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International Journal of Emerging Electric Power Systems

Editor-in-Chief: Sidhu, Tarlochan

Ed. by Khaparde, S A / Rosolowski, Eugeniusz / Saha, Tapan K / Gao, Fei

CiteScore 2018: 0.86

SCImago Journal Rank (SJR) 2018: 0.220
Source Normalized Impact per Paper (SNIP) 2018: 0.430

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Volume 11, Issue 1


Detection of Saturation and Reconstruction of the Secondary Current of a CT

Ganesh Balu Kumbhar / Satish M Mahajan
Published Online: 2010-02-26 | DOI: https://doi.org/10.2202/1553-779X.2366

During a short circuit condition, core of a Current Transformer (CT) may become saturated due to large primary current containing a significant DC component. The saturation of the core distorts the secondary current which may cause malfunction of the protective devices connected to the CT. As a result of significant advances in the technology and deployment of digital relays in the last decade, the distorted secondary current can be reconstructed in a very short time. Several methods, which take into account the non-linear behavior of the CT, have been researched in the recent past. Processing time, accuracy, and online implementation are of prime importance while selecting a particular algorithm. In this paper, a comprehensive review of the different algorithms used for the detection of saturation as well as reconstruction of the distorted secondary current is presented.

Keywords: current transformer saturation; reconstruction of secondary current; protective relays

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Published Online: 2010-02-26

Citation Information: International Journal of Emerging Electric Power Systems, Volume 11, Issue 1, ISSN (Online) 1553-779X, DOI: https://doi.org/10.2202/1553-779X.2366.

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©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston.Get Permission

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