In order to early detect the vibration fault of power transformer

it needs to select effective position to detect vibration state of transformer. Aiming at characteristics of power transformer core winding vibration and through finite element analysis

position of measuring points is determined. In model S13—12500/35 oil-immersed transformers subjects

FBG sensor is installed on the vibration measuring point location of core and winding

transformer vibration signal is detected and frequency spectrum is analyzed under different load. The results show that the vibration signal frequency of transformer is focused on the 100 Hz and the frequency doubling; under80 %

90 %

100 % load

vibration amplitude of the amplitude-frequency signal at 100 Hz increases as the load of transformer increases.