Numerical Simulation of Frequency-dependent AC Transport Losses in HTS 2G Tape with Copper Stabilizer

Tendency of environmental damage reduction pushes to a replacement of traditional power sources with renewable ones. Some of renewable generation systems, such as solar or wind power plants, have an inconsistent power output, so an application of energy storages becomes inevitable for power quality enhancement. One of the most promising of them is superconducting magnetic energy storage (SMES) wounded with high temperature superconductor (HTS) tape. It has no losses at normal operation with direct current, but transient processes during charge or discharge of SMES induce AC losses. The scope of this paper covers the problem of numerical calculation of separate losses components. The problem is investigated for 2G HTS tape with copper stabilizer and non-magnetic substrate. Dependencies on frequency are obtained for hysteresis and eddy current losses. As a result, it has been determined that hysteresis losses preponderate on lower frequencies, while eddy current losses dominate in the upper range.