Estudo do fluxo de carga considerando os limites de reativos das máquinas síncronas

Abstract

This work presents the study of nonlinear Load Flow for electric power systems using the Newton-Raphson Method. It’s shown the structuring of a MATLAB algorithm, entitled FLOBA. The algorithm calculates the Power Flow of a system of "n" bus-bars, using the method chosen, and considers the reactive power limits of the synchronous machines of the system. The "n" bars system is represented in detail with the parameters of electrical resistance, inductive reactance, capacitive susceptance, generators as positive power injections and loads as negative power injections, the limits of voltage in the bars and capacity constraints of the transmission lines are not considered. The reactive power limits from the synchronous machine capability curve are considered as input data. The FLOBA user, when executing the algorithm, becomes aware of the state of the network and, if it is the case, which generators of the system have exceeded the operational constraints. It is possible for the user to interacts with the algorithm in order to eliminates the reactive limits violation for the bars that exceeded the limit, if that is a feasible option by the system configuration. Test Systems calculations and simulations are presented, a satisfactory validation of the results were obtained with the implemented algorithm's calculations through the use of ANAREDE and SIMPOT programs.