Title :
Gassing behavior of various alternative insulating liquids under thermal and electrical stress
Author :
Jovalekic, M. ; Vukovic, D. ; Tenbohlen, S.
Author_Institution :
Inst. of Power Transm. & High Voltage Technol. (IEH), Univ. of Stuttgart, Stuttgart, Germany
Abstract :
Dissolved gas in oil analysis (DGA) has been used for many years successfully for diagnosis and condition monitoring of mineral oil filled transformers. Due to the usage of alternative dielectric liquids, for example natural and synthetic esters, it is necessary to investigate if and how this diagnostic method can be applied to these insulating systems. This contribution presents the gassing behavior of different insulating liquids from experiments, which represent electrical and thermal faults. Also the suitability of existing mineral oil interpretation methods for DGA is considered. One mainly investigated fluid is Envirotemp FR3™. Where possible the amount and relation of gases are compared to mineral oil and other synthetic esters´ gassing behavior.
Keywords :
condition monitoring; dielectric liquids; electrical faults; minerals; organic compounds; thermal stresses; transformer oil; Envirotemp FR3; alternative dielectric liquids; alternative insulating liquids; condition monitoring; dissolved gas in oil analysis; electrical faults; electrical stress; gassing behavior; mineral oil filled transformers; natural esters; synthetic esters; thermal faults; thermal stress; Discharges (electric); Electrodes; Hydrogen; Minerals; Oils; Partial discharges; Transformer oil; dissolved gas analysis; natural ester;
Conference_Titel :
Electrical Insulation (ISEI), Conference Record of the 2012 IEEE International Symposium on
Conference_Location :
San Juan, PR
Print_ISBN :
978-1-4673-0488-7
Electronic_ISBN :
1089-084X
DOI :
10.1109/ELINSL.2012.6251517
