Parameter estimation of a transformer with saturation using inrush measurements |
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Authors: | S. Bogarra A. Font I. Candela J. Pedra |
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Affiliation: | 1. Department of Electrical Engineering, ETSEIT-UPC, Colom 1, 08222 Terrassa, Spain;2. Department of Electrical Engineering, ETSEIB-UPC, Av. Diagonal 647, 08028 Barcelona, Spain |
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Abstract: | This paper presents a method to compute the parameters of a transformer model with saturation using the voltage and current waveforms of an inrush test and a no-load test. The transformer is modeled with their electric and magnetic equivalent circuits and a single-valued function that characterizes its non-linear magnetic behavior. A 3-kVA single-phase transformer and a 5-kVA three-phase three-legged transformer have been tested in the laboratory. The method to obtain the parameters of the non-linear flux–current relation that characterize the saturation has been described in the paper. The analytical function used to adjust the experimental measurements fits them very well. |
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Keywords: | Transformer modeling Parameter estimation Inrush current |
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