Performance of $\hbox{YBa}_{2}\hbox{Cu}_{3} \hbox{O}_{x}$ Tapes With Different Structures Under AC Overcurrent Conditions

The voltage and temperature of $\hbox{YBa}_{2}\hbox{Cu}_{3}\hbox{O}_{x}$ (YBCO) tapes with different structures were measured at alternating-current overcurrent conditions in liquid nitrogen. A safety temperature limit of the tapes with different structure was obtained based on the measured critical-current degradation data of the YBCO tapes. According to heat conduction model, the electrical and thermal performances of YBCO tapes were analyzed for tapes with different stabilizers. The comparison was presented for simulation and test data. The results are helpful for the design of superconducting electrical equipment.