OPGW optical cable service life prediction system

Abstract

The invention discloses an OPGW optical cable service life prediction system. The system comprises an upper computer, a Raman scatterer, a Brillouin scatterer, a Rayleigh scatterer and a wavelength division multiplexing unit. Detection optical signals are provided through the Raman scatterer, the Brillouin scatterer and the Rayleigh scatterer respectively, the detection optical signals are coupled into unified detection optical signals through the wavelength division multiplexing unit and emitted into the OPGW optical cable, and mutual interference during independent emission is avoided under the action of the wavelength division multiplexing unit. Backscattered optical signals are converted into electric signals through the Raman scatterer, the Brillouin scatterer and the Rayleigh scatterer, and the upper computer calculates to obtain the distribution conditions of the thermal stress and the dynamic bending stress of the OPGW based on the scattered optical signals. The distribution conditions of the thermal stress and the dynamic bending stress of the OPGW can be accurately and effectively obtained through the backscattered optical signals obtained in real time, and thus, the fatigue life of the OPGW optical cable can be calculated more accurately.

Description

technical field [0001] Embodiments of the present invention relate to optical cable management technologies, and in particular to an OPGW optical cable life prediction system. Background technique [0002] OPGW optical cable (Optical Fiber Composite Overhead Ground Wire) is a composite overhead ground wire that integrates ground wire and communication functions. It has dual functions of ground wire and communication, and is now widely used in power systems. . [0003] The OPGW optical cable is exposed to the outdoor environment for a long time during the working process, and is affected by the wind in the environment, so that the OPGW optical cable is often accompanied by certain vibrations during the working process. Among them, the breeze vibration occurs most frequently. The breeze vibration makes the vibration wave of up and down bending distributed on the OPGW optical cable, resulting in the dynamic bending stress of the OPGW optical cable, resulting in fretting wear b...

AI Technical Summary

Problems solved by technology

[0004] However, many ideal conditions need to be set in the process of establishing the OPGW optical cable energy balance model, resulting in deviations in the calculation of the line breeze vibration frequency and amplitude, and inaccurate calculations of dynamic bending stress, which affect the accuracy of life assessment

In addition, the windy weather conditions in different regions are not the same, and the change of the ambient temperature field of the line will also affect the fatigue life of the OPGW optical cable, and the error in estimating the fatigue life according to the existing evaluation method is relatively large

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