Title :
Study on Fault Line Selection based on Transient and Mathematical Morphology in Resonant Grounded System
Author :
Yilong, Qu ; Weipu, Tan ; Shuan, Cong ; Yihan, Yang
Author_Institution :
Dept. of Electr. Eng., North China Electr. Power Univ., Beijing
Abstract :
Based on morphological filter and correlation analysis, this paper presented a novel transient method for single-phase ground-fault line selection in resonant grounded network. Firstly an improved composite morphological filter with multiple-structure elements (SE) is designed to filtering the transient zero-sequence fault signals. Using it the meaningful information can be derived effectively from the signal interfered by noise. Secondly based on analyzing the transient characteristics of the lines´ zero-sequence current and the relationship between them, a novel method using correlation coefficient to determine the faulted line is presented. The results of the verification of proposed method by physical simulation and on- site actual fault data show that the proposed method is practicable.
Keywords :
fault diagnosis; power filters; power markets; power system faults; correlation analysis; correlation coefficient; mathematical morphology; morphological filter; multiple-structure elements; resonant grounded system; single-phase ground-fault line selection; transient morphology; transient zero-sequence fault signals; zero-sequence current; Coils; Filtering theory; Information filtering; Information filters; Morphology; Power system reliability; Power system transients; Resonance; Signal analysis; Transient analysis; correlation analysis; fault line selection; morphological filter; resonant grounded system;
Conference_Titel :
Power System Technology, 2006. PowerCon 2006. International Conference on
Conference_Location :
Chongqing
Print_ISBN :
1-4244-0110-0
Electronic_ISBN :
1-4244-0111-9
DOI :
10.1109/ICPST.2006.321436
