毕业设计摘要_毕业设计的摘要

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摘要

电流传感器是电力系统中进行电能计量和继电保护设备，其精度及可靠性与电力系统的安全和经济运行密切相关。随着电力工业的发展，传统的电流传感器难以满足需求，而光电流传感器因其独特的优点具有潜在的应用价值，是未来电力工业电流测量发展的趋势。

本文通过广泛阅读资料，回顾了光学电流传感器近年来的进展，分析了该技术领域存在的问题，结合光纤光栅传感技术，根据超磁致伸缩材料特性分不加偏磁和加偏磁两种情况下对光纤光栅交流传感器进行了探索。

关键词光电流传感器；光纤布拉格光栅；超磁致伸缩材料

Abstract

The current transducer is the important device of power metering and relaying.Its’ precision and reliability related the safety and economy of operation in electric power system closely.With the development of power, conventional current transducer can’t meet requirements.While optical current transformer(OCT)have potential application cost because of its’ unique advantages, will be used to replace conventional current transducers in the future.In this paper, the present situation and state of R&D, existing problems in the field of OCT is reviewed and analyzed through extensive reading of the scientific papers and reports.AC current sensing was realized by DC bias condition and without DC bias condition.Keywordsoptical current transformer;fiber Bragg grating;giant magnetostrictive material