Mechanical Fault Diagnosis of a Disconnector Operating Mechanism Based on Vibration and the Motor Current

The mechanical fault diagnosis of a disconnector operating mechanism using single signal is not sufficiently accurate and reliable. To address this problem, paper proposes new method based on the vibration motor current signal. First, analysis stator envelope, segmented envelope RMS values are extracted. Then, processed with VMD (Variational Mode Decomposition). In paper, number modal decompositions K selected according to entropy. Second, effective value segment fused energy entropy each IMF component construct feature parameters for identification. Finally, fusion weighting algorithm AdaBoost proposed train an SVM as strong classifier improve correct rate. applied 220 kV mechanism. can effectively identify three states