37. savetovanje CIGRE Srbija (2025) SIGURNOST, STABILNOST, POUZDANOST I RESILIENCE ELEKTROENERGETSKOG SISTEMA MULTISEKTORSKO POVEZIVANJE U ENERGETICI I PRIVREDI – D1-01
AUTOR(I) / AUTHOR(S): Siniša Spremić
DOI: 10.46793/CIGRE37.D1.01
SAŽETAK / ABSTRACT:
In order to determine the ratio of fault gases in cases of overheating (thermal faults) of electrical equipment and devices filled with insulating liquids, overheating at certain temperatures was simulated in laboratory conditions with dissolved gas in oil analyses (hereinafter: DGA). Based on the ratio of gases obtained by overheating in laboratory conditions and empirically for thermal faults in real conditions in electrical equipment and devices based on detailed inspections, methods were created to recognize the type of thermal faults in electrical equipment. Overheating of insulating liquids in laboratory conditions in the examples shown is by using a heater immersed in the insulating liquid through which electric current flows and by using a furnace with independent heating of the vessel with the insulating liquid from outside. Both methods were considered and the possibilities, advantages and disadvantages were pointed out. The results of DGAs of oils subjected to overheating in laboratory conditions for several cases are presented and analyzed in detail. They include results for different types of insulating fluids (mineral oil, natural esters and oil derived from gas).
KLJUČNE REČI / KEYWORDS:
Thermal fault, Insulating liquid, Ratio of fault gases, Laboratory test
PROJEKAT / ACKNOWLEDGEMENT:
LITERATURA / REFERENCES:
- Jackelyn Aragόn Gόmez, 2014, Dissertation “Experimental Investigations on the Dissolved Gas Analysis Method (DGA) through Simulation of Electrical and Thermal Faults in Transformer Oil”, Institute für Angewandte Analytische Chemie Fakultät Chemie der Universität Duisburg-Essen
- X.F. Wang, Z.D. Wang, Q. Liu, Ch. Krause, P.W.R. Smith,D. Walker, 2015, „Dissolved gas analysis of a gas to liquid hydrocarbon transformaer oil under thermal faults”, The 19th International Symposium on High Voltage Engineering, Pilsen, Czech Republic, August, 23 – 28
- https://www.kanthal.com/en/products/material-datasheets/wire/resistance-heating-wire-and-resistance-wire/kanthal-a-1/ (pristupljeno 11.01.2023. godine)
- Wang, X. F., Wang, Z. D., Liu, Q., & Dyer, P., 2018, „Dissolved gas analysis of thermal faults in transformer liquids simulated using immersed heating method“, IEEE Transactions on Dielectrics and Electrical Insulation, 25(5), 1749- 1757
- M. Jovalekic, D. Vukovic, S. Tenbohlen, 2014, „Dissolved gas analysis of alternative dielectric fluids under thermal and electrical stress.“ in IEEE Conf. Dielectr. Liquids (ICDL), pp. 1-4
- https://www.isabellenhuette.de/fileadmin/Daten/Praezisionslegierungen/Datenblaetter_Widerstand/Englisch/RESISTHERM.pdf (pristupljeno 11.01.2023. godine)
- C. Beauchemin, 2017, “Understanding Dissolved Gas Analysis of Ester Fluids“, The international conference on power transformers – TRANSFORMER 17, Torun, 9-11 may 2017, pp. 93-112
- Dave Hanson, Kevin Li, Jorge Plascencia, John Luksich, Art Lemm, Clair Claiborne, Don Cherry, George Frimpong, Russell Martin, 2013, “Understanding Dissolved Gas Analysis of Ester Fluids: a Review of Gas Generated in Ester Fluid by Stray Gassing, Thermal Decomposition and Electrical Discharge”, Advanced Research Workshop on Transformers. 28 -30 October 2013. Baiona– Spain