Recently, two SFPll-400000/110 power transformers independently developed by Xidian West and self-developed by Xidian Electric passed the various supervision tests conducted by the Electrical Equipment Quality Inspection Center.

This product is the transformer with the largest capacity in the 110kV voltage grade power transformer product line developed and manufactured by Xichang Changxing. It has the characteristics of large capacity, high impedance, large magnetic leakage, etc., and the loss requirement proposed by the user is very low. Therefore, how to reduce the loss of large-capacity, high-impedance products to ensure product temperature and mechanical performance requirements, while addressing the large-capacity, high voltage, large-scale product transportation problems become a key technical difficulties. Therefore, on the basis of introducing, absorbing, and digesting the technology of the previous products, Xidang often uses a variety of technologies such as magnetic flux leakage control, spurious reduction, and eddy-current loss, and applies them to 110kV products to form a new design solution. Validation of the data obtained from product testing has been performed well.

With the implementation of the national power grid reform and energy saving policy, high voltage, large capacity, and low loss will gradually become the future direction of transformers. Large-capacity, high-impedance, and low-loss transformers will also become mainstream products in the market. West Electric often changes in the research and development of this product, and realizes the first-time application of high leakage magnetic leakage control processing technology in the l10kV voltage grade series. Its successful development has accumulated valuable data and experience for the design of high-capacity high-impedance transformers in the future, which lays a solid foundation for the development of ultra-large capacity 220kV and 330kV products in the future and provides strong market development. Strong support.