Modelling And Analysis Of Transformer Tank

Abstract

Transformers are among the most important blocks in any power generation plant. Enhancing the performance of a particular transformer would positively reflect on the quality of its power transmission. Hence, power plant OEM (original equipment manufacturers) is continuously in pursuit of minimizing losses for reasons of efficiency, energy conservation and environmental factors as well as commercial considerations. The most common reasons of transformer failures are caused by excessive vibrations due to resonance. In this project vibration transfer in the structure shall be characterized.

The tank was modeled by using NX 8.0 and it was imported to ansys 14.0 To find the natural frequency & vibrations of transformer tank one Newton force is applied. In this project two types of analysis are being done. They are Modal analysis and harmonic analysis. In modal analysis displacement is being calculated. Harmonic analysis are carried out to calculate amplitude at different displacements Harmonic analysis is done by taking generated rfrq file from modal analysis. These two analyses are carried out by taking same node points on the walls of the tank for all the models. Comparing the results of all the models it’s being concluded that, the model by adding horizontal stiffeners achieved assumed objective to minimize vibrations to avoid resonance at critical operating frequencies at 50Hz and 100Hz frequency.