AFOCT系统中敏感光纤器件的老化对系统测量准确性的影响
Influence of the Aging of Sensitive Optical Fiber on the Measurement Accuracy of All-Fiber Optical Current Transformer System
陈明锟 1陈辉 1杨肖 1彭光强 2王越杨 2孙豪 3陆云清 1王瑾1
作者信息
- 1. 南京邮电大学通信与信息工程学院,江苏 南京 210023
- 2. 中国南方电网有限责任公司超高压输电公司检修试验中心,广东 广州 510700
- 3. 中国南方电网有限责任公司超高压输电公司昆明局,云南 昆明 650021
- 折叠
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 0.295 5％的相对误差.
Abstract
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.
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Key words
all-fiber optical current transformer/jones matrix/birefringence/aging of sensitive optical fiber/calibration引用本文复制引用
基金项目
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()
出版年
2024
国家科技期刊平台
NSTL
万方数据