Investigation on noise radiation to structure vibration correlation in vibroacoustic of transformer

Depending on the transformer type and its applications in power systems, there are various methods for the noise sources identification. Noise radiation of structure can be estimated and characterized knowing its vibrations. The paper will explain basic theory of structure born noise and its correlation to the structure vibration based on vibration velocity results from Laser Doppler Vibrometry measured on transformer. Discussion on qualitative and quantitative evaluation of transformer noise radiation from vibration pattern image and FFT spectrum is performed