Algorithm using Discrete Wavelet Transform to Power Transformers Protection

被引：0

作者：

Marques, Jeferson Prates ^{[1
]}

Oliveira, Aecio ^{[1
]}

Cardoso Junior, Ghendy ^{[1
]}

机构：

[1] Univ Fed Santa Maria, Santa Maria, RS, Brazil

来源：

2013 48TH INTERNATIONAL UNIVERSITIES' POWER ENGINEERING CONFERENCE (UPEC) | 2013年

关键词：

Power Transformer; Differential Protection; Inrush Current; Discrete Wavelet Transform; CLASSIFICATION;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

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.

引用

页数：5

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