Journal ArticleDOI
Transformer model for high frequencies
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TLDR
In this paper, a method for the development of a high-frequency transformer model for use in an electromagnetic transient program (EMTP) is discussed, and the results are used to calculate the transfer and admittance functions.Abstract:
A method for the development of a high-frequency transformer model for use in an electromagnetic transient program (EMTP) is discussed. A transformer to be modeled is measured, and the results are used to calculate the transfer and admittance functions. Modal analysis is used to determine a no-load network model that can be used in the EMTP. Results for a 400 kVA transformer are presented. >read more
Citations
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Journal ArticleDOI
Transfer function method to diagnose axial displacement and radial deformation of transformer windings
TL;DR: In this article, a transfer function method is presented as a tool to detect axial displacement and radial deformation of transformer windings using two test transformers and detailed mathematical models were developed for the test objects and a comparison was carried out between measured and calculated results.
Journal ArticleDOI
Complete transformer model for electromagnetic transients
F. de Leon,Adam Semlyen +1 more
TL;DR: In this paper, a complete, three phase transformer model for the calculation of electromagnetic transients is presented, which consists of a set of state equations solved with the trapezoidal rule of integration in order to obtain an equivalent Norton circuit at the transformer terminals.
Journal ArticleDOI
A high frequency transformer model for the EMTP
TL;DR: In this paper, a model to simulate the high-frequency behavior of a power transformer is presented based on the frequency characteristics of the transformer admittance matrix between its terminals over a given range of frequencies.
Journal ArticleDOI
Wide band modeling of power transformers
TL;DR: In this article, a linear wide band frequency-dependent black box model of a two-winding power transformer was obtained for the purpose of calculation of electromagnetic transients in power systems.
Journal ArticleDOI
On waveform distortion in the frequency range of 2 kHz–150 kHz—Review and research challenges
Sarah K. Ronnberg,Math Bollen,Hortensia Amaris,Gary W. Chang,Irene Yu-Hua Gu,Łukasz Hubert Kocewiak,Jan Meyer,Magnus Olofsson,Paulo F. Ribeiro,Jan Desmet +9 more
TL;DR: An overview of the state-of-the-art concerning these so-called supraharmonics, and noticeably indicates the research challenges associated with waveform distortion in this frequency range.
References
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Journal ArticleDOI
Effective measurements using digital signal analysis
TL;DR: The use of correlation, transfer, and coherence functions in obtaining measurements that are unambiguous and quantitative and can attach to a given aspect of the system being measured is discussed.
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