Naslov
Numerical Calculations of Three-Phase Transformer's Transients

Autori
Tokic, Amir ; Madžarević, Vlado ; Uglešić, Ivo

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
2003 IEEE Bologna PowerTech Proceedings / A. Borghetti, C. A. Nucci, M. Poalone - Bolonja : Institute of Electrical and Electronics Engineers (IEEE), 2003

Skup
2003 IEEE Bologna PowerTech

Mjesto i datum
Bologna, Italija, 23.06.2003. - 26.06.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Inrush currents; ferroresonance; modeling; state space methods; stiff differential equations; transformers; transient analysis

Sažetak
A three-phase, two-winding transformer&#8217 ; s model is presented in the paper. The triplex core configuration is assumed in the transformer&#8217 ; s model. Nonlinear magnetizing curves are piecewise linearized. Input winding capacitances can be lumped to the transformer&#8217 ; s terminals. A stiff differential system in state space, describing transformer&#8217 ; s transient behavior, is solved by the L-stable backward differentiation formulas numerical rule. BDF compared to trapezoidal rule shows better stability properties. A computer program is developed for generation of variable state waveforms. The developed program is suitable for simulations of low-frequency three-phase transformer transients such as inrush currents and ferroresonance. Results of the developed program are compared to MATLAB/Power System Blockset results.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA