Magnetic field and magnetization loss calculation in an HTS transmission cable considering the axial field component of SC tape

Abstract

One of the major issues in power application of the HTS transmission cable is the AC loss as it is related with power transmission capacity and efficiency. Although the HTS transmission cable has only transport current without external magnetic field, the magnetization loss as well as the transport current loss is generated because any tape constituting transmission cable is exposed to magnetic fields given by currents flowing in other tapes of cable. The magnetic field induced by layer flowing current in the transmission cable have two components, that is, axial component magnetic fields at inner region and azimuthal component at outer region of each layer for transmission cable axis due to winding structure of cable. Therefore, any tape in the cable experience parallel and axial component magnetic field for tape wide face. So, the magnetization loss must be calculated in consideration of this field configuration.Index Terms-HTS transmission cable, magnetic field component, magnetization loss, SC tape.

Current distribution among layers of single phase HTS cable conductor

“…(9a-d) and eddy current loss in Cu former expressed in Eq. (10) [12,13]. where N i is the number of HTS tapes in layer i of cable conductor around the former, i = 1,2,. .…”