Transportation Characteristics of Fault Characteristic Gases in Transformer Oil

Dissolved Gas Analysis (DGA) is a critical method for transformer fault diagnosis. However, the effective identification of internal faults in transformers is challenging due to the lack of a clear correspondence between the limited information from DGA sensors and the complex gas diffusion patterns within the transformer. Therefore, this paper conducted experimental research on the transmission characteristics of H<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>, CH<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf>, and CO in stagnant oil, yielding key parameters such as gas solubility. The study reveals that the gas transport process in stagnant oil comprises three distinct stages. The gases exhibit a dual diffusion characteristic: centrifugal diffusion (from the center to the periphery) and vertical diffusion. This research provides support for fault tracing in DGA and the optimization of oil sampling locations.