摘要
全光纤电流互感器具有安全性高、抗电磁干扰、频响范围宽等突出优势,已广泛应用于直流电流测量,然而其测量精度受到光纤传感环熔接角度准直偏差的干扰。为此基于耦合模方程与琼斯矩阵建立了光纤电流传感数学模型,理论分析了光纤电流互感器存在传感环熔接误差时的温度特性与非线性误差特性。针对实际熔接偏差分布特性提出了全光纤电流互感器在现场二次熔接后的全电流范围测量误差评估策略,理论计算的全光纤电流互感器比差与实测值在全电流范围内一致。该文提出的非线性误差评估方法能够在不进行全电流范围试验情况下判断现场熔接后的全光纤电流互感器是否满足测量精度要求,有效保障了光纤电流互感器二次熔接后的测量精度。
The all-optical-fiber current transformer,known for its high safety,resistance to electromagnetic interference,and wide frequency response range,has been widely used in DC current measurement.However,its measurement accu-racy is affected by the misalignment angle of the optical fiber sensing loop during fusion splicing.In this paper,a mathematical model for optical fiber current sensing is established based on the coupled mode equations and the Jones matrix theory,and the temperature characteristics and nonlinearity error of all-optical-fiber current transformer with fu-sion splicing errors are analyzed.A method is proposed to calculate the measurement error of the all-optical-fiber current transformer over the entire current range after on-site secondary fusion splicing based on the actual distribution character-istics of fusion splicing errors.The theoretically calculated deviations of the all-optical-fiber current transformer match the measured values over the entire current range.The nonlinearity error assessment method presented in this paper can determine whether the all-optical-fiber current transformer meets measurement accuracy requirements after on-site fusion splicing on condition that a full current range test is not conducted,thus measurement accuracy can be effectively ensured after the secondary fusion splicing of the all-optical fiber current transformer.
作者
陈争光
徐子立
岳长喜
李嘉鑫
彭耐
徐敏锐
CHEN Zhengguang;XU Zii;YUE Changxi;LI Jiaxin;PENG Nai;XU Minrui(Equipment Management Department of State Grid,Beijing 100032,China;China Electric Power Research Institute,Wuhan 430074,China;Comcore Optical Intelligence Technologies Co.,Ltd.,Shanghai 200135,China;State Grid Jiangsu Electric Power Co.,Ltd.Marketing Service Center,Nanjing 210019,China)
出处
《高电压技术》
CSCD
北大核心
2024年第12期5310-5317,共8页
High Voltage Engineering
基金
国家电网公司科技项目(5500-202155473A-0-5-ZN)。
关键词
全光纤电流互感器
保偏光纤熔接
琼斯矩阵
非线性误差
准直偏离角
fiber optic current transformers
polarization-maintaining fiber fusion
Jones matrix
non-linear error
devia-tion of collimation angle
