Research on Vibration Characteristics of
Windings and Core of Oil-Filled Transformer
Ji Shengchang,Cheng Jin,Li Yanming
(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract:The vibration signals of core and winding measured from the transformer oil
tank with vibration measurement system are investigated.Based on the theoretical analysis
of each factor inducing vibration of core and winding,the experiments validated that the
fundamental frequency magnitudes of core and winding vibrations are linear to square of
no-load voltage and loading current respectively.It is found that high order harmonic
contents exist in the core vibration signals and these are not linear to square of no-load
voltage.The winding vibrates dominantly at 100 Hz.It is pointed out that the influence of
no-load voltage on core vibration and the influence of loading current on winding
vibration ought to be considered,especially,for the situation of remarkably undulatory
net-voltage.
Keywords:transformer;core; winding;vibration;no-load voltage;loading current