TRANSIENT STABILITY INDEX FROM CONVENTIONAL TIME-DOMAIN SIMULATION

This paper presents a practical and efficient method to incorporate en ergy analysis into conventional time domain transient stability simula tion for producing a first swing stability index. The proposed method is a variation of the PEBS approach, utilizing a numerical Transient E nergy Function and a pseudo-fault-on trajectory starting from the domi nant potential energy peak point of the postfault system trajectory. T he transient stability index not only provides additional insight into the stability studies, but also has the potential of speeding up the stability limit derivation process by reducing the number of program r uns.