Naslov
Monitoring of transient overvoltages on the power transformers and shunt reactors – field experience in the Croatian power transmission system

Autori
Filipović-Grčić, Božidar ; Franc, Bojan ; Uglešić, Ivo ; Pavić, Ivica ; Keitoue Samir ; Murat, Ivan ; Ivanković, Igor

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

Izvornik
4th International Colloquium "Transformer Research and Asset Management", Pula, Croatia, May 10 – 12, 2017 / - Zagreb : CIGRÉ, 2017, 1-15

Skup
4th International Colloquium "Transformer Research and Asset Management"

Mjesto i datum
Pula, Hrvatska, 10.05.2017. - 12.05.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Transient overvoltage monitoring system ; lightning location system ; lightning and switching overvoltages ; power transformers ; shunt reactors ; EMTP-RV

Sažetak
Power transformers and shunt reactors may be subjected to various dielectric stresses such as lightning and switching overvoltages. Since the exposure of equipment to overvoltages during operation and the overvoltage amplitudes are usually unknow, an on-line overvoltage transient recorder is used with the ability to sample, analyze and store transients at transformer terminals in real-time. In this paper, transient overvoltage monitoring system is presented. Overvoltages are measured on the outside measurement terminal of the shunt reactor and transformer bushing. Field experience regarding the application of monitoring system in Croatia is described including different cases of lightning and switching overvoltages. Lightning overvoltages recorded by monitoring system are correlated with data from the lightning location system (LLS). Switching overvoltages recorded on the shunt reactor are compared with numerical simulations in EMTP-RV software. Collected data about overvoltage stresses can be used as the basis for the assessment of the transformer and shunt reactor insulation condition and estimation of health index.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

Napomena
Paper TLM-05

POVEZANOST RADA