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INFLUENCE OF WINDING CAPACITANCES TO GROUND MODELLING ON THE CALCULATION OF TRANSFERRED VOLTAGES IN POWER TRANSFORMER

Goran Plišić ; Končar Power Transformers Ltd
Kosjenka Capuder ; Končar Power Transformers Ltd

Sažetak

During voltage transients, the windings of a transformer are coupled by electric and magnetic
fields. To calculate the transients inside the transformer, a network model is typically used. The accuracy
of obtained calculation results depends mainly on this model in which the windings are lumped into R, L
and C circuit components. The windings are usually represented by discs, or groups of discs, with the
corresponding resistances, inductances (self and mutual) and capacitances (series and to the ground) [1].
In case of impulse voltage, wave’s steep front and consequently high frequency oscillations are the main
reason why capacitances modelling is of major importance for the calculation of voltage distribution in
winding and between windings.

Ključne riječi

power transformer; overvoltages; lightning; capacitances; model; 3D FEM

Hrčak ID:

199256

URI

https://hrcak.srce.hr/199256

Datum izdavanja:

15.8.2017.

Posjeta: 873 *