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Title: Identification of internal faults in power transformer using symmetrical components and park's plots
Authors: Ala S.
Tripathy, Manoj
Singh A.K.
Published in: Proceedings of 2009 International Conference on Power Systems, ICPS '09
Abstract: A new scheme to discriminate between internal fault current and inrush current of power transformer is presented in this paper. In the proposed method, space vector analysis of the differential signal and their time characteristic shapes in park's plane is used as a core classifier to discriminate between magnetizing inrush and internal fault of a power transformer. Conventionally, second harmonic component is commonly used for blocking differential relay in power transformer differential protection. A comparison of performance between the proposed method and the conventional harmonic restraint method is also discussed in this paper. Extensive simulation studies have been performed to demonstrate the efficiency of the proposed scheme using PSCAD/EMTDC and MATLAB. ©2009 IEEE.
Citation: Proceedings of 2009 International Conference on Power Systems, ICPS '09, (2009). Kharagpur
Issue Date: 2009
Keywords: Differential protection
Internal faults
Magnetizing inrush
Power transformer
Symmetrical components
ISBN: 9.78142E+12
Author Scopus IDs: 35408580300
Author Affiliations: Ala, S., MNNIT, Allahabad, India
Tripathy, M., MNNIT, Allahabad, India
Singh, A.K., MNNIT, Allahabad, India
Corresponding Author: Ala, S.; MNNIT, Allahabad, India; email:
Appears in Collections:Conference Publications [EE]

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