21 billion! Construction of two pumped storage power stations starts in Gansu Province
Release time：2024-09-02click：0
According to reports, the construction of two pumped storage power stations in Zhangye Pandaoshan and Sunan Imperial City has started recently. It is reported that the two power stations under construction this time have an installed capacity of 1.4 million kilowatts, a designed annual power generation capacity of 1.637 billion KWh, and an annual water pumping capacity of 2.183 billion KWh. The planned investment is about 21 billion yuan, invested by Power China. After the power station is completed, it can generate tax revenue of 300 million yuan and create more than 3,000 jobs every year.
Pumped hydro energy storage projects appear frequently
Due to the impact of the epidemic, my country’s economic growth this year relies on infrastructure. Since October alone, pumped storage-related projects have emerged one after another.
On October 27, Baoting Li and Miao Autonomous County signed a cooperation agreement on a pumped hydro energy storage project with China Power Construction Hainan Construction Investment Co., Ltd. The total planned investment of the project is 7 billion yuan.
From October 26th to 27th, the pre-feasibility study report of the Sizhoushan pumped storage project in Guiyang, Hunan was approved. The project has a total installed capacity of 1,200MW and plans to install 4 units with a single capacity of 300MW. Single-stage mixed flow reversible water pump turbine unit.
On October 26, the Jiangsu Nanjing Yeshan pumped storage power station project was officially signed. The project is initially planned to have an installed capacity of 800,000 kilowatts and an annual power generation of 1.34 billion KWh.
From October 23 to 26, the pre-feasibility study report of the pumped storage power station project in Zhangxian County, Gansu Province was reviewed and approved. The total planned investment of the project is 9.331 billion yuan, with an initial planned installed capacity of 1.4 million kilowatts. After the project is completed, it is initially estimated that it will save approximately 751,300 tons of standard coal and reduce carbon emissions by 259,800 tons per year.
From October 22 to 23, the feasibility study report of Guiyang pumped storage power station in Guizhou was reviewed and passed. The total installed capacity of the project is 1,500MW.
On October 21, the water transmission and power generation system project of Shanxi Yuanqu Pumped Storage Power Station started construction. The power station of this project is designed to generate an annual power generation of 1.2 billion KWh and an annual pumping power of 1.6 billion KWh.
Analysis of the current situation of pumped hydro energy storage in my country
Pumped hydro energy storage is of special significance to the realization of my country’s “double carbon” goal. Due to limited oil and gas resources in my country, , unable to transform from high carbon to low carbon like other developed countries. Therefore, our country must have a large amount of pumped hydropower storage to accommodate more wind and solar power generation and achieve "carbon neutrality" in electricity.
At the same time, pumped hydro storage is currently the most mature large-scale energy storage technology. According to relevant statistics, as of the end of last year, among the cumulative installed capacity of power energy storage projects in operation in my country, pumped hydro storage accounted for 86.3% of the cumulative installed capacity. %, far exceeding other energy storage types.
In September last year, the National Energy Administration issued the "Medium- and Long-term Development Plan for Pumped Hydropower Storage (2021-2035)" which clarified that by 2025, the total scale of pumped hydropower storage would be 62 million kilowatts. Above; by 2030, the total scale of production will be about 120 million kilowatts.
From a structural point of view, a pumped storage power station consists of upper and lower reservoirs, water transmission and power generation systems. When the power load is low, the lower reservoir is pumped to the upper reservoir. When the power load is peak, the lower reservoir is pumped to the upper reservoir. , release water from the upper reservoir to generate electricity and provide power for the power grid. The current efficiency of pumped storage power stations is about 75%, that is, the ratio of power generation to power consumption is three-quarters.
From the perspective of the industrial chain, the pumped storage industry chain can be roughly divided into three parts: investment and operation, general contracting, and equipment. Among them, the relevant investors include State Grid Xinyuan, China Southern Power Grid, Three Gorges Corporation, Huadian Group, etc., accounting for 63.3%, 22.9%, 4.7%, and 2.7% respectively.
From the perspective of energy storage timeliness, pumped hydro storage is a long-term energy storage technology with long continuous energy storage time and large installed capacity. In terms of service life, the dam body of a pumped hydropower station can be used for more than decades, and the life of motor-related equipment can also reach about 50 years. The disadvantages of pumped storage are the long construction period, high investment, terrain conditions and high site selection requirements.
From the perspective of profitability, in 2021, the number of pumped storage power stations operated by State Grid New Energy will be 29,000 times/year, and the on-grid power generation will be 26.3 billion KWh/year. The company’s gross Profit 31.46%. In operating pumped storage power stations, the income per unit of electricity generated from the grid-connected electricity is about 0.6 yuan, the unit cost of electricity is about 0.4 yuan, and the net profit per unit of electricity is about 0.1 yuan.
