Applications of computational electromagnetism in electric power engineering

Melgoza, E.; Escarela‐Perez, R.; Corona-Sanchez, Manuel A.

doi:10.1109/tdc-la.2016.7805676

Cited by 1 publication

(1 citation statement)

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“…This formulation is incorporated into our FE code FLD and has been compared with analytical and 3D FE solutions, obtaining great accuracy in all cases [18]. FLD is a set of computer programs and routines, developed by the authors, for the analysis of electromagnetic problems using the FE method, which is programmed in Fortran 95 [19]. Using a 2D FE model permits a large number of simulations in a much shorter time and without the computational cost of a 3D model.…”

Section: Study Cases and Discussionmentioning

confidence: 99%

Mathematical Calculation of Stray Losses in Transformer Tanks with a Stainless Steel Insert

et al. 2021

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At present it is claimed that all electrical energy systems operate with high values of efficiency and reliability. In electric power systems (EPS), electrical power and distribution transformers are responsible for transferring the electrical energy from power stations up to the load centers. Consequently, it is mandatory to design transformers that possess the highest efficiency and reliability possible. Considerable power losses and hotspots may exist in the bushing region of a transformer, where conductors pass through the tank. Most transformer tanks are made of low-carbon steel, for economical reasons, causing the induction of high eddy currents in the bushing regions. Using a non-magnetic insert in the transformer tank can reduce the eddy currents in the region and as a consequence avoid overheating. In this work, analytical formulations were developed to calculate the magnetic field distribution and the stray losses in the transformer region where bushings are mounted, considering a stainless steel insert (SSI) in the transformer tank. Previously, this problem had only been tackled with numerical models. Several cases were analyzed considering different non-magnetic insert sizes. Additionally, a numerical study using a two dimensional (2D) finite element (FE) axisymmetric model was carried out in order to validate the analytical results. The solved cases show a great concordance between models, obtaining relative errors between the solutions of less than two percent.

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Section: Study Cases and Discussionmentioning

confidence: 99%