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.
Received: 07 November 2008
Revised: 18 November 2008
Accepted manuscript online:
(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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