Decision support system for substation operation

The authors describe a prototype for a hybrid expert system developed to provide advice to station operators in real time. The domain of this expert system is transmission planning as applied to real-time operation. It consists of symbolic and procedural modules that address a variety of electrical concerns at generating stations, including breaker thermal duties, breaker fault duties, and voltage-critical load buses. Once the system is invoked, the prevailing operating state is evaluated for static security-limit violations. If any violations are encouraged, the system searches its knowledge base for plausible plans to alleviate the problem.<>