active power interchange, multi-area networks, optimal power flow, stability analysis, small disturbance
Abstract
Large power networks are generally divided in areas through which the power is transferred. Therefore, the determination of power flow solutions constrained by area interchange limits is important, since it allows to estimate the maximum amount of energy that can be interchanged under safe conditions. This work is focused on the study of the active power interchange in a multi-area electrical network, by adopting a procedure based on two steps: (i) the use of Optimal Power Flow (OPF) models to determine steady state power flow solutions taking into account the power interchange, and (ii) the assessment of these solutions from the point of view of Small Signal Stability. Numerical results obtained with a 68-bus power system illustrate the main features of the proposed approach.
