Case Study of Shell-Type Power Transformer Tank Vibration in Different Loading Conditions
Proceedings of 15th International Scientific Conference Engineering for Rural Development 2016
Marina Čerpinska, Renārs Vītols, Oskars Sīmanis

Vibration measurements on power transformer tanks have been used to monitor their technical condition and detect internal failures for already 30 years, but the health grade system for vibration measurements of power transformers has not been yet developed, because constructions of transformers differ significantly. This case study was carried out for a shell-type oil-filled power transformer, which has been in operation since 1995. The unit under study had high vibration on some transformer tank points. This paper addresses the causes of transformer vibration, contribution of windings to transformer tank vibration, vibration spectrum and vibration dependence on cooling oil temperature. To make the experiment both a portable data analyzer and permanent vibration sensors (10 piezo-electric accelerometers sending signals to PC) were used. For the particular transformer vibration in no-load mode occurred to be greater than in loaded mode, which is unusual behavior compared to other researchers’ reports. So, it was shown that there is no quantifiable vibration velocity rise on the transformer tank next to the windings in load modes compared to no-load modes. The dominant vibration spectrum frequency was proved to be 100 Hz in all loading conditions. The largest 100 Hz values were registered on the side where the core is not covered by windings - on the sides closer to the shell. The power transformer tank vibration in different loading conditions, specifically, with different cooling oil temperature was also registered and analyzed. Analysis of the experimental data for the particular transformer suggested that there was inverse correlation of tank vibration with the cooling oil temperature – the vibration decreases as the oil temperature increases on some points on the transformer tank next to the cooling pipe.


Atslēgas vārdi
transformer, vibration, condition assessment, shell-type, windings, spectrum

Griščenko, M., Vītols, R., Sīmanis, O. Case Study of Shell-Type Power Transformer Tank Vibration in Different Loading Conditions. No: Proceedings of 15th International Scientific Conference Engineering for Rural Development, Latvija, Jelgava, 25.-27. maijs, 2016. Jelgava: 2016, 409.-414.lpp. ISSN 1691-5976.

Publikācijas valoda
English (en)
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