On March 17, Xin Baoan, chairman and party secretary of the State Grid Corporation of China, announced the commencement of two pumped storage power station projects in Taishun, Zhejiang and Fengxin, Jiangxi. The construction of Zhejiang Taishun and Jiangxi Fengxin pumped storage power stations is the first batch of pumped storage power stations started by the State Grid Corporation of China this year.
The total investment of Zhejiang Taishun and Jiangxi Fengxin pumped storage power stations is 14.773 billion yuan, with a total installed capacity of 2.4 million KW. It is planned to be completed and put into operation in 2030. Among them, Zhejiang Taishun pumped storage power station is located in Taishun County, Wenzhou City, Zhejiang Province, with a total installed capacity of 1.2 million KW, four units with a single unit capacity of 300000 kW are installed, and two 500 kV lines are connected to Zhejiang power grid, with a total investment of 7.134 billion yuan; Jiangxi Fengxin pumped storage power station is located in Fengxin County, Yichun City, Jiangxi Province, with a total installed capacity of 1.2 million KW. Four units with a single unit capacity of 300000 kW are installed and connected to Jiangxi power grid with two 500 kV lines. The total investment of the project is 7.639 billion yuan.
Pumped storage is the most mature energy storage mode with the most mature technology, the best economy and the most large-scale development conditions. It is a green, low-carbon, clean and flexible regulated power supply for power system. Pumped storage has the functions of peak shaving, frequency modulation, phase modulation, energy storage, system standby and black start, as well as the technical and economic advantages of large capacity, many working conditions, fast speed, high reliability and good economy. It plays a basic role in ensuring the safety of large power grid, promoting the consumption of new energy and improving the performance of the whole system. It is an important part of energy Internet. Accelerating the development of pumped storage is an urgent requirement for the construction of a new power system, an important support to ensure the safe and stable operation of the power system, and an important guarantee for the large-scale development of renewable energy.
Zhejiang is a province with large power demand. In 2021, the maximum power load has exceeded 100 million KW, the peak valley difference has exceeded 35 million KW, and the maximum external power received is 35.7 million KW. During the "14th five year plan" period, the local wind power and photovoltaic power generation in Zhejiang will develop rapidly, the input of clean power outside the area will continue to increase, the industrial structure adjustment will lead to the further widening of the load peak valley difference, and the huge demand for power grid regulation. The construction of Taishun power station will effectively improve the regulation capacity of Zhejiang power grid, enhance the emergency support capacity of multi DC incoming power grid, support the development of new energy, ensure the safe and stable operation of power grid, escort Zhejiang's energy transformation, and is of great significance to help Zhejiang build a demonstration area of common prosperity. Jiangxi is a demonstration province of China's ecological civilization. New energy is developing very rapidly, accounting for nearly one-third of the installed capacity. With the further development of new energy and the increase of external power in the future, power grid peak shaving and power supply guarantee will face great challenges. Fengxin hydropower station has a superior geographical location and is close to the load center. After completion, it will effectively enhance the regulation capacity of Jiangxi power grid, improve the system security and operation economy, promote the consumption of clean energy, and play an important role in accelerating the construction of a national model area for ecological civilization in Jiangxi.
Pumped storage power station has the advantages of large investment, long construction cycle, strong driving force and significant medium and long-term economic benefits. It can effectively drive the development of upstream and downstream industries such as power supply, electrical equipment, energy consumption equipment and raw materials, promote the transformation and upgrading of equipment manufacturing industry, improve the stability and modernization level of industrial chain supply chain, and play a very important role in stabilizing investment, ensuring employment and benefiting people's livelihood. According to the investment estimation, the construction of pumped storage power stations in Taishun, Zhejiang and Fengxin, Jiangxi can improve the local transportation and living infrastructure, drive the development of investment and related industries, drive the local GDP to exceed 30 billion yuan, increase the local fiscal revenue by about 120 million yuan on average every year, and provide more than 8000 jobs of all kinds; During the operation period, the local fiscal revenue can be steadily increased by about 220 million yuan every year, and the economic and social benefits are very significant.
Pumped storage power station can replace coal-fired power units with a certain capacity, improve the overall economy of operating units in the network and improve the scale of new energy. Nuclear power, wind power and photovoltaic in Zhejiang Province are relatively large-scale and commercially developed energy sources in clean energy, which need to be optimized with other power sources. Jiangxi's power supply structure is dominated by thermal power. At the same time, it vigorously develops clean energy such as wind power and photovoltaic, and receives a large number of external power in the area. There is an urgent demand for high-quality regulated power supply. Pumped storage power station has the ability to rapidly increase or decrease output and flexible dispatching. It can cooperate with nuclear power operation, stabilize the volatility of wind power and photovoltaic, and improve the operation mode of coal power. It is an important part of "multi energy complementarity" of nuclear power, thermal power, hydropower, wind power, photoelectric and energy storage. After the completion of Zhejiang Taishun and Jiangxi Fengxin pumped storage power stations, it can reduce 220000 tons of raw coal consumption, 450000 tons of carbon dioxide and 3000 tons of sulfur dioxide every year.
In addition, the pumped storage unit has convenient start and stop and rapid response. It is a technically mature, economical and reasonable system standby power supply. It plays an important role in stabilizing the system frequency, providing accident support and improving the stability of the power system. Taking 1.2 million KW pumped storage as an example, it can change from full load pumping to full load power generation within 5 minutes, providing 2.4 million kw of power support capacity. China is vigorously promoting the construction of new energy supply and consumption system. The provision of pumped storage power stations with sufficient capacity in the power system can effectively improve the comprehensive defense capacity of the large power grid and ensure the safe and stable operation of the power grid.
China has the largest installed capacity of pumped storage power stations in the world. A number of large pumped storage power stations have been built, including Panjiakou, the Ming Tombs, Tianhuangping, Xianju and Jixi. By the end of 2021, the scale of pumped storage power stations in operation and under construction in the operation area of State Grid Corporation of China had reached 26.31 million KW and 46.43 million KW respectively; The total installed capacity of wind power and Cecep Solar Energy Co.Ltd(000591) power generation connected to the State Grid is 540 million KW, which is the largest and fastest-growing power grid in the world. With the in-depth promotion of the "double carbon" goal, new energy such as wind power and Cecep Solar Energy Co.Ltd(000591) power generation will develop rapidly, which inevitably requires the synchronous enhancement of system regulation capacity and guarantee means. According to the medium and long term development plan of pumped storage (20212035), by 2025, the total scale of pumped storage put into operation in China will be more than 62 million KW; By 2030, the total scale of production will be about 120 million KW. During the 14th Five Year Plan period, the pumped storage power station in the operation area of the State Grid Corporation of China will usher in the construction peak. It is expected that the newly put into operation installed capacity will exceed 27 million KW, and the total scale of operation will reach 50 million KW by 2025. Accelerating the construction of pumped storage power stations will have more strategic significance and overall impact in serving the "double carbon" goal, building a new power system and ensuring energy and power security.
