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

Volume

28

Issue

6

fYear

2012

Firstpage

45

Lastpage

56

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;

fLanguage

English

Journal_Title

Electrical Insulation Magazine, IEEE

Publisher

ieee

ISSN

0883-7554

Type

jour

DOI

10.1109/MEI.2012.6340524

Filename

6340524