Correlation of hydrogen generation with sparking discharges in a mineral insulating oil

Dissolved gas analysis (DGA) of transformer oil is one of the key methods of assessing transformer health [1]. Transformers operate under multiple stresses, e.g., thermal, electrical, and mechanical. The hydrocarbon molecules of transformer oils can be degraded into combustible and incombustible gas...

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Bibliographic Details
Published in:IEEE electrical insulation magazine 2018-05, Vol.34 (3), p.7-12
Main Authors: Xiang, J., Zhou, X. Y., Liu, Q., Wang, Z. D., Hinshaw, J., Mavrommatis, P.
Format: Magazinearticle
Language:English
Subjects:
Acetylene
Discharges (electric)
Dissolved gas analysis
Flammability
Gas analysis
Hydrocarbons
Hydrogen
Hydrogen production
Hydrogen storage
mineral oil
Minerals
Natural gas
Oil insulation
Oils
Power transformer insulation
sparking discharge
Sparks
Stresses
Thermal stresses
Transformers
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Summary:Dissolved gas analysis (DGA) of transformer oil is one of the key methods of assessing transformer health [1]. Transformers operate under multiple stresses, e.g., thermal, electrical, and mechanical. The hydrocarbon molecules of transformer oils can be degraded into combustible and incombustible gases under high thermal and electrical stresses, particularly under fault conditions. Different generated gases correspond to specific fault types and levels, e.g., hydrogen is the primary indicator of corona partial discharge, and acetylene is the primary indicator of sparking discharge and high-energy breakdown [2], [3]. DGA technology is therefore widely used to reveal incipient transformer faults by measuring the concentration of fault gases in the transformer oil.
ISSN:0883-7554
1558-4402
DOI:10.1109/MEI.2018.8345356