Naslov
Sensitive turn-to-turn fault protection for power transformers

Autori
Gajić, Zoran ; Brnčić, Ivo ; Hillström, Birger ; Ivanković, Igor

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

Izvornik
Cigré Study Committee B5 Colloquium and IEEE Power System Relaying Committee / De Mesmaeker, Ivan ; Hindle, Paul - Calgary : CIGRÉ, 2005

Skup
Joint Meetings of Cigré Study Committee B5 and IEEE Power System Relaying Committee, with the Study Committee B5 Colloquium

Mjesto i datum
Calgary, Kanada, 08.09.2005. - 16.09.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
power transformer; sensitive differential protection; turn-to-turn fault

Sažetak
Three most typical weaknesses of the analogue power transformer differential relays have been: 1. Long operating time in case of heavy internal faults followed by main CT saturation 2. Unwanted operations for external faults and transformer inrush 3. Bad sensitivity for low-level internal faults, such as winding turn-to-turn faults With the introduction of the numerical technology the first two problems could be handled in much better way [4]. However sensitivity for internal winding turn-to-turn faults did not improve much. This paper introduces the new protection principle, which will improve differential relay sensitivity for minor internal turn-to-turn faults. However, the first two classical disadvantages are as well efficiently removed by applying the solution described in the paper.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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