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Chin. Phys. B, 2009, Vol. 18(5): 1787-1791    DOI: 10.1088/1674-1056/18/5/012
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Analysis of ferroresonance in neutral grounding system with nonlinear core loss

Hui Meng(惠萌), Zhang Yan-Bin(张彦斌), and Liu Chong-Xin(刘崇新)
School of Electrical Engineering, Xi'an Jiao Tong University, Xi'an 710049, China
Abstract  The chaotic behaviour exhibited by a typical ferroresonant circuit in a neutral grounding system is investigated in this paper. In most earlier ferroresonance studies the core loss of the power transformer was neglected or represented by a linear resistance. However, this is not always true. In this paper the core loss of the power transformer is modelled by a third order series in voltage and the magnetization characteristics of the transformer are modelled by an 11th order two-term polynomial. Extensive simulations are carried out to analyse the effect of nonlinear core loss on transformer ferroresonance. A detailed analysis of simulation results demonstrates that, with the nonlinear core loss model used, the onset of chaos appears at a larger source voltage and the transient duration is shorter.
Keywords:  ferroresonance      chaotic behaviour      nonlinear core loss  
Received:  07 November 2008      Revised:  18 November 2008      Accepted manuscript online: 
PACS:  05.45.-a (Nonlinear dynamics and chaos)  
  84.30.Jc (Power electronics; power supply circuits)  
  84.70.+p (High-current and high-voltage technology: power systems; power transmission lines and cables)  

Cite this article: 

Hui Meng(惠萌), Zhang Yan-Bin(张彦斌), and Liu Chong-Xin(刘崇新) Analysis of ferroresonance in neutral grounding system with nonlinear core loss 2009 Chin. Phys. B 18 1787

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