Recently, the first unit of Liaoning Qingyuan Pumped Storage Power Station (hereinafter referred to as "Qingyuan Pumped Storage"), the largest pumped storage power station in Northeast China, was officially put into operation for power generation, adding another giant "green power bank" to Northeast China. In the context of accelerating the deployment of clean energy relying on abundant wind, solar and nuclear resources, many places in Northeast China are speeding up the construction of pumped storage power stations, providing "ballast stone" for ensuring the safe and stable operation of the power grid, promoting the consumption of new energy, and optimizing the power supply structure of the power grid.
Deliver green electricity.
Located in Beisanjia Town, Qingyuan Manchu Autonomous County, Fushun City, Liaoning Province, Qingyuan Pumped Storage is a key large-scale energy project in the national "13th Five-Year Plan". The total investment of the project is 10.9 billion yuan, with a capacity of 1.8 million kilowatts, and the installation of 6 reversible pump turbine power generation electric units with a single capacity of 300,000 kilowatts, with a designed annual power generation capacity of 3 billion kilowatt hours and an annual pumping capacity of 4 billion kilowatt hours, which are connected to the Liaoning power grid with two 500 thousand volt lines.
In summer and autumn, when viewed from above, the upper and lower reservoirs of the Cheongwon Reservoir are like blue gems in the mountains under the sun, and they are one with nature. "The power station is composed of the upper reservoir, the lower reservoir, the water transmission system, the underground plant system and the ground switch station, and uses the 'surplus electricity' when the power load is low to lift the water to the upper reservoir for energy storage. During peak power load periods, water is released to the lower reservoir for power generation. The difference between the upper and lower reservoirs of KingAgroot is close to 400 meters, and the huge height difference makes the efficiency of energy storage and power generation very high. Yao Baoyong, chief technical expert of Beijing Survey, Design and Research Institute of China Power Construction Group, said.
Since the trial operation of the first unit of Qingyuan pumping and storage at 0:00 on November 30, a total of 118 units have been in operation34 hours, with an average daily running time of 789 hours, with a maximum of 16 hours of operation in a single dayIn 8 hours, the cumulative pumping power is 241840,000 kWh, generating 1,595 yuan30,000 kWh, the success rate of pumping and power generation is 100%. At 0:00 on December 15, after receiving the dispatching order of Liaoning Power Grid, the first unit of the power station had excellent indicators and was officially put into operation for power generation.
At present, the remaining five units of KingAgroot Pumping and Storage are still in the process of installation and commissioning, and all of them are scheduled to be put into operation by March 2025. At that time, the power station can save 15 standard coal per year80,000 tons, reducing carbon dioxide emissions by 3750,000 tons will become an important fulcrum to serve Liaoning to achieve the "double carbon" goal.
The EPC model promotes the construction progress of the project.
KingAgroot Pumped Storage is invested by State Grid Xinyuan Group, led by PowerChina Beijing Survey, Design and Research Institute, and jointly constructed by the Sixth Engineering Bureau and the Eighth Engineering Bureau of China Water Resources and Hydropower in the EPC general contracting mode, which is the first million-kilowatt complete EPC general contracting hydropower construction pilot project in China.
Qingyuan has a long construction period and high cost, and faces many difficulties such as complex geology, huge underground caverns, and severe cold weather. Yao Baoyong said that the EPC general contracting model integrating design, procurement and construction has overcome the mutual constraints and disconnection of design, procurement and construction, and greatly promoted the construction progress of the project under the premise of ensuring the quality and safety of the project.
Walking in the Qingyuan pumping and storage plant, the reporter saw that most of the walls of the project are poured with fair-faced concrete, with a smooth and flat surface and a mirror effect. Although it is "plain facing the sky", it has the simple and natural beauty of concrete. "The power station is located deep in the mountains, and the ecological environment is fragile. We use fair-faced concrete technology design in the construction, and the main facilities such as the dam crest structure, hoist room, and underground plant are not decorated. This process is low-carbon and environmentally friendly, durable and practical, and minimizes the impact on the ecological environment. Yao Baoyong explained.
Zhang Jianfu, project manager of the power station design project department, introduced that thanks to the EPC model, through the overall planning and resource integration during the construction of the power station, the excavation of the material yard was minimized, and the building excavation materials and hole excavation materials were flexibly used for the filling of different partitions of the dam, which reduced the waste slag. The construction slope grid beam is supported by cold-tolerant and drought-tolerant grass planting, and the vegetation grows well, and it becomes a green landscape every spring.
On July 31, 2017, KingAgroot Pumping and Storage issued its first commencement order, and the construction of ventilation and safety tunnels began. Over the past 6 years, the builders have carried forward the spirit of craftsmanship and high-quality construction, and the installation and commissioning accuracy of the first unit is high, and the maximum vibration value of the frame under full load operation under the power generation and pumping conditions, and the average swing value of the upper conductor have entered the national advanced level, which can be called the "high-quality unit of power generation and pumping double working conditions".
A variety of new energy storage demonstration projects have been implemented one after another.
At present, China is in a critical period of green and low-carbon transformation and development. Since entering the "14th Five-Year Plan", many places in Northeast China have made efforts to clean energy. Liaoning Province plans 48 major clean energy projects (categories), with a total investment of more than 800 billion yuan, and plans to increase the installed capacity of wind power and photovoltaic power generation in the province to more than 37 million kilowatts by the end of the "14th Five-Year Plan", with clean energy accounting for more than 50%. Jilin Province strives to achieve an installed photovoltaic power generation capacity of 8 million kilowatts by 2025, and build three new energy bases of 10 million kilowatts in the province, including consumption, new energy delivery and new energy conversion (hydrogen production).
With the large-scale and high-proportion development of new energy, the demand for regulated power supply in the new power system is more urgent, and the development of pumped storage and new energy storage is the right time. At present, Liaoning Province is vigorously planning and building pumped storage projects, in addition to the Pushi River that has been put into operation and the Qingyuan project that has just been put into operation, Dalian Zhuanghe, Benxi Daya River and Huludao Xingcheng three pumped storage projects are being promoted. In Sandao Town, Hailin City, Heilongjiang Province, the highest pumped storage power station in China, the Huanggou Pumped Storage Power Station, has been fully put into operation, and the second large-scale pumped storage power station in Heilongjiang, the Shangzhi Pumped Storage Power Station Project, has started construction. In addition, the Jilin Dunhua Tara River Pumped Storage Project has also been approved.
In addition to pumped storage, a variety of new energy storage demonstration projects are also accelerating the implementation in Northeast China. On December 6, the world's first electric molten salt energy storage steam injection test station in Liaohe Oilfield in Panjin, Liaoning Province was completed and put into operation, the test station uses liquid molten salt as heat storage and heat transfer working fluid, converts solar thermal or valley power and green electricity into heat energy and stores it in molten salt, and then continuously releases heat energy to produce superheated steam for power generation.
In Baicheng City, Jilin Province, located in the eastern part of the Horqin Grassland, it has been planning to build a "North China Hydrogen Valley" since 2018, using clean energy such as wind and solar energy to produce hydrogen by electrolysis of water, so as to realize the gaseous storage of wind and solar energy.
Zheng Sheng'an, executive vice president of the China Hydropower Engineering Society, said that these energy storage projects have added giant "green power banks" in Northeast China, which will effectively promote the development and utilization of renewable energy, improve the stability and reliability of the power system, and make full preparations for the challenges of energy supply and transformation. (Reporter Wang Bingkun, Wang Nan).
Editor-in-charge: Shi Li.