Novel indicator of transmission line towers backflashover performance (CROSBI ID 650065)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Sarajcev, Petar ; Jakus, Damir ; Vasilj, Josip
engleski
Novel indicator of transmission line towers backflashover performance
Transmission line (TL) backflashover (BF) performance is traditionally ascertained using a single number, the backflashover rate (BFR), which is measured in number of BF events per 100 km-years. This paper aims at presenting a novel indicator for measuring performance of high- voltage TL tower's ability to tolerate direct lightning strikes without provoking a BF event. This indicator is also a single number, which can be computed for any TL tower (by means of EMTP simulations) and measures, in a novel way, its tolerance against BF events. It is given in terms of the risk of the BF occurrence, which means it is statistical in nature and depends on the total sum of conditions governing the BF events. The BF risk, as an indicator, is obtained from the probability density function of the shield wire(s) incident lightning currents and the cumulative distribution function of the BF currents statistical distribution. Hence, it merges complete probabilities of obtaining lightning currents striking a tower with probabilities of those currents provoking a BF events on that tower. This novel risk-based indicator can be related to the price of that risk and the associated investment costs, enabling the cost-effective optimisation solutions to the problems of TL arrester applications and station insulation coordination design.
Backflashover ; EGM ; EMTP ; Gaussian Copula ; Lightning ; Risk ; Transmission line
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Podaci o prilogu
18-1-18-6.
2017.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of the International conference on power system transients (IPST2017)
Correia de Barros, M. T. ; Ametani, A.
Seoul:
Podaci o skupu
International conference on power system transients (IPST2017)
predavanje
26.06.2017-29.06.2017
Seoul, Republika Koreja