Distributed optical fiber sensing system and detection method for intelligent power grid

Abstract

The invention belongs to a distributed Raman optical fiber sensing system, and discloses an intelligent power grid-oriented distributed optical fiber Raman sensing system and detection method considering long sensing distance and high spatial resolution. The system comprises a pulse laser, a wavelength division multiplexer, a sensing optical fiber, a first photoelectric detector, a second photoelectric detector and a data acquisition system, pulse laser output by the pulse laser passes through the wavelength division multiplexer and then enters the sensing optical fiber, Stokes light and anti-Stokes light reflected in the sensor pass through the wavelength division multiplexer, are detected by the first photoelectric detector and the second photoelectric detector and then are sent to the data acquisition system, one part of the sensing optical fiber is arranged in the thermostatic bath, the other part of the sensing optical fiber is arranged in the second photoelectric detector, and the thermostatic bath is used for carrying out thermostatic control on the sensing optical fiber in the thermostatic bath; and the data acquisition system is used for performing data acquisition and demodulation to obtain distributed temperature field information along the sensing optical fiber. The method improves the resolution and measurement precision of the system, and can be applied to the field of intelligent power grid detection.

Description

technical field [0001] The invention belongs to a distributed Raman optical fiber sensing system, specifically a smart grid-oriented distributed optical fiber Raman sensing system and a detection method that take into account both long sensing distance and high spatial resolution. Background technique [0002] The high-voltage transmission network all over the country has become the lifeblood of modern industry and national economy. With the increasingly complex and sophisticated power supply network, the safety monitoring of the power grid is becoming more and more urgent. Because there are many links in the power supply system that are easily disturbed by various factors, if the hidden dangers and faults in the power supply system cannot be discovered in time, major safety accidents will easily occur. However, the current single-point, multi-probe, and single-parameter sensors cannot meet the large-scale and long-distance detection requirements of the power supply network...

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the deficiencies of the existing technology, and the technical problem to be solved is: to propose a smart grid-oriented distributed optical fiber Raman sensing system and detection method that takes into account both long sensing distance and high spatial resolution, so as to solve the current There is a problem that the spatial resolution and sensing distance of the distributed optical fiber Raman sensing system cannot be balanced, so that the spatial resolution of the system can be increased to 1 cm

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