Power Losses Minimization considering Small-Signal Stability Constraint

Abstract

This paper proposes an optimization approach to solve the Small-Signal Constrained Optimal Power Flow (SSOPF) in transmission systems. The main goal is to minimize the active power losses taking the minimum damping ratio in closed-loop operation as a small-signal stability constraint. The Particle Swarm Optimization (PSO) is used and its individuals are evaluated through a conventional power flow tool and a modal analysis tool for small-signal stability assessment. Results are obtained for the New England test system and validated through time-domain simulations.