Naslov
Difficulties in high frequency transformer modelling

Autori
Jurišić, Bruno ; Xemard, Alain ; Uglešić, Ivo ; Paladian, Francoise ; Guuinic, Philippe

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

Izvornik
International Conference on Power Systems Transients (IPST2015) / - Cavtat, 2015

Skup
International Conference on Power Systems Transients (IPST2015)

Mjesto i datum
Cavtat, Hrvatska, 15.06.2015. - 18.06.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
“Black box” ; fitting ; passivity enforcement ; SemiDefinite Programming ; transformer modelling ; transmitted overvoltages ; EMTP-type ; admittance matrix ; FRA

Sažetak
Traditional transformer models available in EMTPlike software packages are not capable of representing transformer behavior during a transient state, which includes high frequencies, since they usually do not adequately take into account the transformer resonant behavior caused by its highly complicated design. Therefore, more complex “Black box” models are developed. Those models can be established without any knowledge on transformer geometry, based on the fitting of the measured admittance matrix of the transformer versus frequency. Unfortunately, the measurement and exploitation of a transformer’s admittance matrix are not straightforward. The existing fitting methods include solving non- convex constrained problem. Hence, it is not always easy to find an optimal solution of the problem. The difficulties, which can arise when building a high frequency “Black box” transformer model, are described in this paper together with a comparison of the performance and fitting accuracy of different numerical packages.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA