Naslov
Analysis of Overvoltages on Power Transformer Recorded by Transient Overvoltage Monitoring System

Autori
Filipović-Grčić, Božidar ; Jurišić, Bruno ; Keitoue, Samir ; Murat, Ivan ; Filipović-Grčić, Dalibor ; Župan, Alan

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

Izvornik
5th International Colloquium "Transformer Research and Asset Management" / - Opatija : CIGRÉ, 2019, 1-9

Skup
5th International Colloquium on Transformer Research and Asset Management

Mjesto i datum
Opatija, Hrvatska, 09.10.2019. - 12.10.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Monitoring system ; Power transformer ; Lightning overvoltages ; Frequency spectrum ; Insulation

Sažetak
In this paper, an on-line transient overvoltage monitoring system (TOMS) for power transformers is used for measurement of overvoltages on the transformer bushing tap. The focus of the paper is on the analysis of transient overvoltages caused by lightning strikes recorded at the terminals of power transformer. Several recorded overvoltages are analyzed and their amplitudes and frequency spectrum are presented and compared with those referring to standard impulse voltages from IEC standard. Collected data include number, peak and duration of recorded transient overvoltages and can be used for the assessment of the transformer insulation condition and estimation of health index. Data recorded by TOMS are also of significant importance since the insulation system of power transformer and other equipment in the substation can be damaged by lightning or switching overvoltages.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA