Fault monitoring system for ultralong optical cable and method

Abstract

The invention discloses a fault monitoring system for an ultralong optical cable and a method and belongs to the technical field of ultralong optical cable detection. The fault monitoring system for the ultralong optical cable disclosed by the invention comprises a first brillouin time domain detection system, a second brillouin time domain detection system, an uplink path optical fiber, a downlink path optical fiber and a plurality of optical repeaters arranged in all the sections of the uplink path optical fiber and the downlink path optical fiber, wherein the first brillouin time domain detection system and the second brillouin time domain detection system are used for emitting detection pulse light to the uplink path optical fiber and the downlink path optical fiber, collecting a backscattered brillouin light signal scattered by the detection pulse in the optical fiber channel and analyzing the monitoring data at each point on the optical fiber channel. According to the fault monitoring system for the ultralong optical cable and the method disclosed by the invention, the fault information at the abnormal point of the optical cable is analyzed by utilizing the original temperature and strain data acquired by the collected back scattered brillouin light signal, so that the high-precision fault positioning and diagnosis can be realized.

Description

technical field [0001] The invention relates to a fault monitoring system and method for an ultra-long optical cable, belonging to the technical field of ultra-long optical cable detection. Background technique [0002] With the rapid development of my country's economy and society, the demand for electricity continues to increase. The UHV DC power grid has the characteristics of long transmission distance, large capacity, low line loss, and saving line corridors. With the acceleration of construction of UHV DC line projects, safety issues have become increasingly prominent. How to detect faults in time is an important issue at present. At present, ultra-long submarine optical cables carry 90% of international communication traffic, and submarine optical cables are vulnerable to man-made and natural disasters. Therefore, the rapid and accurate location of the submarine cable line fault enables maintenance personnel to quickly repair the fault, which can reduce the cost of ...

AI Technical Summary

Problems solved by technology

At present, optical time domain reflectometer (OTDR) is mainly used to locate the optical cable, but OTDR can only measure the distance between the fault point of the optical fiber and the test point, and it is difficult to obtain the temperature and strain information of the optical cable at the fault point

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