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Journal of Applied Mathematics
Volume 2014, Article ID 726205, 18 pages
http://dx.doi.org/10.1155/2014/726205
Research Article

Stepped Fault Line Selection Method Based on Spectral Kurtosis and Relative Energy Entropy of Small Current to Ground System

School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China

Received 9 April 2014; Revised 8 June 2014; Accepted 8 June 2014; Published 22 July 2014

Academic Editor: Hamid R. Karimi

Copyright © 2014 Xiaowei Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper proposes a stepped selection method based on spectral kurtosis relative energy entropy. Firstly, the length and type of window function are set; then when fault occurs, enter step 1: the polarity of first half-wave extremes is analyzed; if the ratios of extremes between neighboring lines are positive, the bus bar is the fault line, else, the SK relative energy entropies are calculated, and then enter step 2: if the obtained entropy multiple is bigger than the threshold or equal to the threshold, the overhead line of max entropy corresponding is the fault line, if not, enter step 3: the line of max entropy corresponding is the fault line. At last, the applicability of the proposed algorithm is presented, and the comparison results are discussed.