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Analysis of high‐frequency oscillations in voltage transformers
Author(s) -
Shibuya Yoshikazu,
Wada Kotaro,
Muto Hirotaka
Publication year - 2008
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20643
Subject(s) - transformer , frequency domain , electrical engineering , voltage , fast fourier transform , equivalent circuit , oscillation (cell signaling) , frequency analysis , engineering , electronic engineering , high voltage , physics , computer science , acoustics , mathematics , mathematical analysis , algorithm , chemistry , biochemistry
High‐frequency oscillations in voltage transformers are analyzed by the FFT method, using an equivalent lumped circuit. Such an analysis has been regarded as difficult because the transformers used in high‐voltage distribution systems have a large number of turns. The constants of the equivalent circuit are evaluated on a turn‐to‐turn basis. The frequency domain analysis is followed by time domain analysis using the FFT technique. Both characteristics are verified by an experiment on a 6.6‐kV voltage transformer. The nature of the high‐frequency oscillation is shown for a simpler model. It is found that the interlayer voltage becomes highest at the entrance to the incoming surge. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 163(1): 8–15, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20643