A modified wavelet-based fault classification technique

Abstract

This paper presents a new Wavelet-based fault classification technique that utilises the HF components confined to scale-8 (level-3) of Wavelet analysis of the three line currents in transmission line. Data window required for the algorithm is small (less than half power frequency cycle based on 1.0 kHz sampling rate). In the paper firstly the theoretical background is reported and briefly discussed in relation to reference 'IEEE, T&D Conf. (2001)'. Then, an extended study is conducted, and the proposed method is described in detail. Finally, some case studies are examined using the EMTP and MATLAB softwares in order to highlight the performance of the method. It is proved that the proposed technique is reliable and appropriate for real-time measurement algorithms and fault classification techniques. (C) 2002 Elsevier Science B.V. All rights reserved.