DIASE - Expert System Fault Diagnosis for Timisoara 220 kV Substation

The paper describes the DIASE (the acronym for "Diagnoza Incidentelor si Avariilor in Statiile Electrice" - substations events and faults diagnosis) expert system for Timisoara 220 kV substation. The purpose of DIASE is to offer explanations for and solutions to the substation\´s operators in the case of faulty phone link to the dispatcher. The diagnosis method uses reasoning based on rules inferred form the operation of the substation\´s primary equipment and main bus bar and autotransformer protections. DIASE\´s platform is the Prolog language. In the end, the paper presents some conclusions resulting from a DIASE offline test