中国电机工程学报2018，Vol.38Issue(9)：2772-2782,11.DOI:10.13334/j.0258-8013.pcsee.170131
全光纤电流互感器温度特性建模分析与实验研究
Modeling Analysis and Experiment Study on Temperature Characteristic of All-fiber Optical Current Transformer
摘要
Abstract
Temperature characteristic model of FOCT was established, where bending characteristic of sensing optical fiber was analyzed comprehensively. Temperature's effect on linear birefringence was explained with the distributed parameter model of optical fiber's linear birefringence in essence. Due to the bending characteristic of sensing coil, linear birefringence is resulted by asymmetric stress on optical fiber's cross section which is caused by temperature fluctuation. Phase difference of linear birefringence in unit length optical fiber is proportional to the variation of temperature and inversely proportional to the radius of the bending optical fiber. Temperature's effect on FOCT was quantified with temperature characteristic of Verdet constant. By using COMSOL, the coupling of optical field, magnetic field, temperature field and stress field was realized with finite element method. The simulation result shows that the optical rotation angle is decreased by linear birefringence, and the stress difference on optical fiber's cross section is proportional to the variation of temperature and inversely proportional to the bending radius of the optical fiber. Optical rotation angle is decreased with linear birefringence which is generated by temperature fluctuation. Besides, composite error of FOCT which was obtained by Verdet constant are accorded with theoretical analysis. Finally, experiment platform of FOCT was designed and set up. Linear test and temperature cycling test were performed. The changing trend of experimental error is basically agreed with theoretical error. The larger the temperature variation is, the larger the FOCT error will be. Compensatory measures must be taken in order to improve the temperature stability of FOCT. The correctness of theoretical analysis is verified by the results of simulation and experiment.关键词
全光纤电流互感器/温度特性/Verdet常数/线性双折射/有限元法/多物理场耦合Key words
all fiber current transformer/temperature characteristic/Verdet constant/linear birefringence/finite element method/multi-physics coupling分类
信息技术与安全科学引用本文复制引用
李岩松,王兵,刘君..全光纤电流互感器温度特性建模分析与实验研究[J].中国电机工程学报,2018,38(9):2772-2782,11.基金项目
国家自然科学基金项目(51277066).Project Supported by National Natural Science Foundation of China (51277066). （51277066）
