Title :
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
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;
Conference_Titel :
Circuits and Systems, 1992., Proceedings of the 35th Midwest Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-0510-8
DOI :
10.1109/MWSCAS.1992.271391
