Research on Calibration and Temperature Compensation of Distributed Optical Fiber Temperature Sensing Device for High Voltage Cable

doi:10.11985/2020.04.015

Abstract

Abstract:

In view of the problem that the distributed optical fiber temperature measuring device of high voltage cable cannot systematically carry out instrument calibration and performance evaluation, a calibration method of distributed optical fiber temperature sensing device is proposed. Based on this method, an intelligent verification platform based on automatic temperature control and acquisition is developed by using a programmable constant temperature water bath for main technical indicator calibration, such as temperature measurement accuracy and so on. The calibration platform is used to test the temperature accuracy of four cable distributed optical fiber temperature sensing devices with the same configuration. The temperature measuring accuracy of each device is less than ±1 ℃. The temperature drift data of each device are obtained by changing the ambient temperature, and the temperature compensation formula of each device in the range of 5-35 ℃ is obtained by using cubic fit. After the application of temperature compensation, the average error of each DTS device decreases 36%, and the maximum error decreases 85%. The accuracy and consistency of the temperature measurement results of each device are significantly improved. The maximum temperature drift error decreases about 33% compared with in stable environment, and the stability of temperature measurement data is higher.

Key words: High voltage cable, distributed optical fiber temperature sensing, online monitoring, temperature compensation, instrument calibration, performance evaluation

CLC Number:

TM933

LIU Jiaxin, LANG Yexing, WEI Defu, TANG Hong. Research on Calibration and Temperature Compensation of Distributed Optical Fiber Temperature Sensing Device for High Voltage Cable[J]. Journal of Electrical Engineering, 2020, 15(4): 121-127.

Figures/Tables 11

References 22

[1]	尹毅, 吴建东, 胡嘉磊, 等. 直流电缆主绝缘与屏蔽层界面形貌对电场畸变的仿真研究[J]. 电气工程学报, 2018,13(11):30-36.
	YIN Yi, WU Jiandong, HU Jialei, et al. Simulation of electric field distortion caused by interface morphology between insulation and shielding in HVDC cables[J]. Journal of Electrical Engineering, 2018,13(11):30-36.
[2]	朱乐为, 杜伯学. 环境友好型直流电缆料聚丙烯绝缘的电树枝研究进展[J]. 电气工程学报, 2018,13(11):21-29.
	ZHU Lewei, DU Boxue. Research status on electrical tree of polymer insulation materials in HVDC cables[J]. Journal of Electrical Engineering, 2018,13(11):21-29.
[3]	徐伟强, 魏云冰, 路光辉. 电力电缆及隧道在线监测与移动巡检协同策略探讨[J]. 电测与仪表, 2019,56(19):121-125.
	XU Weiqiang, WEI Yunbing, LU Guanghui. Discussion on the coordination strategy between online monitoring and mobile inspection of power cables and tunnels[J]. Electrical Measurement & Instrumentation, 2019,56(19):121-125.
[4]	刘毅刚, 罗俊华. 电缆导体温度实时计算的数学方法[J]. 高电压技术, 2005(5):52-54.
	LIU Yigang, LUO Junhua. Mathematical method of temperature calculation of power cable conductor in real time[J]. High Voltage Engineering, 2005(5):52-54.
[5]	赵建华, 袁宏永, 范维澄, 等. 基于表面温度场的电缆线芯温度在线诊断研究[J]. 中国电机工程学报, 1999(11):53-55,69.
	ZHAO Jianhua, YUAN Hongyong, FAN Weicheng, et al. Surface temperature field based online diagnoses study for electric cable’s conductor temperature[J]. Proceedings of the CSEE, 1999(11):53-55,69.
[6]	李忠华, 张霞. 应力锥体增强绝缘非线性属性对HVDC电缆终端电场分布的影响[J]. 电气工程学报, 2018,13(11):37-43.
	LI Zhonghua, ZHANG Xia. Effect of Nonlinear properties of stress cone reinforced insulation on electric field distribution of HVDC cable terminal[J]. Journal of Electrical Engineering, 2018,13(11):37-43.
[7]	郭宏燕, 雍明超, 卢站芳, 等. 一种电缆护层接地系统的取能电源模块设计[J]. 电气工程学报, 2019,14(2):55-60. doi: 10.11985/2019.02.010
	GUO Hongyan, YONG Mingchao, LU Zhanfang, et al. Design of a power supply module for grounding system of cable protective layer[J]. Journal of Electrical Engineering, 2019,14(2):55-60.
[8]	贾自杭, 李燕青. 智能变电站电缆局部放电在线监测系统的研究[J]. 中国电力, 2015,48(1):137-141.
	JIA Zihang, LI Yanqing. Researches on the online monitoring system for partial discharges of power cables in smart substations[J]. Electric Power, 2015,48(1):137-141.
[9]	WANG Youyuan, CHEN Rengang, CHEN Weigen, et al. Research situation and development trend of cable distributed temperature on-line monitoring technologies[C]// International Conference on High Voltage Engineering & Application,9-12 Nov. 2008,Chongqing, China. IEEE, 2008: 689-692.
[10]	彭超, 赵健康, 苗付贵. 分布式光纤测温技术在线监测电缆温度[J]. 高电压技术, 2006(8):48-50.
	PENG Chao, ZHAO Jiankang, MIAO Fugui. Distributed temperature system applied in cable temperature measurement[J]. High Voltage Engineering, 2006(8):48-50.
[11]	张振鹏, 赵健康, 饶文彬, 等. 电缆分布式光纤测温系统测量结果符合性的比对试验[J]. 高电压技术, 2012,38(6):1362-1367.
	ZHANG Zhenpeng, ZHAO Jiankang, RAO Wenbin, et al. Validate test for the calculation congruity of distributed temperature sensing system[J]. High Voltage Engineering, 2012,38(6):1362-1367.
[12]	杨耿杰, 苏爱国, 郭谋发, 等. 应用GPRS及光纤测温技术的电力电缆监测系统[J]. 电力系统及其自动化学报, 2009,21(4):100-105.
	YANG Gengjie, SU Aiguo, GUO Moufa, et al. Monitoring system for power cable based on GPRS and optical fiber thermometry technology[J]. Proceedings of the Chinese Society of Universities for Electric Power System and its Automation, 2009,21(4):100-105.
[13]	罗俊华, 周作春, 李华春, 等. 电力电缆线路运行温度在线检测技术应用研究[J]. 高电压技术, 2007(1):169-172.
	LUO Junhua, ZHOU Zuochun, LI Huachun, et al. Application of operation temperature detection technique for on-line power cable lines[J]. High Voltage Engineering, 2007(1):169-172.
[14]	STODDART P R, CADUSCH P J, PEARCE J B, et al. Fibre optic distributed temperature sensor with an integrated background correction function[J]. Measurement Science & Technology, 2005,16(6):1299-1304. doi: 10.1088/0957-0233/16/6/009
[15]	HAUSNER M B, SCOTT K. Identifying and correcting step losses in single-ended fiber-optic distributed temperature sensing data[J]. Journal of Sensors, 2016,2016:1-10.
[16]	国家能源局. DL/T 1573—2016 电力电缆分布式光纤测温系统技术规范[S]. 北京:中国电力出版社, 2016.
	National Energy Administration of the People’s Republic of China. DL/T 1573—2016 Technical specifications for power cable distributed optical fiber temperature sensor syetem[S]. Beijing:China Electric Power Press, 2016.
[17]	董林翰. 分布式光纤测温系统及其温漂研究[D]. 杭州:中国计量大学, 2017.
	DONG Linhan. Research on distributed optical fiber temperature measurement system and temperature drift[D]. Hangzhou:China Jiliang University, 2017.
[18]	宁枫. 分布式光纤拉曼测温系统空间分辨率即稳定性研究[D]. 重庆:重庆大学, 2012.
	NING Feng. A study on space resolution and system stability of distributed optical fiber Raman temperature measurement system[D]. Chongqing:Chongqing University, 2012.
[19]	张利勋, 欧中华, 刘永智, 等. 分布式光纤喇曼温度传感器的循环解调法[J]. 光子学报, 2005(8):1176-1178.
	ZHANG Lixun, OU Zhonghua, LIU Yongzhi, et al. A circulated demodulated method of distributed fiber Raman temperature sensor[J]. Acta Photonica Sinica, 2005(8):1176-1178.
[20]	吕安强, 李永倩, 李静, 等. 分布式传感光纤应变和温度同时标定方法[J]. 光子学报, 2014,43(12):110-114.
	LÜ Anqiang, LI Yongqian, LI Jing, et al. Simultaneous calibration method for strain and temperature of distributed sensing optical fibers[J]. Acta Photonica Sinica, 2014,43(12):110-114.
[21]	中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. GB/T 18890.2—2015 额定电压220 kV(Um=252 kV)交联聚乙烯绝缘电力电缆及其附件第2部分:电缆[S]. 北京:中国标准出版社, 2016.
	General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China, Standardization Administration of the People’s Republic of China. GB/T 18890.2—2015 Power cables with cross- linked polyethylene insulation and their accessories for rated voltage of 220 kV(Um=252 kV)—Part 2:Power cables[S]. Beijing:Standards Press of China, 2016.
[22]	刘刚, 王鹏宇, 周凡, 等. 电力电缆暂态热路模型中绝缘层的优化[J]. 高电压技术, 2018,44(5):1549-1556.
	LIU Gang, WANG Pengyu, ZHOU Fan, et al. Optimization on the insulating layer of transient thermal circuit model of power cable[J]. High Voltage Engineering, 2018,44(5):1549-1556.

序号	技术参数	技术指标要求值
1	温度测量准确度/℃	≤±1
2	空间分辨率/m	≤2
3	温度分辨率/℃	≤0.5
4	定位准确度/m	≤±1

DTS编号	水浴温度/℃	拟合参数
DTS编号	水浴温度/℃	a₀	a₁	a₂	a₃	拟合度
1#	20	17.775 42	0.149 12	-0.002 49	0.000 03	0.970 69
	40	37.339 74	0.252 21	-0.008 39	0.000 13	0.980 88
	60	57.329 71	0.257 50	-0.009 30	0.000 16	0.982 59
2#	20	17.854 01	0.164 35	-0.004 08	0.000 07	0.974 24
	40	37.555 49	0.208 76	-0.005 86	0.000 09	0.972 53
	60	57.964 11	0.153 04	-0.003 63	0.000 06	0.978 46
3#	20	18.130 44	0.152 09	-0.003 38	0.000 06	0.974 71
	40	37.607 30	0.239 30	-0.007 72	0.000 12	0.983 51
	60	58.018 59	0.160 44	-0.004 05	0.000 07	0.973 30
4#	20	17.452 06	0.215 23	-0.006 69	0.000 11	0.983 64
	40	37.886 40	0.140 44	-0.002 77	0.000 05	0.974 53
	60	57.359 58	0.228 74	-0.007 05	0.000 11	0.980 91