Pole tower-optical cable positioning method based on distributed optical fiber sensing and topology matching

By acquiring the Brillouin frequency shift signal of optical cable using BOTDA/BOTDR equipment, and combining it with ambient temperature monitoring and wavelet threshold denoising, a temperature adaptive calibration model is established. The characteristics of the tower hanging point are extracted, and a dynamic sag correction algorithm is constructed to achieve accurate matching between the optical position of the optical cable and the geographical coordinates of the tower. This solves the problems of inaccurate optical cable positioning, environmental interference, and untimely updates of topology in existing technologies, and improves the efficiency of power grid operation and maintenance.

CN122268465AActive Publication Date: 2026-06-23INFORMATION & COMMNUNICATION BRANCH STATE GRID JIANGXI ELECTRIC POWER CO
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Patent Information

Application Number
CN202610735066.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-26
Publication Date
2026-06-23
Estimated Expiration
2046-05-26

AI Technical Summary

Technical Problem

Existing technologies for locating optical cable faults in power grid transmission lines suffer from problems such as the disconnect between the optical position and the geographical location of the optical cable, insufficient anchoring accuracy of the tower hanging point, positioning drift caused by environmental interference, large length conversion errors, and inability to autonomously update the topology relationship. These problems result in low positioning efficiency, high misjudgment rate, and high operation and maintenance costs.

Method used

BOTDA/BOTDR distributed optical fiber sensing equipment is used to collect Brillouin frequency shift signals of optical cables. Combined with ambient temperature monitoring and wavelet threshold denoising, a temperature adaptive calibration model is established. The first-order difference method is used to extract tower hanging point features. A dynamic sag correction algorithm is introduced to construct a three-in-one mapping relationship between optical cable optical position, tower number, and geographical coordinates. The fault type is identified by OTDR equipment to achieve gradual or abrupt topology updates.

Benefits of technology

It improved the accuracy of tower attribution, reduced the misjudgment rate of positioning, reduced the operation and maintenance cost of optical cables, improved the emergency response speed for faults, and achieved precise matching of optical cable optical position and tower geographical coordinates and autonomous updating of topology relationship.

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Abstract

The invention discloses a tower-optical cable positioning method based on distributed optical fiber sensing and topology matching, and relates to the technical field of electric power communication optical cable operation and maintenance, and the method comprises the steps: obtaining a Brillouin frequency shift signal, an environment temperature and an icing thickness, and completing the signal denoising; calibrating the de-noised signal to obtain a calibrated frequency shift signal; extracting the optical position of a tower hanging point optical cable by using the hanging point signal mutation feature, and constructing a hanging point feature set; calculating a dynamic sag correction coefficient by combining the environment temperature, the icing thickness and the optical cable stress, and realizing conversion between the optical length and the actual geographical length of the optical cable; and establishing a three-in-one mapping relation to complete optical cable point location positioning. According to the method, on the basis of BOTDA / BOTDR distributed optical fiber sensing equipment and OTDR equipment, through the process logic of data acquisition, signal processing, dynamic correction, topological mapping and self-healing updating, correlation positioning of the tower and the optical cable is achieved, the problem that the optical position of the optical cable is not accurate to correspond to the tower is solved, and the tower affiliation accuracy is improved.
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