Core and winding are main vibration sources which generate transformer vibration

monitoring vibration signals of core and winding

can predict and diagnose operational status of ransformer. Select general changes made S13—12500/35 type oil-immersed non-excitation voltage regulating power transformer

the two fiber Bragg grating vibration sensors are laid inside transformer

vibration signal is acquired directly under transformer load. By JADE algorithm

two groups load signal are separated

after separation

a groups is found that signal energy is concentrated at 100 Hz which is closer to core vibrational signal spectral characteristics

another group of signals are distributed at each frequency

and closer to spectral characteristics of winding vibration signal.