Improved empirical wavelet transform (EWT) and its application in non-stationary vibration signal of transformer.

ABSTRACT: The resonant frequency of the transformer contains information related to its structure. It is easier to identify the resonance frequency in the vibration signal during the hammer test and power on than in the operation of the transformer, because the vibration caused by the load current does not need to be considered during the hammer test and power on. Therefore, an analysis method with simple calculation, fast calculation speed and easy real-time monitoring is needed to deal with these two non-stationary vibrations. Vibration monitoring can understand the health status of transformer in real time, improve the reliability of power supply and give early warning in the early stage of faults. A new frequency domain segmentation method is proposed in this paper. This method can effectively p

SUBMITTER: Ni R 

PROVIDER: S-EPMC9584928 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature