VMD-based transformer closing vibration signal characteristic frequency calculation method

The invention discloses a VMD-based transformer closing vibration signal characteristic frequency calculation method, which comprises the following steps of: optimizing VMD parameters by taking a decomposition evaluation coefficient as a standard, and performing optimal modal decomposition on a transformer surface closing vibration signal by using the VMD; constructing a VMD information entropy-kurtosis-correlation coefficient comprehensive evaluation model; extracting a transformer closing vibration signal VMD characteristic modal component by using a TOPSIS method; and performing Hilbert transform on the VMD characteristic modal component to determine the characteristic frequency of the closing vibration signal of the transformer. According to the method, the bandwidth and the center frequency of the modal component are determined through accumulation search by adopting the VMD, the defects of modal aliasing and over-decomposition of a recursive decomposition mode in the prior art are overcome to a certain