Artículo
Methodology for Fast Calculation of Impedance Matrix of Power Transformers for High Frequency Transient Studies
Fecha de publicación:
10/2022
Editorial:
Institute of Electrical and Electronics Engineers
Revista:
IEEE Transactions on Power Delivery
ISSN:
0885-8977
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Power transformers are exposed to a variety of disturbances that may jeopardize their lifespan and the safe operation of the power system. The transient behavior of the transformer can be assessed by means of white-box models. The main prerequisite for the development of the white-box model is the frequency-dependent impedance matrix of the transformer. The main obstacle that restricts the use of white-box models at industrial level lies in the computation of the impedance matrix, since this calculation requires magnetic-field numerical simulations, which demand disproportionate calculation times when performed with traditional techniques such as the finite element method (FEM). That is why this paper proposes a new methodology for the fast calculation of the frequency-dependent impedance matrix of power transformers, which produces matrices suitable for the development of accurate white-box models. The proposed methodology was validated on a real 50 MVA transformer. Two white-box models were elaborated, one from the impedance matrix calculated with the proposed method and other using the matrix obtained with FEM. Excellent agreement was found between the transient response measurements and the response obtained with both models, however the proposed method reported a drastic reduction in computation time compared to FEM.
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Articulos(IEE)
Articulos de INSTITUTO DE ENERGIA ELECTRICA
Articulos de INSTITUTO DE ENERGIA ELECTRICA
Citación
Diaz, Guillermo A.; Mombello, Enrique Esteban; Pérez, Jhon G.; Hoidalen, Hans K.; Methodology for Fast Calculation of Impedance Matrix of Power Transformers for High Frequency Transient Studies; Institute of Electrical and Electronics Engineers; IEEE Transactions on Power Delivery; 38; 2; 10-2022; 1148-1158
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