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高温超导体的交流损耗直接影响超导电力装置的运行成本和稳定性,是判断超导电力设备设计是否合理的重要特性之一.在阐述准各向同性高温超导股线结构特点的基础上,首先对准各向同性高温超导股线的交流损耗和磁滞损耗进行仿真研究,利用有限元软件Comsol Multiphysics分析了交流背景磁场下的损耗,然后在对光纤布拉格光栅(optical fiber Bragg grating,简称FBG)波长与损耗关系标定的基础上,使用光纤布拉格光栅测量交流背景磁场下的交流损耗.理论计算与实验结果相吻合,表明在工频和液氮温度下股线的交流损耗以磁滞损耗为主.
The AC loss of high-temperature superconductors directly affects the operation cost and stability of superconducting power devices, which is one of the important characteristics to judge whether the design of superconducting power equipment is reasonable or not.Based on the characteristics of quasi-isotropic HTS strands, At first, the AC loss and hysteresis loss of isotropic high temperature superconducting strands are simulated, the loss under AC background magnetic field is analyzed by finite element software Comsol Multiphysics, and then the optical fiber Bragg grating FBG) based on the relationship between wavelength and loss calibration, the use of fiber Bragg grating measuring AC background magnetic field AC loss. Theoretical calculations and experimental results are consistent, indicating that the frequency and liquid nitrogen at the AC loss of wire to hysteresis loss Mainly.