Application of modified modal theory in the modelling of practical transformers

Author

Wilcox, D.J. ; Hurley, W.G. ; McHale, T.P. ; Conlon, M.

Author_Institution

Fac. of Eng., Univ. Coll., Galway, Ireland

Volume

139

Issue

6

fYear

1992

fDate

11/1/1992 12:00:00 AM

Firstpage

513

Lastpage

520

Abstract

The authors discuss validating a new form of transformer model aimed at efficient and accurate representation of power transformers in the calculation of electromagnetic transients arising under service and test conditions, where the duration of interest may be as short as tens of microseconds or as long as 5 ms or more. The principal concern is to confirm that modal models, based on a modified theory of modal analysis, retain their efficient structure when proper account is taken of the effects of transient-flux penetration into a practical core, and consequent frequency dependence of inductive and resistive parameters. this is done by modelling representative test windings on a commercial laminated core and comparing computed results with test results

Keywords

power transformers; transformer cores; transformer windings; transients; core; electromagnetic transients; frequency dependence; inductive parameters; laminated core; modelling; modified modal theory; power transformers; resistive parameters; service conditions; test conditions; transient-flux penetration; windings;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings C

Publisher

iet

ISSN

0143-7046

Type

jour

Filename

173256