20 December 2013 Research on Raman-OTDR sensing based Optical Phase Conductor (OPPC) temperature monitoring and the section temperature field
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Proceedings Volume 9044, 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 904405 (2013) https://doi.org/10.1117/12.2038154
Event: International Conference on Optical Instruments and Technology (OIT2013), 2013, Beijing, China
Abstract
OPPC (Optical Phase Conductor) is a particular type of electric optical cables which composite the fiber unit into the structure of traditional phase lines. The special design fully leverages the power system's own line resources and achieves dual functions of power transmission and communication simultaneously, particularly in the power distribution networks. Furthermore, Raman optical time domain reflectometry (ROTDR) based distributed temperature sensing (DTS) system integrates with OPPC, that is to plant a single or several multimode optical fibers into the fiber unit of OPPC, which can realize the remote, online, continuous measure and location for the conductor’s temperature. This kind of monitoring system has many advantages such as anti-electromagnetic interference, information sensing and data transmission unification, long life-cycle, light weight, long transmission distance and non-power supply on site. But nonetheless, there is still a problem has to been resolved, that is whether the temperature of DTS fiber’s position represents exactly the one of OPPC’s. This article takes the section temperature field of 400/50 OPPC as the research object. Based on the temperature data measured by the Raman distributed temperature optical fiber sensor, a large number of finite element analysis and experiments are developed. The DTS measurement results under different actual working conditions of current-carrying capacity, wind velocity and environment temperature are quantitative analyzed. The changing rules and the relationships among the measurement results of DTS, the maximum and the surface temperatures of OPPC, and the results of numerical simulations and experiments have been proposed and demonstrated. On the whole, the main contributions of this paper are: (1) According to the structure of 400/50 OPPC, the Fluid-Structure Interaction (FSI) methodology and the steady section temperature field model are established which can reveal the OPPC’s temperature profile in multiple conditions; (2) Optical fiber Raman distributed temperature sensor is applied to measure the inner temperature of OPPC’s optical unit, and the measurement accuracy can be up to ±1°C; (3) A thorough experimental scheme is proposed that verified the correctness of the temperature field analysis approach, and also certified that the inner fiber catheter temperature and the maximum temperature of OPPC are consistent under common working conditions.
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Jie Tong, Delong Yang, Qiang Gao, Yuqing Lei, Xi Chen, "Research on Raman-OTDR sensing based Optical Phase Conductor (OPPC) temperature monitoring and the section temperature field", Proc. SPIE 9044, 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 904405 (20 December 2013); doi: 10.1117/12.2038154; https://doi.org/10.1117/12.2038154
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