Fuzzy techniques for voltage control on the NGC system

This paper discusses some aspects of fuzzy systems theory as applied to the NGC power system problem of voltage-VAr control. A preliminary investigation is reported defining a prototype knowledge base structure, establishing an appropriate knowledge representation, describing the necessary software which was written interfacing internal software representing the system simulation (Fast AC Loadflow) and the intelligent expert system software (GENESIA supplied by EDF) and demonstrating fuzzy control applications by experimental runs based on heuristically derived sensitivity relationships.