Fault feature extraction and classification of high voltage circuit breakers based on VMD and sample entropy

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (20) : 32-38.

WAN Shuting1,DOU Longjiang1,LI Cong1,LIU Ronghai2

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Abstract

A new method for fault feature extraction of high voltage circuit breakers was proposed based on variation mode decomposition (VMD) and sample entropy, and the support vector machine (SVM) was utilized to recognize the fault types.Firstly, after the vibration signal of the circuit breakers s preprocessed, the signal was decomposed by VMD.The decomposed IMFs were used to characterize various vibration events of the circuit breakers.Then the feature vector was acquired by calculating the sample entropy of IMFs.Finally, SVM was used to classify different operating states of circuit breakers.Simulation signals show that VMD has superior decomposition characteristics to deal with transient aperiodic vibration signals.Four types of fault states were extracted and recognized using the above method.The comparison results show that this method can extract fault characteristics effectively and classify fault types of high voltage circuit breaker accurately.

Key words

circuit breaker / VMD / sample entropy / fault feature extraction

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WAN Shuting1,DOU Longjiang1,LI Cong1,LIU Ronghai2. Fault feature extraction and classification of high voltage circuit breakers based on VMD and sample entropy[J]. Journal of Vibration and Shock, 2018, 37(20): 32-38

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