DocumentCode :
1396769
Title :
Application of vector fitting to state equation representation of transformers for simulation of electromagnetic transients
Author :
Gustavsen, Bjørn ; Semlyen, Adam
Author_Institution :
Dept. of Electr. Eng., Toronto Univ., Ont., Canada
Volume :
13
Issue :
3
fYear :
1998
fDate :
7/1/1998 12:00:00 AM
Firstpage :
834
Lastpage :
842
Abstract :
This paper presents an efficient methodology for transient modeling of power transformers based on measured or calculated frequency responses. The responses are approximated with rational functions using the method of vector fitting. The resulting model is dynamically stable since only negative poles are used, and input-output stability is assured by a novel adjusting procedure. The methodology is used to formulate two different transformer models: (1) a full phase domain model realized column-by-column, and (2) a model utilizing modal diagonalization. The application of the models is demonstrated for a 410 MVA generator step up transformer
Keywords :
frequency response; power transformers; transient analysis; 410 MVA; electromagnetic transients simulation; frequency responses; full phase domain model; generator step up transformer; input-output stability; modal diagonalization; negative poles; rational functions; state equation representation; transformers; transient modeling; vector fitting; Admittance; Computational modeling; Eigenvalues and eigenfunctions; Equations; Fitting; Frequency measurement; Function approximation; Power measurement; Power transformers; Stability;
fLanguage :
English
Journal_Title :
Power Delivery, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8977
Type :
jour
DOI :
10.1109/61.686981
Filename :
686981
Link To Document :
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