OLTC故障振动信号与正常OLTC振动信号相比，相同频带内信号的能量有

Compared with the normal OLTC vibration signal, the energy of the OLTC fault vibration signal has a large difference in the energy of the signal in the same frequency band. The energy of each frequency component of the signal contains rich fault information. Therefore, the BLIMF signal component decomposed by GOA-VMD is used as Features, which can effectively extract various fault features of OLTC. The energy features are expressed as follows:

OlTC fault vibration signal compared with normal OLTC vibration signal, the energy of the signal in the same frequency band is very different, in the signal frequency of the various components of energy contains a wealth of fault information, so the GOA-VMD decomposed BLIMF signal component as a feature, can effectively extract the various fault characteristics of OLTC, energy characteristics are shown as follows:

Compared with the normal OLTC vibration signal, the energy of OLTC fault vibration signal in the same frequency band is quite different, which contains rich fault information in the energy of each frequency component of the signal. Therefore, the blimf signal component decomposed by goa-vmd can be used as the feature to effectively extract all kinds of fault features of OLTC. The energy features are as follows:<br>