Elimination of inrush current using a new prefluxing method. Application to a single-phase transformer

Author

de Castro Cezar, V. Oiring ; Rouve, L.-L. ; Coulomb, J.-L. ; Zgainski, F.-X. ; Chadebec, Olivier ; Caillault, B.

Author_Institution

Grenoble Electr. Eng. Lab., Univ. of Grenoble, Grenoble, France

fYear

2014

fDate

2-5 Sept. 2014

Firstpage

1717

Lastpage

1723

Abstract

The random energization of power transformers may generate high inrush currents. In some cases, the inrush currents reach up to 10 p.u. of the rated current and cause damages mainly to the transformers but also to the power systems and the circuit breakers. For this reason, an efficient and new method of prefluxing has been developed to eliminate inrush currents. This method has been successfully implemented on a 1 kVA laboratory transformer. The prefluxing device consists of a simple source that operates at substantially low power.

Keywords

circuit breakers; electric current control; power systems; power transformers; apparent power 1 kVA; circuit breakers; inrush current elimination; laboratory transformer; power systems; power transformer random energization; prefluxing device; prefluxing method; single-phase transformer; Circuit faults; Magnetic flux; Magnetic hysteresis; Phase transformers; Power transformers; Transformer cores; Windings; inrush current reduction; residual flux; transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2014 International Conference on

Conference_Location

Berlin

Type

conf

DOI

10.1109/ICELMACH.2014.6960414

Filename

6960414