Power transmission line optical fiber composite ground wire icing state monitoring system

Abstract

The invention discloses a power transmission line optical fiber composite ground wire icing state monitoring system. The system comprises a distributed optical fiber acoustic sensing demodulator whichis used for transmitting an optical pulse and performing phase demodulation on the reflected Rayleigh scattering light; an optical fiber composite ground wire; a distributed optical fiber sensor which is used for monitoring the strain parameters of each measurement point of the optical fiber composite ground wire; a computer system which is used for receiving the strain parameters, sent by the distributed optical fiber acoustic sensing demodulator, of each measurement point of the distributed optical fiber sensor; a power transmission tower. According to the power transmission line optical fiber composite ground wire icing state monitoring system, no power supply unit exists, the service life of a monitoring device is not limited by the severe environments, and the device stability is high; the internal optical fibers of an OPGW optical cable erected on a line are used as the sensing optical fibers; meanwhile, no extra communication cost exists, and the information security is high; light is used as a sensing medium, the electromagnetic interference is resisted, and the data measurement is accurate; the system is long in monitoring distance, and is in distributed monitoring.

Description

technical field [0001] The invention relates to the technical field of power transmission lines, in particular to a system for monitoring the icing state of optical fiber composite ground wires of power transmission lines. Background technique [0002] The power system is a complex large system. Comprehensive reliability evaluation is a key technology and an important part of reliability engineering. Reliability evaluation is based on the reliability structure, life model and test information of the equipment, using statistical methods and means, The process of estimating the performance indicators of the reliability of the evaluation system has always been a difficult problem for the reliability evaluation of complex large systems. The main reason is that due to reasons such as technology, cost and test organization, the distributed optical fiber sensing system can The sensing optical fiber measures physical parameters such as stress, vibration and temperature, and provides...

AI Technical Summary

Problems solved by technology

[0003] However, at present, the icing state monitoring of domestic transmission lines is mainly realized by weighing / tension sensors, wire temperature / inclination sensors, and image monitoring; the existing weighing / tension sensors, wire temperature / inclination sensors All are electrical measurement sensors, which have characteristics such as nonlinearity, zero point drift, and creep. The measurement results are not stable, the service life is short, the reliability is not good, and they are easily disturbed by the strong electromagnetic environment around the transmission line; and the method of image monitoring is adopted. Due to the huge amount of calculation of the image recognition method, the image data needs to occupy a large number of power communication channels; in addition, in the case of heavy wind and snow, snowflakes and ice cover are easy to cover the monitor lens, making it impossible to accurately distinguish the ice cover of the wire. / COMS imaging system is less reliable in harsh environments

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