光学电流互感器的关键技术  

Key technology of optical current transformer

作　　者：黄建华[1] 王佳[1] 

机构地区：[1]国电南京自动化股份有限公司,江苏南京210003

出　　处：《电力自动化设备》2009年第12期94-97,共4页Electric Power Automation Equipment

摘　　要：通过对光学电流互感器(OCT)的2种主要类型磁光电流互感器(MOCT)和光纤电流互感器(FOCT)的原理介绍和详细分析,指出MOCT的光学传感头加工、测量受光功率波动的影响,分析了FOCT光纤器件的非理想偏振特性,以及光纤材料的Verdet常数的补偿等关键技术和存在问题。MOCT、FOCT共同存在小电流测量时信噪比较低的问题。The principles of MOCT （Magneto - Optical Current Transducer） and FOCT （Fiber- Optic Current Transformer） are introduced in detail. It is pointed out that the processing and measuring of the optical sensor head of MOCT are influenced by optical power fluctuation and the characteristics of FOCT fiber-optic devices are of nonideal polarization. The key technologies of FOCT,such as the Verdet constant compensation,and its existing problems are explained. The low signal- noise ratio in small current measurement is the common problem of MOCT and FOCT.

关 键 词：电子式电流互感器:光学电流互感器 磁光电流互感器 光纤电流互感器 Faraday效应 Verdet 常数 

分 类 号：TM452.93[电气工程—电器] TM452.94