DESIGN AND FINITE ELEMENT ANALYSIS OF A TRANSFORMER TANK A REVIEW PAPER

MECHANICAL ENGINEERING

In electric power application, transformer device are required for transfer of electrical energy. The electrical energy transfer take place between two or more circuits due to electromagnetic induction. Transformer is used to step-up or step-down the voltage. 15MVA transformers are generally used in railways and they are step down transformer. The high voltage of transformer is 66kV while low voltage is 11.5KV. Transformer are huge bodies which consist of tank, radiator, OLTC chamber, and coil and core assembly with oil inside the tank. The size of typical housing/tank is large and having the weight of several tones (without coil assembly and oil). The housing contains coil assembly and the oil. The housing of a transformer comprises of various compartments fabricated from mild steel plates. Loaded transformer housing is subjected to its own weight plus coils and oil. It may be elevated to certain height. Strength and rigidity are the important criteria of design. Reduction in weight keeping the required strength for application will obviously result in to cost saving. In order to improve the strength to weight ratio of transformer tank the loading condition and magnitude of load are the important parameters from which the nature of stresses are determined. Design criteria are required to carry out the design based on the standards codes. Analysis of the design based on the design criteria and the modification are carried out if required and analysis of the model is carried out using FEA software.

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