Recently, Baoding Tianwei Baobian Electric Co.,Ltd.'s research project for upgrading 220kV three-phase auto-transformers with on-load tap changers successfully passed expert technical review. The 220kV three-phase auto-transformers with on-load tap changers are in high demand in Jiangsu region. Due to their complex structure and high manufacturing difficulty, they impose strict requirements on design and production processes. This research project focuses on upgrading such products through comprehensive redesign of external structures, significantly improving product manufacturability, quality, and aesthetic appeal, thereby enhancing market competitiveness.
The technical upgrade is primarily reflected in three major aspects: First, through comprehensive redesign of the overall layout, the total volume of connecting pipe welding and assembly has been reduced by 40%, which will significantly shorten processing and assembly cycles and improve production efficiency. Second, the oil tank structure has been updated to a flat-top cylindrical tank, replacing the original bell-shaped tank that combined flat-top and slanted-top designs. This change not only improves standardization and aesthetic appearance, but also enables ground assembly of components such as tank cover lifting seats and connecting pipes through rational planning of pipeline cut-off points, significantly improving overall product quality while greatly enhancing installation safety and convenience. Third, internal wire routing has been optimized to reduce assembly difficulty and improve insulation reliability. The company plans to introduce 3D design technology to intuitively present switching connection schemes, completely resolving wiring challenges in the final assembly process.
The successful completion of this review marks significant improvements in structural design and manufacturing processes for this type of transformer. Currently, the design department has completed various simulation calculations as well as preliminary layout drawings and 3D exterior design work, and plans to deliver all drawings and 3D models by the end of October this year, providing sufficient technical reserves for future market bidding and product manufacturing.
Comments