Modeling of Transformer Windings Under Very Fast Transient Overvoltages

To calculate the overvoltages in transformer windings under very fast transient overvoltages (VFTOs) generated by switching operations in gas-insulated substation (GIS), a single-input and multiple-output circuit model, which is based on a multiconductor transmission line (MTL) model, is presented i...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2006-11, Vol.48 (4), p.621-627
Main Authors: Liang, Guishu, Sun, Haifeng, Zhang, Xile, Cui, Xiang
Format: Article
Language:English
Subjects:
Applied sciences
Coils (windings)
Connection and protection apparatus
Electrical engineering. Electrical power engineering
Electrical power engineering
Electromagnetic compatibility
Exact sciences and technology
Fittings
Mathematical models
Overvoltage
Position (location)
Power networks and lines
Resonance
Resonant frequencies
Substations
Switching and signalling
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
transformer windings
Transformers
Transformers and inductors
vector fitting
very fast transient overvoltage (VFTO)
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Summary:To calculate the overvoltages in transformer windings under very fast transient overvoltages (VFTOs) generated by switching operations in gas-insulated substation (GIS), a single-input and multiple-output circuit model, which is based on a multiconductor transmission line (MTL) model, is presented in this paper. The procedure to determine the transfer function is deduced. Vector fitting and recursive convolution are used to calculate the time domain response. The resonant frequencies and the location of the resonance are determined by an analysis of the amplitude-frequency response characteristics. For validation, the calculated results are compared with the measurements on a transformer winding model, and the results are found to be satisfactory
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2006.884537