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准各向同性高温超导股线交流损耗的实验研究
李彦1,2王银顺1刘明闯1,2陈浩1侯言兵2皮伟1邓加军3
0
(1 华北电力大学新能源电力系统国家重点实验室 北京 102206 2 华北电力大学高电压技术与电磁兼容北京市重点实验室 北京 102206 3 华北电力大学数理学院 北京 102206)
摘要:
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。
关键词:  高温超导股线,交流损耗,磁滞损耗,光纤布拉格光栅
DOI:
基金项目:国家自然科学基金资助项目,课题项目号51477053。新能源电力系统国家重点实验室(华北电力大学)资助项目,课题项目号KZ0002
Experimental Research on AC Loss of Quasi-isotropic HTS Strand
Li Yan1,2 Wang Yinshun1 Liu Mingchuang1,2 Chen Hao1 Hou Yanbing2 Pi Wei1 Deng Jiajun3
(1State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China 2Key Laboratory of HV and EMC Beijing,North China Electric Power University,Beijing 102206,China 3Mathematical and Physical Science,North China Electric Power University,Beijing 102206,China)
Abstract:
AC loss of high temperature superconductor (HTS) has a direct impact on the operation cost and stability of superconducting power devices, and is thus one of important characteristics which identifies whether the design of superconducting power devices is reasonable. Based on presenting geometric structure of quasi-isotropic HTS strand, the paper focuses on simulating AC loss and hysteresis loss of quasi-isotropic HTS strand, the loss in AC magnetic field is calculated by Comsol Multiphysics finite element software. Calibration of the relationship between optical fiber Bragg grating (FBG) wavelength and loss provides the foundation for the subsequent measurement of AC loss in AC magnetic field. The measurement results are in agreement with calculated ones, which shows that the hysteresis loss dominates the AC loss at power frequency and liquid nitrogen(LN2) temperature.
Key words:  HTS strand,AC loss,hysteresis loss,optical fiber Bragg grating (FBG)

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