Naslov
Interruption of small, medium-voltage transformer current with a vacuum circuit breaker

Autori
Xemard, Alain ; Jurišić, Bruno ; Rioual, Michel ; Olivier, Arthur ; Selin, Eric

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

Izvornik
Proceedings of the International Conference on Power Systems Transients - IPST, Perpignan, France, 16th – 20th June 2019 / Dennetière, Sébastien - Perpignan : IPST, 2019, 1-6

Skup
International Conference on Power Systems Transients (IPST 2019)

Mjesto i datum
Perpignan, Francuska, 17.06.2019. - 20.06.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
EMTP-like software program, vacuum circuit breaker, current chopping, high frequency transformer model, voltage escalation, insulation coordination

Sažetak
Vacuum circuit breakers are known to potentially cause voltage escalation when interrupting small currents. Consequently, their installation in electrical systems may require the use of specific means aiming at reducing overvoltages. In this paper, the subject is explored in a configuration of an industrial plant. A medium-voltage transformer is connected to the electrical feeding system using a cable equipped with a breaker on the opposite terminal. The risk of voltage escalation is studied when the transformer loaded with a small inductive load is switched off. The study is conducted with an EMTP-like software program ; a detailed high-frequency model of the transformer is used as well as a VCB model able to represent current chopping and restriking. The protection provided by surge arresters and a filter is also studied

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA