On May 20, the Golmud 350MW tower CSP project — the world's largest single-unit tower CSP project developed by Cosin Solar Technology Co., Ltd. — reached a significant engineering milestone with the successful assembly and completion of its first heliostat. This marks the project's full entry into the mass production and installation phase of solar field equipment, laying the groundwork for its scheduled grid connection.
The project is equipped with a total of 89,000 sets of 37m² high-precision intelligent heliostats. These products feature high surface accuracy and tracking precision, with a mirror reflectivity of 94% and batch tracking accuracy of up to 0.9 mrad.
To strictly control heliostat product quality, Cosin Solar has established a comprehensive quality management system covering the entire process from component manufacturing to mirror assembly. In the production phase, key components such as reflectors, welded parts, sheet metal parts, and electrical control components are all processed using automated production lines with dedicated tooling, ensuring stable and consistent product quality at the source. During the mirror assembly phase, the assembly workshop is equipped with automated production lines and dedicated tooling, integrated with an online inspection system. This system utilizes Cosin Solar's self-developed digital close-range photogrammetry technology, enabling high-precision automated surface inspection during heliostat assembly. This ensures the quality of every single heliostat, providing solid support for the efficient operation of the heliostat field.
Currently, construction at the project site is progressing well, with core milestones being steadily implemented. Suction tower body pouring, molten salt storage tank foundation construction, and conventional island foundation construction are all proceeding in an orderly manner, while supporting facilities in the plant front area have also been launched. Moving forward, the project will focus on advancing large-scale mirror assembly and on-site installation, reinforcing construction progress, and strictly adhering to construction safety and quality standards, all to ensure the project achieves its grid connection target on September 30, 2027.