A portable fiber-optic current transformer (P-FOCT) based on the Faraday effect utilizing the fiber jumper and the flexible sensing coil is proposed to enhance the portability and improve the design for disassembly of FOCT in the electrolytic aluminum industry. To ensure the accuracy of P-FOCT, the polarization crosstalk of fiber jumper and the conductor eccentric error are studied. According to the theoretical analysis and experimental results, the relative error of P-FOCT would decrease as the distance between the current conductor and the non-closed node of the sensing coil increases. A new sensing head is designed and experiments show that the error is 0.31 % at variable temperature from 233K to 343K, which meets the requirement for accuracy in the electrolytic aluminum industry.

提出了一种基于法拉第效应的，利用光纤跳线和柔性感应线圈的便携式光纤电流互感器（P-FOCT），以提高便携性并改善电解铝行业中FOCT的拆卸设计。为了保证P-FOCT的准确性，研究了光纤跳线的偏振串扰和导体偏心误差。根据理论分析和实验结果，P-FOCT的相对误差会随着电流导体与感应线圈非闭合节点之间距离的增加而减小。设计了一种新的传感头，实验表明，在233K至343K的可变温度下，误差为0.31％，可以满足电解铝行业对精度的要求。