基于开环检测系统的全光纤电流互感器研究  

Open-loop detection of fiber optic current transducer

作　　者：李建中[1] 李泽仁[1] 张登洪[1] 温伟峰[1] 田建华[1] 王荣波[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《红外与激光工程》2014年第5期1648-1653,共6页Infrared and Laser Engineering

基　　金：中物院科学技术发展基金(2009B0201013)

摘　　要：商用化的全光纤电流互感器(FOCT)的误差一般要求小于0.2%,信号处理方法是决定该类传感器测量准确度的关键因素。论述了全光纤电流互感器的光路结构、工作原理、技术优势和干涉信号特征,提出了一种基于数字开环的全光纤电流互感器检测系统以及实现方案,论述了其工作原理和特点,试验结果表明,该检测方法提高了全光纤电流互感器的性能,使其满足了0.2级测量用电子式电流互感器的准确度要求,对解决全光纤电流互感器的信号处理、测量准确度和测量灵敏度等问题具有较大的参考价值。The error of commercial fiber optic current transducer （FOCT） must be less than 0.2%, the signal processing is a key factor for high-accuracy current sensing. The topology, operational principle, technical advantage, signal characteristics of fiber optic current transducer was introduced. A new scheme based on digital open-loop detection for the measurement system of the FOCT was presented, the working principles and features of this design were analyzed. The experimental results show that the FOCT’s measurement precision is improved by using the improved measurement system, and the FOCT can satisfy the accuracy requirements of the 0.2 class measuring electronic transducer, meeting the requirements of digital substation, so it is valuable for solving a great deal of problems, such as the signal processing, measurement accuracy, measurement sensitivity, et al.

关 键 词：全光纤电流互感器 开环检测 方波调制 法拉第效应 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置] TN911.7[自动化与计算机技术—控制科学与工程]