Efficient Synchronization Stability Metrics for Fault Clearing

TL;DR

This paper presents a fast, optimization-based direct method for assessing the stability of power systems during faults, considering relay actions and unstable equilibria, aiming to improve screening efficiency.

Contribution

It introduces a novel, computationally-efficient optimization approach using cutting plane techniques for stability assessment, incorporating relay effects and potential constraints.

Findings

Provides rapid screening of dynamical security for large fault scenarios

Offers a conservative but flexible stability metric

Leverages optimization to include additional constraints

Abstract

Direct methods can provide rapid screening of the dynamical security of large numbers fault and contingency scenarios by avoiding extensive time simulation. We introduce a computationally-efficient direct method based on optimization that leverages efficient cutting plane techniques. The method considers both unstable equilibrium points and the effects of additional relay tripping on dynamical security\cite{01SH}. Similar to other direct methods, our approach yields conservative results for dynamical security, however, the optimization formulation potentially lends itself to the inclusion of additional constraints to reduce this conservatism.