Research on Performance of Current Transformer Affected by DC Bias

Huan Wang; An Lan Mao; Qiong Xiang

doi:10.4028/www.scientific.net/AMR.805-806.741

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 805-806Research on Performance of Current Transformer...

Research on Performance of Current Transformer Affected by DC Bias

Abstract:

This paper expatiates on the transfer characteristics of current transformer (CT) affected by DC bias. It explains the causations and approaches of the DC bias established, base on equivalent circuit models, electromagnetic equations and results of test analyze the effects of CT by DC bias. Result indicates that, the DC bias current will move error curve of instrument CTs to negative coordinate, and accelerate initial saturation time of protective CTs. Finally, simulation has been done to prove theory analysis. The presented result provides consultation for proper selection of both instrument and protective CTs.

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Periodical:

Advanced Materials Research (Volumes 805-806)

Pages:

741-746

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.805-806.741

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Online since:

September 2013

Authors:

Huan Wang*, An Lan Mao, Qiong Xiang

Keywords:

DC Bias, Error Curve, Instrument CTs, Protective CTs, Saturation Time

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* - Corresponding Author

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