Simulation analysis of thermomechanical characteristics of power cable under the ducts laying

Cong, Yun; Wang, Gencheng; Yan, Xunping; Zhang, Zhenpeng; Li, Xiaobing; Zhao, Xin

doi:10.1109/powercon53785.2021.9697731

Cited by 1 publication

(2 citation statements)

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“…During the processing and transportation of the cable, the internal optical cable is often squeezed and stretched, which in turn causes the internal optical fiber to break, resulting in irreparable failures. The fiber optic cable adopts a spiral armored sheath with a certain excess length of the fiber, which can well protect the fiber from being squeezed and stretched, and has good second-class compressive and tensile properties [9]. However, when the optical fiber is used to measure the stress, the optical fiber must bear a certain axial tension, which can be monitored by the measuring device to reflect the stress of the cable insulation.…”

Section: Intellisense Cablementioning

confidence: 99%

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Research on axial stress monitoring of cables based on BOTDA

Xue

Yao

Liu

et al. 2023

Third International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2023)

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This paper introduces the basic principle of measuring the axial stress of optical fiber based on Brillouin time domain analysis technology (BOTDA), and applies distributed optical fiber sensing to the axial stress monitoring of power cables. We build a cable axial stress monitoring system based on BOTDA, and in view of the problem that the built-in optical fiber structure of the existing optoelectronic hybrid cable could not be effectively used for stress monitoring, we propose a new type of intelligent sensing cable. The built-in optical fiber adopts a nylon tight-packed structure, so that the force on the optical fiber can effectively represent the axial stress of the cable. We build the Brillouin frequency shift test platform to study the influence of different bending radii on the Brillouin scattering frequency shift of optical fibers when the cable was bent. The test results show that the built-in optical fiber of the cable adopts a nylon tight-packed structure, and combined with BOTDA technology, the stress distribution of each position of the cable can be effectively monitored by analyzing the Brillouin scattering frequency shift, which can reflect the axial stress of different bending radii of the cable. It provides strong support for establishing a cable stress database and building a comprehensive perception platform for power cables.

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Section: Intellisense Cablementioning

confidence: 99%

“…With the continuous expansion of cable scale, the difficulty of cable line operation and maintenance management gradually increases. In addition, in recent years, power cable line failures have occurred frequently, and the safe operation of power grids is facing severe challenges [1].…”

Section: Introductionmentioning

confidence: 99%