Research on the extraction method of high-voltage circuit breaker vibration signal based on IVMD

Abstract

The vibration of the high-voltage circuit breaker operating mechanism can indirectly reflect its mechanical motion state. In order to effectively extract the vibration signal characteristic quantity, the vibration signal of the circuit breaker is firstly analyzed theoretically as a series of simple harmonic superposition formation. For the characteristics of randomness and non-smoothness of the vibration signal, VMD (Variational Mode Decomposition) is recommended for calculation and analysis. The concept of quality factor is introduced to optimize the VMD. Finally, via the comparison of example simulation, IVMD can separate each component mode of the vibration signal effectively, which can solve the decomposition modal overlap problem of EMD.