Transient Stability Assessment Using Individual Machine Equal Area Criterion Part II: Stability Margin

TL;DR

This paper introduces a method for assessing transient stability margins of individual machines within a power system, emphasizing the importance of critical machine analysis and comparing it with traditional global approaches.

Contribution

It proposes a novel approach to evaluate system stability margins focusing on individual critical machines, including the concept of non-global stability margin, and compares it with classic methods.

Findings

The method effectively identifies critical stability margins of individual machines.

The approach provides insights into system stability from a machine-specific perspective.

Comparisons show advantages over traditional global stability assessment methods.

Abstract

In the second part of this two-paper series, the stability margin of a critical machine and that of the system are first proposed, and then the concept of non-global stability margin is illustrated. Based on the crucial statuses of the leading unstable critical machine and the most severely disturbed critical machine, the critical stability of the system from the perspective of an individual machine is analyzed. In the end of this paper, comparisons between the proposed method and classic global methods are demonstrated.