Intelligent detection technology of potential grounding trouble of OPGW cable in substation based on attention model

Abstract

The traditional OPGW optical cable grounding hidden danger detection method has some limitations such as low detection efficiency, high cost, and easy of being affected by human factors. To this end, an intelligent detection technology based on the attention model of substation OPGW cable grounding hidden trouble is designed. Based on the principle of electric field coupling, the spatial transient electric field is measured, and the phase linearization of the MZI output signal is realized by equiphase extraction and resampling. The wavelet packet transform is introduced to extract the energy features of the signal subband, the spatial and channel attention mechanism is introduced, and the coordinates of the located fault point are displayed on 2D and 3D images using the VR-GIS virtual optical cable line information database. The experimental results show that when the test times are 3, the optical power value of the design method and the real value are −0.02 dB. The difference between the network communication fault signal and the actual fault signal is 0.3 dB at most, the error value is less than 1 %, and the recall rate is stable above 90 %.