DocumentCode :
675076
Title :
Algorithm using discrete wavelet transform to power transformers protection
Author :
Marques, Jeferson Prates ; Oliveira, Aecio ; Cardoso, Ghendy
fYear :
2013
fDate :
2-5 Sept. 2013
Firstpage :
1
Lastpage :
5
Abstract :
This paper presents a new algorithm for power transformers protection, based on monitoring the variation of the last samples of the detail coefficients, called detail signals, the first level of decomposition of DWT. In situations of inrush current the variation of the detail signals are close to zero, on the other hand, in case of an internal fault the detail signals have an abrupt variation. Based on these characteristics the proposed algorithm can identify and distinguish the situations of transients in power transformers, mainly situations of inrush current and internal faults. The proposed algorithm has been thoroughly tested for various operation scenarios, showing how the algorithm is fast and efficient in distinguishing the different situations of transient tested.
Keywords :
discrete wavelet transforms; power system faults; power transformer protection; DWT decomposition; discrete wavelet transform; inrush current; internal fault; power transformer protection; transient testing; Circuit faults; Discrete wavelet transforms; Power transformers; Surge protection; Surges; Transient analysis; Differential Protection; Discrete Wavelet Transform; Inrush Current; Power Transformer;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering Conference (UPEC), 2013 48th International Universities'
Conference_Location :
Dublin
Type :
conf
DOI :
10.1109/UPEC.2013.6714891
Filename :
6714891
Link To Document :
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