Positioning method and device for optical fiber composite overhead ground wire

Abstract

The invention proposes a method for positioning a fiber composite overhead ground wire. The method comprises: using a Brillouin optical time domain reflectometer to acquire the Brillouin frequency shift signal inside the fiber composite overhead ground wire in real time; pre-processing the Brillouin frequency shift signal to obtain the data sequence of the fiber distribution type measuring spots rowed along the wire sequence; extracting from the data sequence the characteristics positioning data; based on the characteristics positioning data, determining the geographical positions of various rod towers of the power transmission line on the measuring fiber; and according to the geographical positions of the rod towers on the measuring fiber and in combination with the geographical coordinates of the rod towers in the line parameters, determining the real time geographical coordinates of the fiber distribution type measuring spots. The invention further proposes a device for positioning the fiber composite overhead ground wire. With the method, high positioning accuracy is achieved and real time monitoring of the geographical position information of the overhead ground wire becomes possible.

Description

technical field The invention belongs to the technical field of intelligent state monitoring of power systems, and in particular relates to a positioning method and device for optical fiber composite overhead ground wires. Background technique Distributed optical sensing technology is a sensing technology that uses optical fiber as the sensing element and signal transmission medium. It can realize the status change monitoring of distributed measuring points along the optical fiber. It is widely used in power transmission lines, oil pipelines, etc. , The field of large-scale distributed monitoring. As a main application field of distributed optical sensing technology, status monitoring of overhead transmission lines can realize status monitoring along overhead transmission lines by connecting an optical fiber inside the optical fiber composite overhead ground wire on the transmission line. Since the overhead transmission line is usually long, under the comprehensive influen...

AI Technical Summary

Problems solved by technology

Aiming at the defects in the prior art, the present invention provides a positioning method and device for optical fiber composite overhead ground wire, which solves the problem of low positioning accuracy of existing positioning methods, corrects positioning errors caused by line reconstruction in real time, and enhances distributed light Application Effect of Sensing Technology in Condition Monitoring of Overhead Transmission Lines

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