Recently, the steel roof truss of the main powerhouse of Unit 2 of the Huaneng Jintan 2×350 MW Salt Cavern Compressed Air Energy Storage Power Generation Project, constructed by SEPCO1 and supervised by Shanghai Electric Power Supervision Co., Ltd., was successfully hoisted into place. The smooth completion of this key milestone marks that the construction of the main powerhouse has entered the sprint stage, laying a solid foundation for the enclosure and water cutoff of the main powerhouse and subsequent equipment installation, and powerfully advancing the overall progress of the project.

As a new type of long-duration energy storage power station, the Huaneng Jintan 2×350 MW Salt Cavern Compressed Air Energy Storage Power Generation Project is expected to charge and discharge 330 times per year, storing energy for 8 hours and generating power for 4 hours. The entire process requires no fossil fuel supplementary combustion, enabling efficient resource utilization and zero carbon emissions while avoiding environmental pollution.

To ensure the smooth implementation of the hoisting work, the Huaneng Jintan Project Department of SEPCO1 planned and organized in advance and made meticulous arrangements. In the process of formulating the hoisting scheme, faced with difficulties such as large spans and the narrow assembly site in the heat exchange area outside Row A, as well as high hoisting difficulty, they organized detailed planning for machinery layout, site coordination, hoisting sequence, lifting point setup, and safety protection measures, and carefully optimized the hoisting scheme using BIM technology and other means. During the assembly of the steel roof truss, they strictly controlled the quality of processes such as fit-up and welding, strictly implemented the "Thunder Action" for work safety, and strengthened supervision and inspection. Before hoisting, personnel were organized to conduct safety technical briefings. Finally, under the full-process supervision of the owner, the supervisor, and project department personnel, the hoisting and positioning work was completed safely and smoothly.

It is reported that this project is currently the compressed air energy storage power station with the largest single-unit power, the largest total capacity, and the highest comprehensive efficiency in the world. A single charge can store 2.8 million kWh of electricity, and the annual power generation will reach 924 million kWh. It can effectively enhance the power grid's regulation capacity and the consumption capacity of new energy, promote the efficient utilization of renewable energy, contribute energy storage support to the early realization of China's "dual carbon" goals, and serve the national energy security strategy.