A Software Implementation of the Duval Triangle Method

Monitoring and diagnosis of electrical equipment, in particular power transformers, has attracted considerable attention for many years. It is of great importance for the utilities to find the incipient faults in these transformers as early as possible. Dissolved gas analysis (DGA) is one of the most useful techniques to detect incipient faults in oil-filled power transformers. Various methods have been developed to interpret DGA results such as IEC ratio code, Rogers method and Duval triangle method. One of the most frequently used DGA methods is Duval triangular. It is a graphical method that allows one to follow the faults more easily and more precisely. In this paper a detailed implementation of Duval triangle method was presented for researchers and utilities interested in visualizing their own DGA results using a software program. The Java language is used for this software because of its growing importance in modern application development.