Identification of critical cluster in transient stability study using line potential energy method

The identification of critical clusters and vulnerable segments is of primary importance in the transient stability assessment. In this paper, the line potential energy method is used to derive a transient stability index which in turn is used for the identification of critical clusters of machines and the vulnerable segments of the network. Since only the post-fault trajectory is required, the proposed method is independent of system modeling and could be extended for multi-swing stability assessment. Case studies on the IEEE 17-generators and UK 20-generators systems validated that the proposed method is practical and effective