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Compensation of Nonlinearities in a Current Transformer for the Reconstruction


S. Bittanti, F.A. Cuzzola, F. Lorito, G. Poncia

IEEE Transactions on Control Systems Technology, vol. 9, no. 4, pp. 565-573

The measurement of the current in industrial electrical devices is often carried out by current transformers. The reliability of these devices is compromised when the measured current is higher than the nominal value, due to the saturation and hysteresis effects of the magnetic core. In this paper, a nonlinear model of the current transformer is identified by means of a separable least squares technique. This model is successfully employed for the estimation of the primary current starting from experimental measurements of the distorted secondary current. In this way, a fair estimate of the primary current is obtained even when its maximum intensity reaches up to sixty times (or more) its nominal value. Some sensible experimental trials are reported in order to demonstrate the effectiveness of the technique developed.


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% Autogenerated BibTeX entry
@Article { BitEtal:2001:IFA_785,
    author={S. Bittanti and F.A. Cuzzola and F. Lorito and G. Poncia},
    title={{Compensation of Nonlinearities in a Current Transformer for
	  the Reconstruction}},
    journal={IEEE Transactions on Control Systems Technology},
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