Naslov
Elimination of Overshooting Effects and Suppression of Numerical Oscillations in Transformer Transient Calculations

Autori
Tokić, Amir ; Uglešić, Ivo

Izvornik
IEEE Transactions on Power Delivery (0885-8977) 23 (2008), 1; 243-251

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
backward differential formula (BDF) method; nonlinear inductance; numerical oscillations; overshooting; transformer; transients; trapezoidal rule

Sažetak
This paper presents an original method of modeling nonlinear elements, particularly acceptable in the calculation of low-frequency transformer transients. A way of generating the state matrix coefficients is described. An algorithm is developed for state variable calculations based on the hyper stable backward differentiation formulas (BDF) BDFp, p-th order. The advantages of developing an algorithm which enables elimination of overshooting effect, as well as the suppression of numerical oscillations in low-frequency transformer transient calculations, are presented. Also, the reasons for the existence of overshooting effects and numerical oscillations are identified when the transformer transients are calculated in a nodal formulation of equations based on the trapezoidal method. It is shown that an implemented equation conversion procedure and/or a stiff system equation are indeed causing numerical oscillations in transformer transient calculations.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA