Three Dimensional Flux Calculation on a Three-Phase Transformer

Nahas, I. El; Szabados, B.; Findlay, R.D.; Poloujadoff, M.; Lee, S.; Burke, P. E.; Perco, Dan

doi:10.1109/mper.1986.5527863

Cited by 4 publications

(6 citation statements)

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“…The matrix form of the equations corresponding to the above solution domain is of the form of (5) [5], [6] where and are the nodal potential and nodal potential derivative values of the node , respectively.…”

Section: Mixed Fem-bemmentioning

confidence: 99%

Hybrid Numerical Techniques for Power Transformer Modeling: A Comparative Analysis Validated by Measurements

Tsili

Kladas

Georgilakis³

et al. 2004

IEEE Trans. Magn.

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Abstract-The paper presents alternative numerical techniques implemented in power transformer analysis and design focusing on the short circuit impedance evaluation. The proposed method adopts a particular reduced scalar potential formulation enabling a three-dimensional (3-D) magnetostatic problem solution. This method, requiring no source field calculation, in conjunction with a mixed finite-element/boundary-element technique, results in a very efficient 3-D numerical model for power transformer design office use. This model is used to develop an effective computational tool, enabling the accurate transformer characteristics prediction, thus increasing its reliability and reducing its production cost. The computed results of the proposed methodology are validated through measurements in the case of a three-phase wound core power transformer.

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Section: Mixed Fem-bemmentioning

confidence: 99%

Hybrid Numerical Techniques for Power Transformer Modeling: A Comparative Analysis Validated by Measurements

Tsili

Kladas

Georgilakis³

et al. 2004

IEEE Trans. Magn.

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“…We rely on a data matrix B(x,y) either coming from measured values in an experimental setup, or a flux simulation such as reported In [8). The An experiment was designed to corroborate the results described above.…”

Section: Development Of the Incident Fluxmentioning

confidence: 99%

“…In the application sought, there is heavy concentration of flux (usually at the ends of the field-producing coils [8)). Hence a refined grid is required to obtain sufficient accuracy for calculations.…”

Section: Eddy Current Lossesmentioning

confidence: 99%

“…Due to the size of limitations imposed by finite element methodology, the flux patterns obtainable are not sufficiently accurate for the purpose. In some cases two dimentional axisymmetry solutions are the only ones economically feasible, and consequently very limited (8). Hence loss calculations, dependent upon the difference calculations in fluxes, are grossly inaccurate using these methods.…”

mentioning

confidence: 99%

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A New Approach to Determine Eddy Current Losses in the Tank Walls of a Power Transformer

Szabados

Nahas

Sobki

et al. 1987

IEEE Trans. Power Delivery

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“…The systematic increase of computer efficiency along with the evolution of numerical methods of magnetic field simulation enable the detailed transformer magnetic field analysis with the use of low cost and widely popular computational systems. The finite element method is one of the numerical methods that have prevailed in the field analysis of three-dimensional configurations that comprise materials with non-linear characteristics, like transformers, and may be applied within reasonable time in an appropriate personal computer [9,10].…”

Section: Introductionmentioning

confidence: 99%