The application of fuzzy mathematics to transformer diagnosis expert system
Qualitative diagnosis method is used to analyze test data in transformer fault diagnosis expert system basically. But this usually cause misjudge fault that near threshold. In this paper, fuzzy mathematics theory is used to process DGA data and electrical tests data. IEC three-ratio fuzzy codes are calculated and the fuzzy membership degrees of electrical tests data are determined. A Comprehensive reasoning mechanism is built based on fuzzy mathematics. Finally, an example is given to prove the accuracy of diagnosis.