Measurement and analysis of UHV transformer noise with sound intensity and vibration method

With the rapid increase of the substation grade, the number of ultra-high voltage (UHV) transformer is increasing and the noise caused by the vibration of UHV transformer is becoming more and more serious. The vibration of UHV transformer is mainly generated from the magnetostrictive effect of the iron core and the action of the electromagnetic force of the winding. In this paper, the sound intensity and the vibration of the 1000kV UHV transformer are measured and the frequency characteristic is analyzed in detail. The vibration acceleration distribution on the oil tank surface of the transformer is measured and analyzed. The results can provide data support for the transformer noise source identification and the noise suppression measures.