EPE  Vol.5 No.4 B , July 2013
Effects of DC Magnetic Bias on the Magnetic and Sound Fields of Transformer
Abstract: DC bias current flowing into the neutral point of power transformer will seriously affect the normal operation of AC power system. In this paper, exciting current, harmonic component of the excitation current, magnetic flux density and noise of transformer were analyzed when the transformer is in the no-load operation state based on field-circuit coupled method. Through the calculation and analysis, some reference bases are provided for design of transformer.
Cite this paper: Y. Li, Y. Gao, L. Li, D. Zhang and F. Han, "Effects of DC Magnetic Bias on the Magnetic and Sound Fields of Transformer," Energy and Power Engineering, Vol. 5 No. 4, 2013, pp. 1097-1100. doi: 10.4236/epe.2013.54B209.

[1]   Y.Y. Zhu, W. P. Jiang and Z. H. Zeng, “Studying on Measures of Restraining DC Current through Transformer Neutrals,” Proceedings of the CSEE, Vol. 5, No. 13, 2005, pp. 300-305.

[2]   M. Lahtinen and J. Elovaara. “GIC Occurrences and GIC test 400kV System Transformer,” IEEE Transaction on Power Delivery, Vol. 17, No. 2, 2002, pp. 555-561. doi:10.1109/61.997938

[3]   Y. Y. Yao, “Research on the DC Bias Phenomena of Large Power Transformers,” Shenyang: Shenyang University of Technology, 2000. pp. 415-420.

[4]   S. Yuan and T. S. Wang. “Summary of the Research on Transformer DC Magnetic Bias,” High Voltage Apparatus, Vol. 46, No. 3, 2010, pp. 83-87.