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http://dx.doi.org/10.5515/KJKIEES.2017.28.12.993

High-Accuracy Current Sensing Technique Based on Magnetic Sensors for Three-Phase Switchboards  

Lee, Sungho (Department of Radio Science & Engineering, Korea Electronics Technology Institute)
Kim, Taemin (Department of Mechanical Engineering, Konkuk University)
Kim, Namsu (Department of Mechanical Engineering, Konkuk University)
Ahn, Youngho (RetiGrid, Co.)
Lee, Sungchul (Department of Radio Science & Engineering, Korea Electronics Technology Institute)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.12, 2017 , pp. 993-998 More about this Journal
Abstract
In this paper, a high-accuracy current sensing technique for three-phase current paths in an electrical switchboard is proposed. Conventional open-style current sensors using magnetic sensors show inaccurate sensing performance with more than 10% error due to undesired magnetic field interference from neighboring paths. To increase accuracy, large and expensive current transformers with large permeabilities have been used, which increased the cost and size. The proposed technique can improve the measured magnetic field by the calculation of magnetic interference effect from neighboring current paths. The relationship between neighboring magnetic fields and the desired magnetic field is theoretically analyzed in a general case. The proposed technique is verified using magnetic field simulations in a three-phase busbar environment.
Keywords
Current Sensor; Magnetic Sensor; Magnetic Field; Three-Phase Current; Switchboard;
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1 S. Ziegler, R. C. Woodward, H. H.-C. Iu, and L. J. Borle, "Current sensing techniques: A review," IEEE Sensors Journal, vol. 9, no. 4, pp. 354-376, Mar. 2009.   DOI
2 H.-G. Kim, G.-B. Kang, and D.-J. Nam, "Coreless hall current sensor for automotive inverters decoupling crosscoupled field," Journal of Power Electonics, vol. 9, no. 1, pp. 68-73, Jan. 2009.
3 Y. Ouyang, J. He, J. Hu, and S, X. Wang, "A current sensor based on the giant magnetoresistance effect: Design and potential smart grid applications," Sensors 2012, vol. 12, no. 11, pp. 15520-15541, 2012.   DOI
4 A.-R. A. M. Makky, H. Abo-Zied, F. N. Abdelbar, and P. Mutschler, "Design of the instrument current transformer for high frequency high power applications," in 2008 12th International Middle-East Power System Conference, Mar. 2008, pp. 230-233.
5 E. R. Olson, R. D. Lorenz, "Effective use of miniature multipoint field-based current sensors without magnetic cores," Industry Applications, IEEE Transactions on Industry Applications, vol. 46, no. 2, pp. 901-909, Feb. 2010.   DOI
6 Z. Jubia, L. Casado, G. Aldabaldetreku, A. Montero, E. Zubia, and G. Durana, "Design and development of a low-cost optical current sensor", Sensors 2013, vol. 13, no. 10, pp. 13584-13595, 2013.   DOI
7 M. Takahashi, K. Sasaki, and K. Terai, "Optical current sensor for DC measurement," in IEEE/PES Transmission and Distribution Conference and Exhibition, vol. 2012, no. 1, Oct. 2002, pp. 440-443.
8 J. C. Maxwell, A Treatise on Electricity and Magnetism, Oxford, Clarendon Press, 1881.