A Failure Diagnosis Method of Oil-Filled Transformer Using Expert System Based on Duval Triangle Method and IEC 60599
Hyeong-Jin Lee, Kwang-Hoon Yoon, Dong-Jin Kweon, Jae‐Chul Kim · The Transactions of The Korean Institute of Electrical Engineers · 2019
DGA(Dissolved Gas Analysis) is a reliable method for detection of fault in oil-filled transformer. Among all the available techniques, IEC 60599 and DTM(Duval Triangle Method) is widely used. Most DGAs, including IEC 60599 and DTM, diagnose failure in the transformer through gas composition ratio. If the gas composition ratio is not calculated properly, the failure in the transformer can not be accurately diagnosed. Also, conventional techniques are difficult to consider the operating characteristics of the transformer. This paper proposes failure diagnosis technique of a transformer using expert system. The expert system was created from fuzzy logic based on IEC 60599 and DTM. The effectiveness of the expert system was verified by using MATLAB.