Switching overvoltages in a three-phase transformer

Author

Indulkar, C.S. ; Thomas, Mini Shaji ; Bijwe, P.R.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., New Delhi, India

fYear

1992

Firstpage

237

Abstract

Switching operations to energize or isolate a transformer result in voltages and currents of complex waveshapes in the transformer windings. The surges transferred to the coupled nonenergized windings when one winding of the transformer is energized are discussed. The transformer model considered is a complex three-phase model considering the various inductive and capacitive couplings and can handle a variety of primary, secondary and neutral connections. The multiwinding model is used in conjunction with the Fourier transform method to obtain the transient voltage waveform at the primary and secondary terminals and at different points in the windings

Keywords

Fourier transforms; overvoltage; power transformers; transformer windings; transients; Fourier transform method; capacitive couplings; complex waveshapes; coupled nonenergized windings; inductive couplings; multiwinding model; surges; switching overvoltages; three-phase transformer; transformer model; transformer windings; transient voltage waveform; Bismuth; Capacitors; Educational institutions; Fourier transforms; Isolation technology; Phase transformers; Surges; Transient response; Voltage transformers; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1992., Proceedings of the 35th Midwest Symposium on

Conference_Location

Washington, DC

Print_ISBN

0-7803-0510-8

Type

conf

DOI

10.1109/MWSCAS.1992.271391

Filename

271391