Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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便攜式光纖電流互感器誤差分析及補償方法研究

來源:電工電氣發(fā)布時間:2023-08-28 09:28 瀏覽次數(shù):275

便攜式光纖電流互感器誤差分析及補償方法研究

劉勇1,張國昌2,張濤3
(1 海軍裝備部駐上海地區(qū)第一軍事代表室,上海 201913;
2 煙臺哈爾濱工程大學研究院,山東 煙臺 264006;
3 哈爾濱工業(yè)大學 儀器科學與工程學院,黑龍江 哈爾濱 150080)
 
    摘 要:針對電解鋁行業(yè)現(xiàn)場測試環(huán)境復雜的問題,提出了用一種便攜式光纖電流互感器結構來代替?zhèn)鹘y(tǒng)固定光纖電流互感器。分析了溫度對波片延遲度的影響,采用了一種變速旋轉光纖代替?zhèn)鹘y(tǒng)的波片來抑制溫度的影響;根據(jù)傳感環(huán)柔性安裝過程所導致的光路不閉合問題以及導體偏心位置進行研究,設計出一種柔性安裝傳感環(huán)骨架代替?zhèn)鹘y(tǒng)光纖環(huán),降低不均勻磁場所帶來的影響。該光纖電流互感器在 -20~70 ℃溫度下輸出比差小于 0.2%,同時在 100~3 000 A 的直流電流測試中滿足 0.2 級的精度要求。
    關鍵詞: 光纖電流互感器;變速旋轉光纖;不均勻磁場;柔性安裝
    中圖分類號:TM452+.94     文獻標識碼:A     文章編號:1007-3175(2023)08-0048-07
 
Research on Error Analysis and Compensation Method of
Portable Fiber Optic Current Transformers
 
LIU Yong1, ZHANG Guo-chang2, ZHANG Tao3
(1 The First Military Representative Office of the Navy Equipment Departments in Shanghai, Shanghai 201913, China;
2 Yantai Research Institute and Graduate School of Harbin Engineering University, Yantai 264006, China;
3 School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China)
 
    Abstract: The field test environment of the electrolytic aluminum industry is complex, so this paper proposes a portable fiber optic current transformer structure to replace the traditional fixed fiber optic current transformer. After analyzing the temperature influence on the delay of wave plate, the paper adopts a new kind of variable speed spin fiber to replace the traditional wave plate to suppress the temperature influence.Problems of the unclosed optical path and the conductor eccentric position occur during the process of the sensing ring flexible installation,so a flexible-installed sensing ring skeleton is designed to replace the traditional optical fiber ring to reduce the influence of nonuniform magnetic field. The output ratio difference of this optical fiber current transformer is less than 0.2% under -20 ~ 70 ℃, which meets the accuracy requirement of 0.2 level in the 100 ~ 3 000 A DC current test.
    Key words: fiber optical current transformer; variable speed spin fiber; nonuniform magnetic field; flexible installation
 
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