Determinación del margen de estabilidad angular de sistemas eléctricos de potencia considerando contingencias N-1

Abstract

This article proposes a heuristic methodology to determine the angular stability margin of electrical power systems considering N-1 contingencies, with the aim of improving the operating and safety conditions of electrical power systems, in addition to knowing the limits of stable or synchronous operation after the electrical system has suffered a disturbance, thus this study allows to guarantee adequate control actions against N-1 contingencies. For this study, contingencies have been considered in the transmission lines and also in the loads of the system, in such a way that several possible scenarios have been evaluated to determine the angular stability margin. The methodology and formulation of the problem can be applied to any study model of multi-machine electrical systems that does not include PSS over generation units. This estimation was carried out on the 9 bus IEEE test model, where it was possible to quantify the angular variation in the time domain, whose calculations could also be verified in the simulations and in this way it was possible to demonstrate the validity of the proposed method, which one allowed calculating the stability margin defined by 0º 83º    .