Analysis of Very Fast Transients in Layer-Type Transformer Windings

This paper deals with the measurement, modeling, and simulation of very fast transient overvoltages in layer-type distribution transformer windings. Measurements were performed by applying a step impulse with 50-ns rise time on a single-phase test transformer equipped with measuring points along the...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2007-01, Vol.22 (1), p.238-247
Main Authors: Popov, M., van der Sluis, L., Smeets, R.P.P., Roldan, J.L.
Format: Article
Language:English
Subjects:
Applied sciences
Coils (windings)
Computation
Computational modeling
Electric potential
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Fourier analysis
high-frequency model
Impulse testing
Inductance
interturn voltages
Inverse
Overvoltage
Performance analysis
Performance evaluation
Power networks and lines
Substations
Surges
Time measurement
transformer
Transformers
Transformers and inductors
Transient analysis
Transmission line matrix methods
Transmission lines
very fast transients
Voltage
Windings
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Description
Summary:This paper deals with the measurement, modeling, and simulation of very fast transient overvoltages in layer-type distribution transformer windings. Measurements were performed by applying a step impulse with 50-ns rise time on a single-phase test transformer equipped with measuring points along the winding. Voltages along the transformer windings were computed by applying multiconductor transmission-line theory for transformer layers and turns. Interturn voltage analysis has also been performed. Computations are performed by applying an inductance matrix determined in two different ways; by making use of the inverse capacitance matrix and by making use of the well known Maxwell formulas. The modeling of the transformer and the computations are verified by measurements
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2006.881605