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

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. © 2014 xiaowei wang et al.