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A Fault Locator for Three-Terminal Lines Based on Wavelet Transform Applied to Synchronized Current and Voltage Signals

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3 Author(s)
da Silva, M. ; Dept. of Electr. Eng., Sao Paulo Univ. ; Oleskovicz, M. ; Coury, D.V.

This paper describes a fault location algorithm for three-terminal transmission lines based on wavelet transform (WT). In this work, the wavelet transform has been used to analyze the high frequency components of the current and/or voltage signals generated by a fault. This fault location method is based on the traveling wave theory, where, by the processing' of the current and/or voltage signals using WT, the propagation time between the fault point and the terminals can be determined. Consequently, the distance of the fault as well as the faulted leg. can be easily calculated. This proposal requires data synchronization, which can be made by GPS, and communication links amongst the teed feeders. The results obtained for the algorithm are promising and they demonstrate a highly satisfactory degree of accuracy and applicability of the proposed method

Published in:

Transmission & Distribution Conference and Exposition: Latin America, 2006. TDC '06. IEEE/PES

Date of Conference:

15-18 Aug. 2006

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