Naslov
Statistical analysis of non-standard overvoltage waveforms measured at 220 kV terminals of a power transformer

Autori
Jurišić, Bruno ; Filipović-Grčić, Božidar ; Župan, Tomislav ; Levačić, Goran

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

Izvornik
International Conference on Power Systems Transients (IPST) / - , 2021, 1-6

Skup
International Conference on Power Systems Transients (IPST)

Mjesto i datum
Belo Horizonte, Brazil, 06.06.2021. - 10.06.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Non-Standard Overvoltages ; Lightning ; Power Transformer ; Statistical Analysis ; Genetic Algorithm

Sažetak
Power transformers are designed to withstand switching and lightning overvoltages which can occur in the power system. The knowledge about waveshapes of these events grows rapidly with the introduction of online transient monitoring systems. Consequently, it is important to compare standard test voltage impulses with the ones existing in the power system. In this paper, 123 measured overvoltages in 220 kV air-insulated substation are analyzed. The observed overvoltages are fitted using double exponential mathematical function. Function parameters are calculated using genetic algorithm. To compare measured signals with the standard ones, statistical analysis of their parameters is performed. Additionally, frequency domain severity factor is calculated for the observed signals.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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