Distribution of AC loss in a HTS magnet for SMES with different operating conditions

• We present a model to calculate the distribution of AC loss for a storage magnet.
• Comparative analysis of AC loss with different operating conditions has done.
• The nonuniform distribution factor “d” is proposed to estimate the inhomogeneity of a storage magnet.
• The model predicts the loss distribution and crucial areas which are suffering from the high AC loss. This is significant for the conduction-cooled structure design.

The AC loss induced in superconducting tape may affect the performance of a superconducting device applied to power system, such as transformer, cable, motor and even Superconducting Magnetic Energy Storage (SMES). The operating condition of SMES is changeable due to the need of compensation to the active or reactive power according to the demand of a power grid. In this paper, it is investigated that the distribution of AC loss for a storage magnet on different operating conditions, which is based on finite element method (FEM) and measured properties of BSCCO/Ag tapes. This analytical method can be used to optimize the SMES magnet.