Transformer Fault Diagnosis Tool
A combined artificial neural network and expert system software tool (ANNEPS) is developed for transformer fault diagnosis using dissolved gas-in-oil analysis (DGA). ANNEPS takes advantage of the inherent positive features of each method and offers a further refinement of present techniques. The knowledge base of its expert system (EPS) is derived from IEEE and IEC DGA standards and expert experiences to include as many known diagnosis rules as possible. The combination of the ANN and EPS outputs has an optimization mechanism to ensure high diagnosis accuracy for all fault types. Test results show that the system has 95% or better accuracy. This tool is intended to be used as an automated processing engine to generate diagnosis results from online DGA equipments such as the TrueGas units.
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