Optical fiber bending loss principle-based wire strand breakage and damage detection method

Abstract

The invention relates to an optical fiber bending loss principle-based wire strand breakage and damage detection method. The method comprises the following steps of: (1) fixing a sensing optical fiber for detection on a high-voltage power transmission wire at a certain angle; (2) transmitting detection laser to an incident end of the sensing optical fiber for detection by an optical time domain reflectometer; (3) returning a back Rayleigh scattering light signal to the optical time domain reflectometer by the sensing optical fiber for detection; (4) after receiving the back Rayleigh scattering light signal by the optical time domain reflectometer, performing sampling acquisition and analytic processing on the signal to obtain back Rayleigh scattering light power at each different position of the optical fiber transmission line and displaying a detection result curve on a panel of an oscilloscope of the optical time domain reflectometer; and (5) acquiring state information of the sensing optical fiber for detection, and further detecting and positioning strand breakage and damage existing on the high-voltage power transmission wire. Compared with the prior art, the method has the advantages of accuracy in positioning, capabilities of improving the polling efficiency of the power transmission line and the reliability of the power system and the like.

Description

technical field [0001] The invention relates to a fault detection method of a power transmission line, in particular to a detection method for wire breakage and damage based on the principle of optical fiber bending loss. Background technique [0002] High-voltage transmission lines are called the "vessels" of the national power system, which are directly related to the country's economic construction and national defense construction. With the increasing development of the national economy in recent years, the modern power system continues to develop rapidly in the direction of large units, large capacity and high voltage. The operating conditions of the power system are more stringent, and the distance of power transmission is increasing. Also getting higher and higher. The high-voltage transmission wire is the carrier of the electric power of the transmission line, and is an important part of directly ensuring the safe and stable operation of the power system. [0003] ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are mainly two methods for inspection of transmission lines: ground visual inspection and helicopter aerial survey. , manual line inspection has low precision, high labor intensity, and there are blind spots; helicopters can carry a variety of instruments and equipment to carry out aerial surveys of transmission lines, with high accuracy and efficiency, but due to the influence of geographical and climate conditions in the inspection area, there are Potential safety hazards and high inspection costs

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