分布式单模光纤测温技术改进及应用研究
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摘要
智能电网建设是智慧城市建设必不可少的一部分。为解决光纤复合低压电缆(OPLC)温度的实时监测、故障定位与隐患发现等问题,在基于喇曼散射的单模光纤分布式测温系统的温度解调模块中,提出利用背向瑞利散射光与反斯托克斯光比值的双路解调的优化方案;在数字处理模块中,提出多次累加平均与多小波算法相结合的方法。通过改进这两项技术进一步实现了测温高精度、定位高精度和空间高分辨率的在线实时测量目标,同时还在OPLC状态监测及安全运行评估系统中得到了验证。通过对温度、光功率和负荷电流等参量一体化测量,为OPLC安全运行评估、运维检修工作的简化、易行提供了技术支持。
Smart grid construction is an essential part of smart city construction. In order to solve the real-time monitoring of optical fiber composite low-voltage cable(OPLC) temperature, fault location and hidden problems found, this paper proposes a dual-channel demodulation optimization scheme that uses the ratio of back Rayleigh scattered light to anti-Stokes light in the temperature demodulation module of distributed temperature measurement system based on Raman scattering for single-mode fiber.In the digital processing module, a method that combines multiple averaging and multi-wavelet algorithms is proposed. The optimization system further realizes on-line real-time measurement targets with high temperature accuracy, high positioning accuracy and high spatial resolution. At the same time, it has also been verified on the OPLC multi-level condition monitoring and safety operation evaluation system. The temperature of the cable, the load current and the optical power of the optical cable are concentrated on one device, which provides technical support for OPLC's safe operation evaluation and maintenance and repair work.
Smart grid construction is an essential part of smart city construction. In order to solve the real-time monitoring of optical fiber composite low-voltage cable(OPLC) temperature, fault location and hidden problems found, this paper proposes a dual-channel demodulation optimization scheme that uses the ratio of back Rayleigh scattered light to anti-Stokes light in the temperature demodulation module of distributed temperature measurement system based on Raman scattering for single-mode fiber.In the digital processing module, a method that combines multiple averaging and multi-wavelet algorithms is proposed. The optimization system further realizes on-line real-time measurement targets with high temperature accuracy, high positioning accuracy and high spatial resolution. At the same time, it has also been verified on the OPLC multi-level condition monitoring and safety operation evaluation system. The temperature of the cable, the load current and the optical power of the optical cable are concentrated on one device, which provides technical support for OPLC's safe operation evaluation and maintenance and repair work.
引文
[1]张旭苹,武剑灵,单媛媛,等.基于分布式光纤传感技术的智能电网输电线路在线监测[J].光电子技术,2017,37(4):221-229.
[2]余鹏,段绍辉,周正仙,等.光纤传感技术在电力电缆中的研究进展[J].光通信技术,2013,37(11):42-44.
[3]佟显义,宋丽萍.光纤高温传感器研究现状及应用前景[J].光通信技术,2014,38(10):8-10.
[4] ZHANG Xuping, QIAO Weiyan, DAN Yuanyuan, et al. A distributed optical fiber sensing system for synchronous vibration and loss measurement[J]. Optoelectronics Letters, 2016, 12(5):375-378.
[5]费芹.基于拉曼散射的分布式光纤测温系统的设计与优化[D].合肥:中国科学技术大学,2016.
[6]宋牟平,鲍翀,叶险峰.采用Simplex编码光外调制的拉曼散射分布式光纤传感器[J].中国激光,2010,37(6):1462-1466.
[7]陈福昌,戴杰,余超群,等.光纤环校正双端探测分布式拉曼光纤传感系统[J].光电工程,2016,43(8):33-38.
[8]艾幕.基于拉曼散射的光纤测温系统的改进与优化[D].大连:大连海事大学,2017.
[9] XU Pengbai, DONG Yongkang, ZHOU Dengwang, et al. 1200℃high-temperature distributed optical fiber sensing using Brillouin optical time domain analysis[J]. Applied optics, 2016, 55(21):5471-5478.
[10]王春丽,张春蕾.分布式光纤温度传感系统测温精度的提高[J].光通信技术,2014,38(11):8-10.
[11]孙柏宁.分布式拉曼光纤温度传感系统的噪声分析及优化[D].济南:山东大学,2014.
[12] HE Jianping, ZHOU Zhi, OU Jinping. Simultaneous measurement of strain and temperature using a hybrid local and distributed optical fiber sensing system[J]. Measurement, 2014, 47(1):698-706.
[13] CHEN Chi, CHEN Rong, WEI Fang. Experimental and application of spiral distributed optical fiber sensors based on OTDR[C]//2011 International Conference on Electric Information and Control Engineering, ICEICE 2011-Proceedings, April 15-17, 2011, Wuhan, China. Wuhan:IEEE Computer Society, 2011.
[14] YANG Xiaojun, ZHU Xiaofei, DENG Chi, et al. Application of distributed optical fiber sensing technologies to the monitoring of leakage and abnormal disturbance of oil pipeline[C]//Applied Optics and Photonics China:Fiber Optic Sensing and Optical Communications, AOPC 2017, June 4-6, 2017, Beijing, China. Beijing:SPIE, 2017.
[15]龚昌来.基于小波变换和均值滤波的图像去噪方法[J].光电工程,2007,34(1):72-75.
[2]余鹏,段绍辉,周正仙,等.光纤传感技术在电力电缆中的研究进展[J].光通信技术,2013,37(11):42-44.
[3]佟显义,宋丽萍.光纤高温传感器研究现状及应用前景[J].光通信技术,2014,38(10):8-10.
[4] ZHANG Xuping, QIAO Weiyan, DAN Yuanyuan, et al. A distributed optical fiber sensing system for synchronous vibration and loss measurement[J]. Optoelectronics Letters, 2016, 12(5):375-378.
[5]费芹.基于拉曼散射的分布式光纤测温系统的设计与优化[D].合肥:中国科学技术大学,2016.
[6]宋牟平,鲍翀,叶险峰.采用Simplex编码光外调制的拉曼散射分布式光纤传感器[J].中国激光,2010,37(6):1462-1466.
[7]陈福昌,戴杰,余超群,等.光纤环校正双端探测分布式拉曼光纤传感系统[J].光电工程,2016,43(8):33-38.
[8]艾幕.基于拉曼散射的光纤测温系统的改进与优化[D].大连:大连海事大学,2017.
[9] XU Pengbai, DONG Yongkang, ZHOU Dengwang, et al. 1200℃high-temperature distributed optical fiber sensing using Brillouin optical time domain analysis[J]. Applied optics, 2016, 55(21):5471-5478.
[10]王春丽,张春蕾.分布式光纤温度传感系统测温精度的提高[J].光通信技术,2014,38(11):8-10.
[11]孙柏宁.分布式拉曼光纤温度传感系统的噪声分析及优化[D].济南:山东大学,2014.
[12] HE Jianping, ZHOU Zhi, OU Jinping. Simultaneous measurement of strain and temperature using a hybrid local and distributed optical fiber sensing system[J]. Measurement, 2014, 47(1):698-706.
[13] CHEN Chi, CHEN Rong, WEI Fang. Experimental and application of spiral distributed optical fiber sensors based on OTDR[C]//2011 International Conference on Electric Information and Control Engineering, ICEICE 2011-Proceedings, April 15-17, 2011, Wuhan, China. Wuhan:IEEE Computer Society, 2011.
[14] YANG Xiaojun, ZHU Xiaofei, DENG Chi, et al. Application of distributed optical fiber sensing technologies to the monitoring of leakage and abnormal disturbance of oil pipeline[C]//Applied Optics and Photonics China:Fiber Optic Sensing and Optical Communications, AOPC 2017, June 4-6, 2017, Beijing, China. Beijing:SPIE, 2017.
[15]龚昌来.基于小波变换和均值滤波的图像去噪方法[J].光电工程,2007,34(1):72-75.