New Method to Identify Sympathetic Inrush in Transformer Based on Hilbert Huang Transform

Sympathetic inrush may cause the mal-operation of differential protection. Aiming at this problem, based on the characteristic that sympathetic inrush contains a lot of aperiodic component and high harmonics, this paper proposes to use Hilbert Huang transform to identify sympathetic inrush. Firstly,...

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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 229-231; pp. 863 - 867
Main Authors Gong, Mao Fa, Li, Lan Bing, Xia, Wen Hua, Li, Guo Liang, Bai, Xing Zhen
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 29.11.2012
Subjects
Hilbert-Huang Transform (HHT)
Sympathetic Inrush
Transformer
Differential Protection
Internal Fault Current
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Summary:Sympathetic inrush may cause the mal-operation of differential protection. Aiming at this problem, based on the characteristic that sympathetic inrush contains a lot of aperiodic component and high harmonics, this paper proposes to use Hilbert Huang transform to identify sympathetic inrush. Firstly, the mathematical model of sympathetic inrush is established to analyze its characteristic. Then Hilbert transform is used to obtain harmonic contents of sympathetic inrush and internal fault current. According to the proportion of fundamental to current, sympathetic current can be identified and differential protection can be blocked. The simulation results show that this method has better reliability and sensitivity than the second harmonic restraint scheme. Besides, it has a good ability against TA saturation.
Bibliography:Selected, peer reviewed papers from the 4th International Conference on Mechanical and Electrical Technology (ICMET 2012), July 24-26, 2012, Kuala Lumpur, Malaysia
ISBN:9783037855102
303785510X
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.229-231.863