Analysis of Electromagnetic Characteristics of 6.5 MVA/25 kV HTS Traction Transformer Using <i>T–A</i> Formulation

Low AC loss of the winding high-capacity high temperature superconducting (HTS) traction transformer is a very important link to introduce large capacity into commercialization. A new structure proposed for transformer. The HV windings are made double pancake coils (DPCs), which wound by 4.8 mm-wide tapes, and LV windings, 12 solenoid coils. electromagnetic characteristics analyzed H-formulation homogenization method T-A formulation respectively. Significant HTS tape cost reduction could be achieved without compromising using hybrid structure. We report that model used calculate with flux diverters (FDs) at end. results meet design requirements less than 2 kW, shows feasibility Due good convergence poor under transformer, no one has before. simplicity applied large-scale system, form mesh generation improve accuracy calculation in this paper. This paper verifies correctness formulation, provides reference application more fields