Research on Calculating Eddy-Current Losses in Power Transformer Tank Walls Using Finite-Element Method Combined With Analytical Method
| Autor: | Xiangdong Yu, Baodong Bai, Min Shen, Xiuke Yan, Dexin Xie |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Mean squared error 020209 energy 02 engineering and technology Mechanics Finite element method Electronic Optical and Magnetic Materials law.invention Magnetic field symbols.namesake Maxwell's equations law 0202 electrical engineering electronic engineering information engineering Eddy current symbols Curve fitting Perpendicular Electrical and Electronic Engineering Fourier series |
| Zdroj: | IEEE Transactions on Magnetics. 52:1-4 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2015.2494375 |
| Popis: | An improved analysis method to calculate the eddy-current losses in large power transformer tank walls is presented. In this model, the perpendicular magnetic flux density has been obtained at discrete points on the surface of the tank by the finite-element method (FEM). A double Fourier series is adopted to express the obtained magnetic flux density by analytical formulas. The coefficients of the analytical expressions are determined by a least mean error with a curve fitting technique and an optimization algorithm. Based on the electromagnetic theory and the Maxwell equations, the eddy-current losses are obtained by the analytical formulas. The validation of this method is verified by TEAM Problem 21 (Model B). The calculation results are in good agreement with the measured results. Then, it could be extended to calculate the eddy-current losses in the metal structural parts of the power transformer. |
| Databáze: | OpenAIRE |
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