NDLI: Using combined characteristics to identify inrush current and internal fault current of traction transformer

Content Provider	IEEE Xplore Digital Library
Author	Xingjun Tian Xiaqing Li Yunhua Li
Copyright Year	2011
Description	Author affiliation: School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China (Xingjun Tian; Yunhua Li) \|\| College of Information Engineering, Beijing Institute of Petrochemical, Technology, Beijing, China (Xiaqing Li)
Abstract	Due to weakness of transient second harmonic for large capacity traction transformers, traditional methods of its differential protection are faced with great challenge. For the characteristics that inrush current waveform has dead zone and peak wave, while the internal fault current waveform remains fundamental frequency sine wave, a new approach to identify inrush current and internal fault current of traction power transformer based on three-phase differential current combined characteristics of skewness and kurtosis is presented in this paper. Firstly, according to statistics theory of skewness and kurtosis and the cycle characteristics of sine wave, the data window width of differential current waveform is set and the algorithms of skewness and kurtosis are designed. Secondly, through the definition of skewness and kurtosis combination characteristics of three-phase differential current, new fault criteria are constructed in paper. Finally, it is proved that the new protection methods adopted waveform parameter identification principle that not only has features of clear principles, simple calculation, easy-to-project implementation, but also can quickly and correctly identify the fault current and inrush current in experiment.
Starting Page	1948
Ending Page	1952
File Size	276512
Page Count	5
File Format	PDF
ISBN	9781424487547
e-ISBN	9781424487561
e-ISBN	9781424487554
DOI	10.1109/ICIEA.2011.5975911
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surges Surge protection Circuit faults Fault currents Power transformers Switches Eigenvalues and eigenfunctions skewness traction transformer inrush current internal fault current kurtosis
Content Type	Text
Resource Type	Article

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