China's first 840MVA/500kV transformer was launched

Baoding Tianwei Group Co., Ltd. once again wrote a heavy penage in the history of China's power generation equipment manufacturing: With the end of the last partial discharge test of the 840MVA/500kV transformer used in the Three Gorges, the product passed a test. At this point, Tianwei Group successfully completed the first domestic maximum capacity EHV transformer for the Three Gorges Project with high quality and on schedule, indicating that the Tianwei Group's transformer manufacturing capability has reached the world's advanced level.
In October 1999, Tianwei Group and Germany's Siemens jointly bid for the Three Gorges Project and won the bid in one fell swoop, becoming one of the largest domestic subcontractors of the Three Gorges Project main transformer, responsible for the manufacturing tasks of the four three-phase 840MVA/500kV generator transformers of the left bank power station.
The UHV generator transformer cooling method is ODWF. The transport weight is 380t and the total transformer weight is 480t. The no-load loss is 236kW, the load loss is 1500kW, the impedance voltage is 16.5%, the oil surface temperature rise is less than 55K, the winding temperature rise is less than 60K, and the noise level is less than 77dB.
Quality is the life of the Three Gorges products. The Tianwei Group has made meticulous preparations in terms of technical transformation of the plant and equipment, the introduction of Siemens technology, and the formulation of production plans. In order to ensure that no defects occur in every link of the product manufacturing process, Tianwei Group has established the “Three Gorges product expert team” to conduct technical appraisal and quality verification of the entire process of product manufacturing.
The production of the Three Gorges products provided a rare opportunity for the development of the Tianwei Group, and it was also a great challenge to the Tianwei Group's product manufacturing capabilities, planned deployment, and quality management. At present, through the successful cooperation with Siemens, Tianwei Group has fully provided the ability for the Three Gorges Project to provide technologically advanced, reliable, and well-looking transformer products. The successful trial production of this transformer symbolizes the further improvement of China's major equipment localization rate and lays a solid foundation for Tianwei Group to participate in the bidding work for the right bank of the Three Gorges Project.

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