摘要
研究了全光纤电流互感器(AFOCT)系统中敏感光纤器件老化对系统测量准确性的影响。首先,基于法拉第磁光效应,采用琼斯矩阵建立AFOCT系统的传输模型;结合存在双折射的传感光纤的琼斯矩阵,给出系统的注入电流测量值的表达式。进一步,搭建了光学测试系统,实验表征传感光纤的双折射率;基于测试结果,对传感光纤的琼斯矩阵以及系统传输模型进行校准,以降低AFOCT系统注入电流的测量误差。最后,对传感光纤开展了相当于实际运行3个月的加速老化试验,并测试获得老化后传感光纤的双折射率。采用校准后的AFOCT系统传输模型,分析了老化后双折射率的变化对系统注入电流测量值的影响。实验结果表明,在传感光纤老化3个月之后,系统就已经产生了0.2955%的相对误差。
The influence of aging of sensitive optical fiber devices on the measurement accuracy of the AFOCT system is studied.First-ly,based on Faraday magneto-optical effect,the transmission model of the AFOCT system is established with the help of Jones matrices.With Jones matrices of the sensing fiber having birefringence,the measured value of injected current to the system is given.Further,a measurement system is built to experimentally characterize the birefringence of the sensing fiber.Also,the Jones matrix of the sensing fi-ber and the transmission model of the AFOCT system are calibrated to minimize the measurement error of the injected current to the AFOCT system.Finally,the accelerated aging experiment is carried out for the sensing fiber,which corresponds to the actual operation of this fiber for 3 months.Afterwards,the birefringence of the sensing fiber after aging is measured.Then,by applying the calibrated transmission model of the AFOCT system,the erroneous value of the system injection current is obtained.The experimental results show that the obtained system injection current has a relative error of 0.2955%after the 3 months aging of the sensing fiber,which is not ac-ceptable for the actual operation.
作者
陈明锟
陈辉
杨肖
彭光强
王越杨
孙豪
陆云清
王瑾
CHEN Mingkun;CHEN Hui;YANG Xiao;PENG Guangqiang;WANG Yueyang;SUN Hao;LU Yunqing;WANG Jin(School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing Jiangsu 210023,China;Maintenance and Test Center of CSG EHV Transmission Company,Guangzhou Guangdong 510700,China;Kunming Bureau of CSG EHV Transmission Company,Kunming Yun’nan 650021,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2024年第2期209-215,共7页
Chinese Journal of Sensors and Actuators
基金
南方电网直流输电设备状态评估与故障诊断重点实验室开放基金项目。
关键词
全光纤电流互感器
琼斯矩阵
双折射
敏感光纤老化
校准
all-fiber optical current transformer
jones matrix
birefringence
aging of sensitive optical fiber
calibration
