Influence of secondary winding terminal conditions on impulse distribution in transformer windings

Author

Jayaram, S. ; Chandrasekahraiah, H.S.

Author_Institution

Dept. of Electr. Eng., Univ. of Western Ontario, London, Ont., Canada

fYear

1991

fDate

Sept. 28 1991-Oct. 4 1991

Firstpage

1610

Abstract

A simple computational method for the calculation of natural frequencies and transient voltage distribution in both primary and secondary transformer windings was developed. The equivalent circuits developed for different test conditions for transient analysis account for various inductive and capacitive couplings between various sections of the windings. The validity of the computational method was verified by comparison between the measurements and calculations on a model transformer. The influence of secondary winding termination on the measured natural frequencies in the case of a three phase winding model was studied. The natural frequencies measured for similar excitation of the primary and different terminal conditions of the secondary were significantly different, and the differences were as high as 300%.<>

Keywords

power transformers; transformer windings; transients; equivalent circuits; impulse distribution; natural frequencies; secondary winding terminal conditions; three phase winding; transformer windings; transient voltage distribution; Circuit testing; Equivalent circuits; Frequency; Low voltage; Phase transformers; Power system transients; Power transformer insulation; Surges; Transient analysis; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1991., Conference Record of the 1991 IEEE

Conference_Location

Dearborn, MI, USA

Print_ISBN

0-7803-0453-5

Type

conf

DOI

10.1109/IAS.1991.178076

Filename

178076