Hao Z R, Wang Q, Da J P, et al. Research and application of all-fiber optic current transformer based on optical reciprocity loop[J]. Opto-Electron Eng, 2020, 47(4): 180671. doi: 10.12086/oee.2020.180671
Citation: Hao Z R, Wang Q, Da J P, et al. Research and application of all-fiber optic current transformer based on optical reciprocity loop[J]. Opto-Electron Eng, 2020, 47(4): 180671. doi: 10.12086/oee.2020.180671

Research and application of all-fiber optic current transformer based on optical reciprocity loop

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  • Aiming to the problems of traditional active electromagnetic transformer such as easy magnetic saturation, poor stability and anti-interference ability, and limited installation, etc., this paper designs the optical fiber current transformer to measure current by rotation angle based on Faraday magneto-optic effect; HB Spun optical fiber is used as sensing element without saturation and can be used for high current measurement. The designed transformer uses the optical reciprocity loop to eliminate the interference of temperature and optical fiber defect on the measurement of optical rotation angle, and uses reflector to enlarge the optical rotation angle to four times, which can realize accurate measurement of small current; Sensing element uses flexible fiber ring with shape variability characteristic, which helps for measurement of current in complex space. The paper compares flexible fiber ring with different loops to standard current transformer, the results show that optical reciprocity loop can eliminate the interference of temperature on the current measurement and the accuracy of all-fiber current transformer is 0.5 in the range of -5 ℃~70 ℃, which can realize the accurate measurement of small current.
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  • [1] 王谦, 陆宇航, 刘勇, 等.光学互感器在智能变电站的应用现状与发展前景[J].电力系统及其自动化学报, 2016, 28(12): 89-95. doi: 10.3969/j.issn.1003-8930.2016.12.015

    CrossRef Google Scholar

    Wang Q, Lu Y H, Liu Y, et al. Application status and development prospect of optical transformer in smart substation[J]. Proceedings of the CSU-EPSA, 2016, 28(12): 89-95. doi: 10.3969/j.issn.1003-8930.2016.12.015

    CrossRef Google Scholar

    [2] 肖智宏.电力系统中光学互感器的研究与评述[J].电力系统保护与控制, 2014, 42(12): 148-154. doi: 10.7667/j.issn.1674-3415.2014.12.024

    CrossRef Google Scholar

    Xiao Z H. Study and comment of the optical transformers in power system[J]. Power System Protection and Control, 2014, 42(12): 148-154. doi: 10.7667/j.issn.1674-3415.2014.12.024

    CrossRef Google Scholar

    [3] 赵俊, 许立国, 须雷.基于保偏光纤温度传感器的全光纤电流互感器[J].电力电子技术, 2016, 50(10): 70-72. doi: 10.3969/j.issn.1000-100X.2016.10.021

    CrossRef Google Scholar

    Zhao J, Xu L G, Xu L. A polarization maintaining fiber temperature sensor based on all fiber optic current transducer[J]. Power Electronics, 2016, 50(10): 70-72. doi: 10.3969/j.issn.1000-100X.2016.10.021

    CrossRef Google Scholar

    [4] 王志, 初凤红, 吴建平.全光纤电流传感器温度补偿研究进展[J].激光与光电子学进展, 2014, 51(12): 120005.

    Google Scholar

    Wang Z, Chu F H, Wu J P. Progress in all-fiber current sensor temperature compensation[J]. Laser & Optoelectronics Progress, 2014, 51(12): 120005.

    Google Scholar

    [5] 王晓琪, 汪本进, 程虎.光纤电流互感器中传感光纤的椭圆双折射测量[J].光学与光电技术, 2015, 13(2): 43-47.

    Google Scholar

    Wang X Q, Wang B J, Cheng H. Measurement of the elliptical birefringence inside the sensing fiber of an all-fiber optical current transducer[J]. Optics & Optoelectronic Technology, 2015, 13(2): 43-47.

    Google Scholar

    [6] 童维军, 杨晨, 刘彤庆, 等.光纤传感用新型特种光纤的研究进展与展望[J].光电工程, 2018, 45(9): 180243. doi: 10.12086/oee.2018.180243

    CrossRef Google Scholar

    Tong W J, Yang C, Liu T Q, et al. Progress and prospect of novel specialty fibers for fiber optic sensing[J]. Opto-Electronic Engineering, 2018, 45(9): 180243. doi: 10.12086/oee.2018.180243

    CrossRef Google Scholar

    [7] 王景飞, 梁京伟, 董前民.反射式Sagnac干涉光纤电流互感器的传感头误差研究[J].光学与光电技术, 2011, 9(10): 23-26.

    Google Scholar

    Wang J F, Liang J W, Dong Q M. Study of sensing coil errors in the in-line Sagnac interferometer current transducer[J]. Optics & Optoelectronic Technology, 2011, 9(10): 23-26.

    Google Scholar

    [8] 姜中英, 张春熹, 徐宏杰, 等.线性双折射对光纤电流互感器影响的研究[J].光学技术, 2006, 32(S1): 218-220, 223.

    Google Scholar

    Jiang Z Y, Zhang C X, Xu H J, et al. Study of fiber optic current transducer error due to linear birefringence[J]. Optical Technique, 2006, 32(S1): 218-220, 223.

    Google Scholar

    [9] 王红星, 关远鹏, 胡春潮, 等.全光纤电流互感器温度误差研究[J].电力自动化设备, 2017, 37(12): 200-204.

    Google Scholar

    Wang H X, Guan Y P, Hu C C, et al. Temperature error of fiber optic current transformer[J]. Electric Power Automation Equipment, 2017, 37(12): 200-204.

    Google Scholar

    [10] 阎嫦玲, 王耀, 罗苏南, 等.用于发电机保护的柔性全光纤电流互感器[J].电力自动化设备, 2017, 37(4): 191-196.

    Google Scholar

    Yan C L, Wang Y, Luo S N, et al. FFOCT for generator protection[J]. Electric Power Automation Equipment, 2017, 37(4): 191-196.

    Google Scholar

    [11] 尹士玉, 张世昌, 吴甜.全光纤电流互感器温度误差分析与温度误差补偿[J].电测与仪表, 2017, 54(7): 16-21. doi: 10.3969/j.issn.1001-1390.2017.07.003

    CrossRef Google Scholar

    Yin S Y, Zhang S C, Wu T. Temperature error analysis and temperature error compensation of the all fiber optic current transformer[J]. Electrical Measurement & Instrumentation, 2017, 54(7): 16-21. doi: 10.3969/j.issn.1001-1390.2017.07.003

    CrossRef Google Scholar

    [12] 肖浩, 刘博阳, 湾世伟, 等.全光纤电流互感器的温度误差补偿技术[J].电力系统自动化, 2011, 35(21): 91-95.

    Google Scholar

    Xiao H, Liu B Y, Wan S W, et al. Temperature error compensation technology of all-fiber optical current transformers[J]. Automation of Electric Power Systems, 2011, 35(21): 91-95.

    Google Scholar

    [13] 罗苏南, 曹冬明, 王耀, 等. ±800kV特高压直流全光纤电流互感器研制及应用研究[J].高压电器, 2016, 52(10): 1-7.

    Google Scholar

    Luo S N, Cao D M, Wang Y, et al. Development and application research of ±800 kV UHVDC fiber optical current transducer[J]. High Voltage Apparatus, 2016, 52(10): 1-7.

    Google Scholar

  • Overview: With the smart grid development and the increase of voltage level, demand for high current and high voltage measurement is increasing gradually, and the weakness of bulky insulation structure, easy magnetic saturation, low anti-interference ability and low precision of electromagnetic transformer are gradually exposed. The optical fiber current transformer designed in this paper has the advantages of high accuracy, simple insulation structure and strong ability of anti-interference, so it can meet the needs of smart grid development and the increase of voltage level. This transformer utilizes the principle of optical reciprocity to eliminate the influence of temperature and external disturbance on current measurement, so it realizes the high precision measurement. In order to verify the measurement characteristics of the optical reciprocal loop, the optical fiber sensing rings wound in different circles are placed in the temperature control box, and the measured value of the sensing rings and the standard current value are compared in the full temperature range. The results show that the sensing rings has the advantage of high precision and good temperature-reducing characteristics. Finally, the measured values of the different circles of optical fiber rings are compared with the standard current values in the full range. It is found that the more the circles of optical fiber sensing rings, the higher the measurement accuracy of optical fiber sensing rings. The Central Yellow River Diversion Project and Xiaolangdi Yellow River Diversion Project is an important project in the construction of Dashui Network in the "Twelfth Five-Year Plan" of Shanxi Province. The water supply range is wide. In order to ensure the reliable operation of the power system in the project, stator selective protection grounding system of hydropower station power station is gradually being promoted, and zero-sequence current as an important criterion for the device requires accurate measurements. The detection of the zero sequence current of the motor unit requires transformers with large measuring range, high precision of the small current measurement. In this paper, the optical fiber sensing ring of the transformer designed is a flexible structure, which can be directly wound on the spot according to the shape of the measured conductor, thereby avoiding the work of disassembling the measured conductor. Because the optical transformer designed has a large range, high precision in full range, and can be wound on the spot, it can be applied to the stator selective protection grounding system of hydropower station power station, which broadens the field of use of optical transformers.

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