Comparison of Methods for the Interpretation of Dissolved Gases in Soybean Based Natural Ester

In this work, the performance of several criteria for the interpretation of gases generated in soybean-based natural ester as a consequence of thermal and electrical faults are analyzed. For this purpose, a database of collected information from the specialized literature with contributions from various authors is used. The thermal faults that are analyzed are T1 and T2 type according to IEC 60599 classification. The electrical faults are partial discharges (PD) and arcs (D1/D2). The interpretation criteria of dissolved gases compared are the IEC ratios, Doernenburg ratios, Roger ratios, Duval triangle 1, Duval triangle 3 for soybean-based natural ester, Duval triangle 4, Duval triangle 6, and CIGRE ratios.