All-fiber sensing integrated monitoring system applied to electric power tunnels

Abstract

The invention relates to an all-fiber sensing integrated monitoring system applied to electric power tunnels. The system comprises a monitoring center, an industrial computer, a fiber grating demodulator, a fiber grating current sensor, a fiber grating cable temperature measurement pack, a fiber grating liquid level sensor, a fiber grating displacement sensor and a fiber grating vibration sensor, wherein the monitoring center is connected with the industrial computer through fibers, the industrial computer is connected with the fiber grating demodulator, and the fiber grating demodulator is respectively connected with the fiber grating current sensor, the fiber grating cable temperature measurement pack, the fiber grating liquid level sensor, the fiber grating displacement sensor and the fiber grating vibration sensor through the fibers. The all-fiber sensing integrated monitoring system provided by the invention, through continuous monitoring of cable grounding wires, cables themselves and the electric power tunnels, according to data feedbacks of the sensors, can monitor tunnel environment in real time, can predict operation conditions and fault trends of the cables, and timely provides cable fault positions and maintenance guidance, thereby preventing severe accidents.

Description

technical field [0001] The invention belongs to the field of power tunnel monitoring, in particular to an all-fiber sensor comprehensive monitoring system applied to power tunnels. Background technique [0002] The insulation monitoring of high-voltage cable sheath is one of the most important monitoring contents of power cables. The traditional detection methods are mainly to measure the insulation resistance of the sheath through power failure or to measure the grounding current of the sheath with a live clamp ammeter (that is, manual inspection). In recent years, in order to improve the reliability index of transmission lines, there are fewer and fewer opportunities for high-voltage cable power outage maintenance. Due to the complex environment of underground cables, it is becoming more and more difficult to measure the grounding current of the sheath by traditional manual inspection, which requires a lot of manpower and material resources. Now there is an intelligent sh...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the environment of the grounding current test point of the sheath is complex, humid, and there is strong electromagnetic interference, which seriously affects the test accuracy, life of the current acquisition equipment, and the reliability and continuity of wireless transmission data

There are also manufacturers that use wired transmission, but compared with optical cable transmission, wired transmission has a large gap in transmission distance and transmission quality.

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