Vibration Signal Processing Method of GIS Equipment Based on Wavelet Analysis and Spectrum Analysis

GIS mechanical state identification and defect diagnosis technology based on self‐excited vibration of assembled circuit breaker

“…In [16,17], vibration characteristics of GIS caused by electromagnetic, electrostatic forced parts, and operation of switchgear etc., in the normal mechanical state, have been studied, but it is un-involving the mechanical fault feature extraction and fault diagnosis in abnormal mechanical state. In [18][19][20][21], diagnostic techniques to detect abnormal contact defects occurring at different locations (e.g. extra-high voltage (EHV) switchgear, GIS bus connector, disconnector, and grounding knife brake) by measuring vibrations in enclosures of GIS have been proposed.…”