Approach to the maintenance of knowledge base by end-user: substation switching sequence support expert system (QUALTES)

The authors developed the expert system, QUALTES, to create the command table of stoppage operations for maintenance at a substation, and to verify it by simulation. The system was developed by using object-oriented programming and ATMS (assumption-based truth maintenance system). These techniques aided the development of portability. QUALTES consists of the distribution system and the kernel system. The distribution system is based on the first version of QUALTES. The kernel system is appended to generate each substation model which is used in the distribution system. The kernel system ensures that QUALTES can be used at any substation. The kernel system defines electrical connections with a graphical user-interface. Therefore, end-users can generate any substation model with QUALTES. The kernel system consists of two subsystems for definition by the end-user, the skeleton construction subsystem, and the editor construction subsystem. These two subsystems are described