Fiber-Optical Sensor with an Acousto-Optical Filter for Monitoring the Status of Overhead Power Lines

The paper considers the problem of measuring the state parameters of overhead power lines. It suggests a measurement method using acousto-optic filters and fiber Bragg gratings of various types formed in the fiber. The principle of measuring parameters using fiber Bragg gratings and the design of sensors based on them are considered. The analysis of various types of fiber Bragg gratings and the specifics of their application for various tasks are presented. The paper studies the applicability of chirped Bragg gratings and the advantages of using them for simultaneous measurement of strain values and line temperatures. The presence of a linear dependence of the signal parameters on the measured state parameters of the overhead power line is shown, which proves the possibility of constructing sensors and measuring systems. The design of a distributed sensor for measuring the parameters of the state of the line combined directly with current-carrying wires for more accurate measurements is proposed. A model of the parameters of overhead power lines is developed and the possibility of analysis and determination of phenomena occurring in overhead power lines is shown.