A nonlinear model for the estimation of the primary current in current transformers

Author

Bittanti, S. ; Poncia, G. ; Ragaini, E.

Author_Institution

Dipt. di Elettron. e Inf., Politec. di Milano, Milan, Italy

fYear

1999

fDate

Aug. 31 1999-Sept. 3 1999

Firstpage

2801

Lastpage

2806

Abstract

The measurement of the current in industrial electrical devices is often carried out by resorting to the use of 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 measures of the distorted current.

Keywords

current transformers; electric current measurement; least squares approximations; magnetic cores; reliability; current measurement; current transformers; device reliability; hysteresis effects; industrial electrical devices; least squares technique; magnetic core; nonlinear model; primary current estimation; saturation effects; Current transformers; Estimation; Magnetic cores; Magnetic flux; Magnetic hysteresis; Mathematical model; Windings; Current compensation; Current transformers; Nonlinear identification; Separable least squares; modelling;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (ECC), 1999 European

Conference_Location

Karlsruhe

Print_ISBN

978-3-9524173-5-5

Type

conf

Filename

7099751