Aprimoramento de um método híbrido de localização de faltas em linhas de transmissão com dados de um terminal.

Abstract

Hybrid terminal fault location methods typically use functions based on fundamental compo- nents to create a search window that contains the fault point, and functions based on traveling

wave theory to detect the reflected wave from the short circuit. One of the challenges involv- ing these techniques is the way in which the search window is defined, since most of it is

empirically determined and the wave reflected from the fault point can be found beyond the limits of the window, causing estimation errors. Thus, this work proposes the improvement of a classic hybrid method reported in the literature, in which a new formulation to calculate the search window is presented. The proposed search window is based on the combined error of fault resistance and load current. Therefore, evaluations of the proposed method

and the classical method were carried out through short-circuit simulations in the Alterna- tive Transients Program (ATP). The proposed method presented a better performance for

the evaluated scenarios. In addition, an evaluation of the impact of the Bergeron and JMarti models on fault location techniques was carried out. For that, several one- and two-terminal fault location algorithms, based on fundamental components and traveling wave theory, were considered.