure transfer management.
Between the mountains and rivers, innovation surges. Combined with the construction experience of the first phase of the Meizhu power station, the second phase of the Meishu power station also has many innovative highlights in the construction design.
For example, the exhaust shaft uses a raise boring rig to form a 4-meter-diameter shaft at one time, which greatly reduces the construction risk compared with the conventional drilling and blasting methodThe lifting system is used to replace the winch in the construction of the shaft, and the construction safety of the operators is greatly guaranteed.
In the excavation of key caverns such as the main plant and the main transformer room, the deep-hole pre-cracking blasting technology was adopted, and the maximum hole depth reached 16 meters, and the final blasting effect was excellent. The semi-hole rate of key parts such as top arch and rock wall beam reaches 9603% and 9808%, ranking at the leading level in China.
Meishu Power Station has always tightened the string of safety, established a safety production committee and an emergency command center covering all production units and infrastructure units, and signed the "Safety Production Responsibility Letter" at different levels and levels, clarifying the safety supervision responsibilities of all parties. Strengthen the "1+N" operation management and control mechanism, regularly and solidly carry out the investigation and management of potential safety hazards, and effectively improve the level of safety risk management.
The power station also advocates that safety management should be combined with heart and affection, that is, to achieve "two diligence and one in place" (leg diligence, mouth diligence, and measures in place), and at least once a day to each working face inspection;Treat the on-site construction personnel as their own brothers and sisters.
On-site construction management should be intrinsically safe and resolutely adhere to the red line of safety management. For major operations such as edge holes, lifting and hoisting, on-site temporary electricity, traffic safety, etc., we cannot let go of any loopholes, do not lose any blind spots, and do not leave any hidden dangers. Li Haifu, safety director of the project department of the 14th Bureau, said.
The second phase of stable development has entered the stage of mechanical and electrical equipment installation.
According to the data, in 2023, the unit will be started 5,196 times, with a cumulative annual power generation of 1.7 billion kWh and a pumping electricity consumption of 212.5 billion kWh, and the annual operating hours of the four units are 16,857 hours.
Since the first phase of the Meishu Power Station project was put into operation, the unit has been running stably and the production indicators are excellent. The economic and social benefits of the power station have gradually emerged, and it has gradually become a benchmark for the construction and operation of pumped storage power stations in China.
At present, the second phase of the project is in full swing, and the underground cavern has been basically excavated and has fully entered the stage of concrete construction and mechanical and electrical installation. At present, the first section of the tail water elbow pipe and the lead steel pipe have been hoisted in place, and the main plant and tail water lining concrete have been officially poured, and the overall construction progress is controllable.
Since the second phase of the Meishu Power Station has started construction in September 2022, the shortest distance between the two phases of the plant is only 170 meters.
In view of this situation, a special blasting vibration test plan was formulated, testing equipment was installed in key parts, and the blasting parameters were dynamically adjusted according to the detection vibration data. The second phase of the pre-cracking blasting test was carried out under the shutdown state, and the inspection of the first phase of the equipment was strengthened.
Beyond the mountains, there are clear water and blue sky, deep mountains and valleys;Inside the mountain, there are huge caves and huge factories.
According to reports, the second phase of the Meishu power station has an investment of about 4 billion yuan, and it is planned that all four units will be put into operation for power generation in 2025. This is the first pumped storage project in the Guangdong-Hong Kong-Macao Greater Bay Area during the 14th Five-Year Plan period, and one of the major projects of the "Millions and Millions Project", which is of great significance for the province, the city and the county to achieve excellent results.
At that time, the eight units of the two phases of the project with a total of 2.4 million kilowatts will be put into operation, which will become the "power granary" of Meizhou in the Guangdong-Hong Kong-Macao Greater Bay Area, and further consolidate the power grid in the Greater Bay Area to become a world-class power grid in the Greater Bay Area with the largest installed capacity of pumped storage, the strongest power grid regulation capacity and the highest proportion of clean energy consumption.
As a clean energy source, the Meishu power station is expected to generate 35 percent of electricity annually0.4 billion kilowatt hours, which can save about 105 percent of the system's standard coal every year120,000 tons, which can reduce carbon dioxide emissions by 261 per year90,000 tons, sulfur dioxide emissions 790,000 tons, the emission reduction effect is equivalent to nearly 10The purification effect of 70,000 acres of forests will make a strong contribution to promoting the green and low-carbon transformation of Guangdong's economy and society.
Industry experts said that the Mei storage power station is one of the few pumped storage power stations in China that can achieve weekly regulation. After the power station is fully operational, it will greatly enhance the power grid regulation capacity of the Guangdong-Hong Kong-Macao Greater Bay Area, and promote the construction of Guangdong into a pioneer and demonstration area for green and low-carbon development in the country.
The night in the mountains is exceptionally quiet, the underground caverns of the Meishu Power Station are still brightly lit, and the builders are working day and night to speed up the full operation of the Meishu Power Station.