Naslov
Correlation between Lightning Impacts and Outages of Transmission Lines

Autori
Uglešić, Ivo ; Milardić, Viktor ; Franc, Bojan ; Betz, Hans-Dieter ; Piliškić, Silvija ; Nuhanović, Razim ; Tokić, Amir

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

Izvornik
CIGRE C4 Colloquium on Power Quality and Lightning / - , 2012, 1-10

Skup
CIGRE C4 Colloquium on Power Quality and Lightning

Mjesto i datum
Sarajevo, Bosna i Hercegovina, 13.05.2012. - 16.05.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Lightning ; Transmission and Distribution Line ; Outages ; Lightning Location System ; Time Correlation.

Sažetak
Lightning is the main cause of faults on overhead lines thus having a major impact on the quality of electricity supply. In order to improve the power quality, the correlation between lightning impacts measured by lightning location system (LLS) and events recorded by relay protection devices can be utilized. The paper describes examples of correlation that has been conducted for 110 kV overhead lines, with heightened number of power outages. The lightning density maps and other lightning data have been obtained for the area surrounding the overhead lines through a LLS that has been established in Croatia and Bosnia and Herzegovina, as part of the LINET network. The differences between the fault detection times of relay protection devices and the times of lightning stroke recorded by LLS have been analyzed. The most of the correlated events have a time difference between 10 ms and 20 ms. The results of time correlation of the faults and lightning strokes correspond to the laboratory measurement of the relay’s pick-up time, which were conducted for the relay protection device of the same type. The lightning stroke location determined by LLS could be used as information about the fault location on the overhead line, when the fault location function of the relay protection device is not available. This information contributes to identification of outage cause and reduces the reparation time, improving the power quality.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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