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In this paper, we present a hybrid algorithm for electrical fault location based on the traveling wave theory. The temporal location of fault points and the first reflected waves has been determined with continuous wavelet transforms (CWT) and concepts of extreme values, respectively. The analyzed signals were created by the software ATPDraw considering parameters of a real high voltage line situated between the cities of Pelotas and Candiota, both in the state of Rio Grande do Sul. Phase-to-ground faults for different transmission line lengths, incidence angles, and fault resistances have been analyzed. The results showed the efficiency of this type of algorithm, exhibiting low relative errors, mainly for nonzero incident angles.

Localização de Faltas em Linhas de Transmissão Através de Transformada de Wavelet Contínua, Pontos de Extremo e Teoria de Ondas Viajantes