All-fibre distributed cable safety and reliability monitoring system

Abstract

The invention relates to an all-fibre distributed cable safety and reliability monitoring system. The operation conditions of a power cable circuit in a power grid are subjected to omni-directional real-time intelligent monitoring by utilizing optical fibre sensors, and a research object is subjected to the researches, such as reliability analysis or fault diagnosis, according to a fused result byadopting an information fusion fault diagnosis technology so as to determine a fault more accurately without causing false alarm. The intelligent monitoring system can monitor the temperature, load carrying, stealing and invasion and the like of the power cable circuit and ensure safe and high-efficiency operation of the power grid; the information of various sensors is compressively analyzed andprocessed; and when an abnormal situation appears, corresponding linkage equipment is controlled to take certain measures to ensure the normal operation of the power grid. Meanwhile, aiming at the problems that missed alarm and false alarm are easily caused because of the damage to reality of power cable data, a prediction model of a sensor data stream and a prediction mechanism of the predictionmodel are given. When the prediction error of the model exceeds a preset threshold valve, the prediction model can be automatically adjusted, so that the quality of the information of the distributedoptical fibre sensors is improved, and effective modification can be performed when data abnormity appears; therefore, the defect rate of an optical fibre detection system is reduced to a certain degree; a large amount of field work is avoided; and the work efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, in particular to a method for calibrating the temperature field of a large-scale silicon carbide high-temperature reaction device. Background technique [0002] Power cable is an important carrier of power transmission. With the rapid development of the power supply network of urban power cables, the safe operation of power cables and accidents occur from time to time. One of the important reasons is the lack of effective online monitoring of cable systems. For example, the traditional cable temperature measurement method is to install point temperature sensing devices such as thermocouples on important parts of the cable for temperature measurement. This method is more economical and practical in some occasions, such as when the cable laying length is short. It can reflect the temperature at the local location of the cable, but it cannot realize the online monitoring of the entire cable l...

AI Technical Summary

Problems solved by technology

At present, the simplest way to improve the quality of data collected by sensor nodes is to use multiple sampling to collect enough sampled data for each sensor, and then take the average value of the sampled data as the final sampled data. Balanced, frequent collection frequency, strong association of perceived data, etc., directly and simply transfer the collected data to the computer for calculation, it is prone to inaccurate data detection

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