An expert system for generating switching sequences at substations

An expert system, VIRGO, for planning switching sequences in substations has been developed. A substation model has been developed on a knowledge database, and, based on this model, the expertise of the operator has been described in terms of production rules. These rules must be layered as metarules to reflect the understanding of the domain expert. VIRGO comprises four functions: it makes specific commands by which any equipment involved should be operated; it makes a switching sequence table in accordance with these commands by reasoning from production rules: it converts the table into an easily readable format: and it simulates the substation model with the sequences on a color CRT screen. VIRGO has been implemented in the knowledge description language, KDL, on the VAX workstation.<>