engleski

Lightning impulse voltage distribution over voltage transformer windings — Simulation and measurement

This paper presents a fast and precise method for the calculation of internal voltage transients over the voltage instrument transformer windings. Lumped circuit parameters of the transformer winding are calculated using self-developed solvers based on the boundary element method and integral equations approach. A detailed equivalent circuit of the transformer winding is solved in time domain. Test model of the voltage instrument transformer is constructed with a number of measurement points along the windings. Results of the calculation are in a good agreement with the measured voltages.

Voltage transformers ; Numerical simulation ; Electromagnetic transients ; Impulse testing ; Coils ; Internal overvoltages

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