Determination of the air-core reactance of transformers by analytical formulae for different topological configurations and its comparison with an electromagnetic 3D approach

Author

Rioual, Michel ; Guillot, Yves ; Crepy, Cyrille

Author_Institution

R&D Div., Electricite De France, Clamart, France

fYear

2009

Firstpage

1

Lastpage

8

Abstract

This document describes the determination of the saturated inductance of a transformer, which is the slope of the saturation curve Phi(I) under highly saturated conditions. This parameter, which has a strong impact on the overvoltages when energizing a transformer, has been determined from analytic formulae for different transformer technologies. A comparison with the values derived from an electromagnetic 3D calculation is also given in this paper.

Keywords

overvoltage; power transformers; air-core reactance; electromagnetic 3D approach; overvoltage impact; topological configuration; transformer energization; transformer inductance saturation; Electromagnetic analysis; Impedance; Inductance; Magnetic cores; Power transformers; Strontium; Surges; Transformer cores; Windings; Zirconium; Energization; air-core inductance; air-core reactance; core-type; inrush currents; power transformer; saturated inductance; shell-type;

fLanguage

English

Publisher

ieee

Conference_Titel

Power & Energy Society General Meeting, 2009. PES '09. IEEE

Conference_Location

Calgary, AB

ISSN

1944-9925

Print_ISBN

978-1-4244-4241-6

Type

conf

DOI

10.1109/PES.2009.5275962

Filename

5275962