VOLTAGE STABILITY MODELING AND REAL-TIME MONITORING USING EXPERT-SYSTEM FOR OPERATION ASSISTANCE

This paper describes a prototype expert system to determine a viable v oltage stability control scheme, A new model for generator bus for rea ching their limits of reactive power output is presented; This expert system is designed to assist the power system operator in taking the m ost appropriate VAR control action in a timely fashion, Sensitivity of a fast voltage stability indicator is used to correct voltage stabili ty limit violations. Results of tests conducted on the AEP57 bus and 1 18 bus IEEE test systems, are presented and discussed.