Transient stability index from conventional time domain simulation

This paper presents a practical and efficient method to incorporate energy analysis into conventional power system time domain transient stability simulation for producing a first swing stability index. The proposed method is a variation of the potential energy boundary source approach, utilizing a numerical transient energy function and a pseudo-fault-on trajectory starting from the dominant potential energy peak point of the postfault system trajectory. The 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 runs