THE FAULT DIAGNOSIS OF HIGH VOLTAGE BREAKERS BASED ON WAVELET SINGULARITY DETECTION

Abstract

The occurrence of mechanical failure of high voltage breakers not only can cause time shift of vibration impulse events, but also can bring the change of some wave crest shape in time domain. Using the signal singularity detection theory based on wavelet transform, the singularity exponents of vibration signal envelopes can be obtained, and which are used as feature parameters of fault diagnosis. In this paper, though analyzing the vibration signals of high voltage breakers switching on and comparing the singularity exponents when they are in good condition and in fault condition, the conclusion of that preferable effect can be acquired if the singularity exponents are used in mechanical failure diagnosis of breaker could be deducted.