Publication: Modeling Single Phase Transformer By Finite Element Method
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Date
2010-04-01
Authors
Tan, Tze Yeen
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Abstract
Single-phase transformer is used commonly in power distribution system as step-up and step-down transformer and to connect networks with different voltage levels. It is also used extensively in power electronics applications and some applications may even require the transformer to operate at a high of frequency range. Finite Element Method (FEM) is a numerical method used to solve partial differential equations that describe the behavior of fields. The advantage of two-dimensional FEM analysis is that it can be used to analyze complex geometry and the result is more accurate than any analytical methods. The main aim of this project is to model a single-phase transformer using OPERA-2d software and investigate the electric and magnetic properties of the transformer. The FE models are compared with the actual transformer in every aspect and the one with least difference is selected as the model that can represent the actual transformer most precisely. In addition, the winding arrangement of the transformer is also modified to improve its performance. The type of transformer winding has a significant effect on magnetic leakage. This in turn affects the power loss and efficiency of the transformer. Transformer modeling allows a better understanding of the behavior of magnetic field in the model before further modifications are carried out to improve its performance.