Wavelet Transform Based Discrimination Between Inrush and Internal Fault of Indirect Symmetrical Phase Shift Transformer

被引：0

作者：

Bhasker, Shailendra Kumar ^{[1
]}

Tripathy, Manoj ^{[1
]}

Kumar, Vishal ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Elect Engn, Roorkee 247667, Uttar Pradesh, India

来源：

2014 IEEE PES GENERAL MEETING - CONFERENCE & EXPOSITION | 2014年

关键词：

Differential protection; Indirect Symmetrical Phase Shift Transformer; Internal fault current; Magnetizing inrush current; Wavelet transform; DIFFERENTIAL PROTECTION; RELAY;

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：

The non-sinusoidal inrush current has high magnitude and hence the discrimination from the other operating conditions such as internal faults becomes difficult in the protection of a power transformer. This paper proposes an effective method based on wavelet transform for the differentiation between inrush current and internal fault current in indirect symmetrical phase shift transformer (ISPST). Conventional Parseval's theorem has been used to calculate the wavelet energy of the differential current and a suitable threshold is decided for the discrimination between inrush and internal fault condition of ISPST. Different types of internal fault and inrush current conditions under a wide range of switching angle have been considered for the verification of the proposed method in the present simulation study. PSCAD/EMTDC has been utilized as simulation plateform.

引用

页数：5

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