一种无调制器的全光纤光学电流互感器  

A Modulatorless All-Fiber Optical Current Transformer

作　　者：罗苏南[1] 阎嫦玲[1] 邵通广 丁晔[1] 须雷[1] 刘东超[1] LUO Sunan;YAN Changling;SHAO Tongguang;DING Ye;XU Lei;LIU Dongchao(NR Electric Co.,Ltd.,Nanjing Jiangsu 211102,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《湖北电力》2021年第6期75-79,共5页Hubei Electric Power

摘　　要：目前研究及应用的全光纤光学电流互感器均采用铌酸锂相位调制器或PZT相位调制器进行相位调制,光路系统复杂、成本较高,且采集单元受原理限制不能远距离布置,使应用受到限制。本文研制了一种无调制器的全光纤光学电流互感器,采用Faraday旋光镜实现相位偏置,文章介绍了无调制器全光纤光学电流互感器的构成、原理及信号处理方式,给出了线性度、温度特性、谐波特性等主要性能测试结果。采用Faraday旋光镜的无调制器全光纤光学电流互感器光路系统简单、成本低,采集单元可远距离布置,拓展了全光纤光学电流互感器的应用。At present,all-fiber optical current transformers studied and applied adopt lithium niobate phase modulator or PZT phase modulator for phase modulation. The optical path system is complex with high cost,and the acquisition unit can not be arranged remotely due to the limitation of principle,so the application is limited. In this paper,a no-modulator all-fiber optical current transformer is developed,and the phase offset is realized by Faraday rotating mirror. The composition,principle and signal processing method of no-modulator all-fiber optical current transformer are introduced,and the main performance test results such as linearity,temperature characteristics and harmonic characteristics are given. The optical path system of no-modulator all-fiber optical current transformer using Faraday rotating mirror is simple with low cost,and the acquisition unit can be arranged remotely,which expands the application of all-fiber optical current transformers.

关 键 词：光学电流互感器 调制器 Faraday旋光镜 采集单元 

分 类 号：TM452.92[电气工程—电器]