Distributed sag online monitoring system and method for optical fiber composite overhead ground wire

Abstract

The invention relates to a distributed sag online monitoring system and a distributed sag online monitoring method for an optical fiber composite overhead ground wire. The online monitoring system comprises a distributed optical fiber temperature and strain interrogator, a distributed optical fiber sensor and a computer system and information processing unit, wherein the distributed optical fiber temperature and strain interrogator is installed in a high-tension transmission line transformer station, the distributed optical fiber sensor is a sensor optical fiber in an optical fiber composite overhead ground wire, the sensor optical fiber of the optical fiber composite overhead ground wire is connected to the distributed optical fiber temperature and strain interrogator through an interface in the transformer station, and the distributed optical fiber temperature and strain interrogator is connected to the computer system and information processing unit. According to the distributed sag online monitoring system and the distributed sag online monitoring method, distribution of the sags of each span in the whole line can be monitored, system reliability is strong; online monitoring is adopted, thus being good in real-time performance and high in efficiency; the main machine of the detecting device is placed in the transformer station so as to be less influenced by environment; no additional sensor is arranged on the scene, thus being easy to maintain.

Description

technical field [0001] The invention belongs to the field of electric power operation and maintenance, and in particular relates to a distributed online sag monitoring system and method for Optical Fiber Composite Overhead Ground Wire (OPGW). Background technique [0002] Sag measurement plays an important role in the safe operation of the control line, especially after a period of operation of the new line, the ground wire will sag to varying degrees. For safety, it is necessary to observe the sag Records to provide reliable data for the safe operation of the power grid; if the sag of the line does not meet the specified requirements, if it is too large or too small, it may cause disconnection and grounding faults due to the stress of the line exceeding the allowable value, and even damage the tower structure or windshield where the wire is erected. Cycloidal blowing causes short circuit, arcing and tripping accidents. Therefore, the sag inspection of conductors and ground...

AI Technical Summary

Problems solved by technology

[0003] But at this stage, the sag measurement of the ground wire is basically judged by the naked eye based on the experience of the line inspectors, and the observation is only carried out in special cases; although there are some online sag monitoring methods, they all need to be measured at each span of the line. Each sensor can only monitor the sag of one span. These methods are complex in construction and the sensors are easily damaged by the environment.

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