The construction of the second phase of Huaneng Jintan 2×350 MW salt cavern compressed air energy storage power plant, the world’s largest of its kind, has reached a milestone
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Recently, the No. 2 unit of the second phase of the Huaneng Jintan 2×350 MW salt cavern compressed air energy storage power generation project, constructed by Shandong Electric Power Construction Company No. 1, reached several milestone stages: the completion of the main building structure and cessation of water use, successful power supply to the DCS system on the first attempt, and the installation of the first compressor motor. The Huaneng Jintan project team from Shandong Electric Power Construction Company No.1 made full use of the optimal construction period, coordinated various resources in a scientific manner, optimized construction procedures and technical plans based on the project planning and execution as well as the arrival of equipment, strengthened safety, quality, and schedule management throughout the process, ensured proper control over construction steps and quality inspections, thereby facilitating the high-quality completion of the project. At present, 80% of the transformer installation for Unit 2 of this project has been completed, and more than half of the heat exchangers have been installed. Major equipment modules such as air compression units and turbine generators have also been brought in and placed in place, with on-site installation work now in full swing, thus accelerating the construction of this world’s largest salt-cave compressed air energy storage power station. It is reported that the second phase of Huaneng Jintan salt cavern compressed air energy storage power generation project plans to install two 350-megawatt non-reburning compressed air energy storage units, with a total volume of 1.2 million cubic meters for storing air in the salt caverns. Compared to traditional compressed air energy storage systems, this energy storage unit features a key innovation in the form of multiple reheating processes and rapid, frequent start-up and shutdown of multi-cylinder expansion engine components, enabling a response time on the order of minutes and thus allowing flexible adaptation to the grid’s peak demand requirements. Upon completion, the project will become the salt cavern compressed air energy storage station in the world with the highest single-unit power output, the largest total capacity, and the best overall efficiency. It is expected to undergo 330 charge/discharge cycles per year; one charge can store 2.8 million kWh of energy, enough to meet the charging needs of 100,000 new energy vehicles. The system will enable the savings of 270,000 tons of standard coal per year and a reduction of 520,000 tons of carbon dioxide emissions. It will effectively enhance the grid’s capacity for regulation and its ability to accommodate new energy sources, providing essential support for the development of a new type of power system in the Yangtze River Delta region.
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