Comparative Performance Study of Dissolved Gas Analysis (DGA) Methods for Identification of Faults in Power Transformer

Figure 1

(a) “Arcing in oil” fault identified in transformer “T-3” with 36% of C₂H₄ gas. (b) “Overheat of cellulose” fault identified in transformer “T-7” with 133% of CO gas. (c) “Overheat in oil” fault identified in transformer “T-13” with 66% of H₂ gas. (d) “Corona” fault identified in transformer “T-18” with 91% of C₂H₂.

(a)

(b)

(c)

(d)