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- W3143646011 abstract "• The temperature measurement effectiveness of optical fiber in the cable was studied. • The temperatures of the cable were measured by the BOTDR and thermocouples. • The conductor temperature calculated by optical fibers at different radial positions. • The temperature differences between the optical fibers and the thermocouples were compared. • The relatively optimal radial-position of the optical fiber in the XLPE was proposed. To investigate the optimal radial-arranged-position of the optical fiber in the cross-linked polyethylene (XLPE) power cable, the fibers were arranged into three positions, including segmental conductor center, the insulation shield surface, and the waterproof compound center, respectively, and temperatures were measured based on the Brillouin optical time-domain reflectometry (BOTDR) technology while the thermocouples were arranged at the same positions mentioned above for comparison, respectively. Four cases of cable temperature rising experiments under the laying environments of duct and water were carried out. The conductor temperatures were calculated using the temperatures measured by the fibers at the insulation shield surface and waterproof compound center, and the differences between the calculated values and the measured temperatures by thermocouples were analyzed and compared. Results show the temperature differences at different axial positions of fibers at the insulation shield surface or the waterproof compound center were less than 0.22 °C. These were much less than the differences in different axial positions of thermocouples, among which the maximum is 4.8 °C. The maximum temperature differences between the fibers and the thermocouples at the three positions mentioned above were 4.9 °C, 3.2 °C, and 3.7 °C, respectively. The maximum transient relative differences of the conductor temperature between the calculated and measured values do not exceed 7.6% and 7.1%, respectively. And the steady-state relative differences do not exceed 2.6% and 4.7%, respectively. The insulation shield surface and waterproof compound center are recommended as the optical fiber arranged-position for calculating the conductor temperature." @default.
- W3143646011 created "2021-04-13" @default.
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- W3143646011 date "2021-07-01" @default.
- W3143646011 modified "2023-10-14" @default.
- W3143646011 title "Internal temperature measurement and conductor temperature calculation of XLPE power cable based on optical fiber at different radial positions" @default.
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- W3143646011 doi "https://doi.org/10.1016/j.engfailanal.2021.105407" @default.
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