Hybrid algorithm for traction transformer differential protection based on intrinsic mode function energy entropy and correlation dimension. Issue 7 (1st July 2014)

• Record Type: Journal Article
• Authors: Tian, Xingjun; Li, Yunhua; Li, Xiaqing
• Is Part Of: IET generation, transmission & distribution. Volume 8:Issue 7(2014)
• Page Start: 1274
• Page End: 1283
• Publication Date: 2014-07-01
• Subjects: chaos -- correlation methods -- differential transformers -- entropy -- fault diagnosis -- magnetisation -- power transformer protection -- railway electrification -- traction; intrinsic mode function energy entropy -- correlation dimension -- fault identification -- V‐x‐type traction transformer differential protection -- high‐ speed railway -- internal short circuit -- IMF -- chaos theory -- differential‐current signal -- magnetising inrush -- fault measurement; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2012.0653
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : This study addresses fault identification in differential protection of a V/x‐type traction transformer used in a high‐speed railway. To quickly and accurately identify an internal short circuit in a traction transformer, a hybrid algorithm is developed that combines intrinsic mode function (IMF) energy entropy with the correlation dimension from chaos theory. IMF energy entropy and correlation dimension are sufficiently fast and sensitive to reflect the dynamic changes in the differential‐current signal from the traction transformer using different metrics; thus, this hybrid method can effectively identify an internal short circuit and magnetising inrush. Real‐time simulations and actual measurements of faults illustrate the validity of the proposed method.