DocumentCode :
3602348
Title :
Real-Time Detection of Transients Induced by High-Impedance Faults Based on the Boundary Wavelet Transform
Author :
Costa, Flavio B. ; Souza, B.A. ; Brito, N.S.D. ; Silva, J.A.C.B. ; Santos, W.C.
Author_Institution :
Sch. of Sci. & Technol., Fed. Univ. of Rio Grande do Norte, Natal, Brazil
Volume :
51
Issue :
6
fYear :
2015
Firstpage :
5312
Lastpage :
5323
Abstract :
The development of modern protection functions is a challenge in the emerging environment of smart grids because the current protection system technology still has several limitations, such as the reliable high-impedance fault (HIF) detection in multigrounded distribution networks, which poses a danger to the public when the protection system fails. This paper presents the wavelet coefficient energy with border distortions of a one-cycle sliding window designed for the real-time detection of transients induced by HIFs. By using the border distortions, the proposed wavelet-based methodology presents a reliable detection of transients generated by HIFs with no time delay and energy peaks scarcely affected by the choice of the mother wavelet. The signatures of different HIFs are presented in both time and wavelet domains. The performance of the proposed wavelet-based method was assessed with compact and long mother wavelets by using data from staged HIFs on an actual energized power system, taking into account different fault surfaces, as well as simulated HIFs. The proposed method presented a more reliable and accurate performance than other evaluated wavelet-based algorithms.
Keywords :
delays; fault diagnosis; power distribution faults; power system protection; power system transients; wavelet transforms; HIF detection; high-impedance faults; mother wavelets; multigrounded distribution networks; protection system technology; smart grids; time delay; transient detection; wavelet based methodology; wavelet coefficient energy; wavelet transform; Real-time systems; Steady-state; Transient analysis; Wavelet analysis; Wavelet domain; Wavelet transforms; High impedance faults; High-impedance faults (HIFs); power system protection; wavelet transform;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.2015.2434993
Filename :
7110357
Link To Document :
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