Title :
Fault gas generation in natural-ester fluid under localized thermal faults
Author :
Wang, Zhongdong ; Yi, Xiao ; Huang, Jinping ; Hinshaw, John V. ; Noakhes, John
Author_Institution :
Univ. of Manchester, Manchester, UK
Abstract :
In this article, the generation of fault gases in FR3 fluid was investigated under various thermal stresses using a sealed vessel with full fluid circulation, and the results were compared with Gemini X under similar conditions. The DGA measurements from an online dissolved-gas monitor were generally comparable with laboratory analysis. The FR3 is more thermally stable than Gemini X, as indicated by less free gas-bubble formation, less violent fluid convection, and less fault gas generation above 300°C.
Keywords :
bubbles; chemical analysis; organic compounds; power transformers; thermal power stations; thermal stresses; DGA measurements; FR3 fluid; dissolved-gas analysis; fault gas generation; full fluid circulation; gas-bubble formation; localized thermal faults; natural-ester fluid; online dissolved-gas monitor; sealed vessel; thermal stresses; violent fluid convection; Gas insulation; Generators; Heating; Power transformers; Temperature measurement; Thermal measurement; Duval triangle; dissolved-gas analysis; fault; gas generation; natural-ester oil; transformer; vegetable oil;
Journal_Title :
Electrical Insulation Magazine, IEEE
DOI :
10.1109/MEI.2012.6340524
