Analysis of AC losses in HTS pancake windings for transformer according to the operating temperature

AC loss is one of the most important parameters in high-temperature superconducting (HTS) ac devices. Among the HTS ac power devices, the transformer is the essential part in the electrical power system. But unfortunately, the transformer is the worst device concerning ac loss because of very large magnetization loss due to high magnetic field applied to the HTS wire. We calculated the magnetization losses in HTS pancake windings for transformer according to the operating temperature. Two kinds of arrangements of HTS pancake windings were adopted for calculation of ac loss of shell-type transformer, and the analysis results were presented and discussed.