摘要
电力电缆全光纤电流传感器能够准确检测电缆运行电流、故障电流等特性电流,使得电力电缆的安全稳定运行大幅度提高。但全光纤电流传感器由于其结构特性,导致在测量过程中存在很大的稳定性和可靠性欠缺问题,从而限制了全光纤电流传感器应用到实际中。文章针对对称的螺旋嵌套型的全光纤电流传感器结构,采用COMSOL对光纤传感系统的传输场进行仿真模拟;并分别对线性双折射效应和检偏器多维偏差作用下光波偏振态的变化规律进行仿真计算和对比分析。结果表明:检偏器位置偏差对偏振态测量结果影响显著;轴偏差ζ会增大偏振态测量结果的幅值,轴偏差ξ会减小偏振态测量结果的幅值;当检偏器多维偏差值与线性双折射相比拟时,检偏器多维偏差对偏振态测量结果产生的影响远大于线性双折射;随着电流增大,检偏器多维偏差与线性双折射协同作用对偏振态测量结果的影响效果互为加强。
At present, all-optical fiber current sensor of power cable can accurately detect the characteristic current of power cable, such as operating current and fault current, etc., which effectively supports the safe and stable operation of power cable. However, due to the structural characteristics of all-fiber current sensor, there is a great short of constancy and dependability in the measurement process. Therefore, the application of all-fiber current sensor in practice is limited. Aiming at the structure of symmetrical spiral nested all-fiber current sensor, the transmission field of the optical fiber sensor system is simulated using COMSOL multi-mode field coupling simulation software. The variation of polarization state of light wave under the action of linear birefringence effect and multi-dimensional deviation of polarizer is simulated and compared. The simulation results obtained respectively by linear birefringence and multi-dimensional deviation of polarizer are compared and analyzed. The results show that the position deviation of the polarizer has a significant effect on the measurement results of polarization state, the ζ of axis deviation will increase optical polarization angle and ξ of axis deviation will decrease optical polarization angle. The affection caused by multi-dimensional deviation of polarizer is much larger than linear birefringence on optical polarization angle. With current increasing, the affection caused by multi-dimensional deviation and linear birefringence on optical polarization state measurement results are mutually strengthened.
作者
李巍巍
邓元实
杨兰
罗洋
崔涛
任俊文
赵莉华
Li Weiwei;Deng Yuanshi;Yang Lan;Luo Yang;Cui Tao;Ren Junwen;Zhao Lihua(State Grid Sichuan Electric Power Research Institute,Chengdu 610065,China;School of Electrical Engineering,Sichuan University,Chengdu 610065,China)
出处
《电测与仪表》
北大核心
2022年第7期183-192,共10页
Electrical Measurement & Instrumentation
基金
国网四川省电力公司科技项目(52199718001Q)。
关键词
全光纤电流传感器
Faraday磁光效应
检偏器多维偏差
光波偏振态
full optical fiber current sensor
Faraday magneto-optical effect
multi-dimensional deviation of polarizer
optical polarization
