A case-based expert system for power system restoration

Power companies are arranging regular training sessions to keep their operators ready to face blackout events, and expert systems are playing an important role in achieving this goal. Conventional rule-based expert systems suffer from the conflict of rules in large systems. Conflict of rules also occurs during rule modifications. This paper describes a simple and flexible expert system using a case-based reasoning technique that can overcome the drawbacks of rule-based expert systems. An object-oriented graphical user interface is developed to assist and guide operators during restoration. The proposed solutions for possible blackout events are verified by mathematical analyses.