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Simulation and Measurement of Lightning-Impulse Voltage Distributions Over Transformer Windings

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8 Author(s)
Smajic, J. ; Univ. of Appl. Sci. of Eastern Switzerland, Rapperswil, Switzerland ; Steinmetz, T. ; Ruegg, M. ; Tanasic, Z.
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This paper presents: 1) a novel method for accurate high-frequency modeling of dry-type transformer windings based on magnetic and electric field simulations for parameter extraction of the detailed equivalent circuit of the entire winding system; 2) a method for fast and accurate transient solution of the circuit differential equations that describe the voltage distribution over the winding system; 3) an efficient, cheap, and nondestructive low-voltage measurement system based on a self-developed lightning-impulse generator; and 4) verification of the simulation results by comparison with measurement.

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Magnetics, IEEE Transactions on  (Volume:50 ,  Issue: 2 )