The world's first 300-megawatt compressed air energy storage (CAES) station in Yingcheng, Central China's Hubei province, was successfully connected to grid on April 9.
The world's first 300-megawatt compressed air energy storage (CAES) station in Yingcheng, Central China's Hubei province, is successfully connected to grid on April 9. [Photo/sasac.gov.cn]
It has achieved three world records in terms of single-unit power, energy storage scale, and conversion efficiency. Additionally, it has established six industry benchmarks, dozens of international firsts, and marked a global breakthrough.
The world's first 300-megawatt compressed air energy storage (CAES) station utilizes the self-developed CAES system by China Energy Engineering Corporation Limited. [Photo/sasac.gov.cn]
With a total investment of approximately 1.95 billion yuan, the station boasts a single-unit power capacity of 300 megawatts and an energy storage capacity of 1,500 megawatt-hours, achieving a system conversion efficiency of about 70 percent.
"Compressed air energy storage", alongside pumped-storage hydroelectricity, is one of the most mature physical energy storage technologies currently available. It will serve for constructing a new energy system and developing a new power system in China, as well as a key direction for cultivating strategic emerging industries.
During the construction, the CEEC, together with various construction partners, achieved 100 percent localization of core technical equipment, overcoming many challenges, including process system integration, underground gas storage construction, and key equipment research and development.
Dubbed as a "super power bank", the station is expected to reach a gas storage capacity of 1.9 billion cubic meters, and generate approximately 500 million kilowatt-hours of electricity annually.
The project was invested by China Energy Engineering Group Science and Technology Development Co Ltd (ENERGY CHINA STDC) and State Grid Hubei Comprehensive Energy Service Co Ltd, and co-constructed by CEEC Hunan Power Construction Co Ltd and Southern Construction & Investment Co Ltd.
China has made breakthroughs on compressed air energy storage, as the world''s largest of such power station has achieved its first grid connection and power generation in China''s Shandong province.
With a total investment of 1.496 billion yuan ($206 million), its rated design efficiency is 72.1 percent, meaning that it can achieve continuous discharge for six hours, generating approximately 600 million kWh per year.
This new type of power station was independently developed by the Institute of Engineering Thermophysics under the Chinese Academy of Sciences and Zhongchu Guoneng (Beijing) Technology Co Ltd.
The national pilot demonstration project for storage of compressed air energy at Jintan salt cavern was officially put into commercial operation in Changzhou, East China's Jiangsu Province, on May 26.
The only national demonstration project and the first commercial power plant project in the compressed air energy storage field,the plant wasjointly constructed by China National Salt Industry GroupCo., Ltd.(CNSIC), China Huaneng Group Co., Ltd.(China Huaneng)and Tsinghua University.
Completion and operation of the first phase of the project was a breakthrough in China's salt cavern compressed air energy storage technology and a milestone ofcommercialization ofnew-typeenergy storage technologyin the country.
CNSICwas responsible for construction of the underground gas storageareabased on advanced cavity construction and injection-production technologies. China Huaneng shouldered construction, adjustment, operation and maintenance work by giving full play of its electric power advantage. The non-supplementary fired compressed air energy storage technology with proprietary intellectual property rightswas developed by Tsinghua University.
It's worth noting that many other SOEs such asState GridCorporationof China, Dongfang ElectricCorporation, Harbin ElectricCorporation, Shanghai ElectricGroup, Shenyang Blower Works Group Corporation, China EnergyEngineering Corporation Limited, Power Construction Corporation of China, China National Petroleum Corporation, China Petrochemical Corporation and Zhejiang Construction Investment Group Co., Ltd. also contributed to theconstruction, making the project an exampleof cross-border cooperation and coordinated innovation.
Salt cavern compressed air energy storage refers to a method for compressingair into the huge cavity formed by water-solution-based salt mining during low electricitydemand periods,andreleasingair to drive an air turbine togenerate electricity whenit isneeded.
It is estimated that the Jintan salt cavern compressed air energy storageproject will have a power output equaling thatproduced by burning about 30,000 metric tons of standard coal, eliminating 60,800 tons of carbon dioxide annually.
As the world's first non-supplementary firedcompressed air energy storage power station, the project has applied for more than 100 patents and established a technologicalsystem with completelyindependent intellectual property rights.
China's firstcoding standard and grid-connected standard in the field of compressed air energy storagewerealso released during the project, and the country's first national standard and industrialstandard inthe field havealso been filed, forming a standard system of compressed air energy storage.
Last but notleast, a group of professional talents in compressed air energy storage with scientific research and innovation ability and engineering practice experiencehas also been cultivated, laying a foundation for development of the industry.
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