Influence of Measurement Errors on Transformer Inrush Currents Using Different Material Models

Author

Bartel, Alexandre ; HuÌˆlsmann, Timo ; KuÌˆhn, Jan ; Pulch, Roland ; SchoÌˆps, Sebastian

Author_Institution

Dept. of Appl. Math. & Numerical Anal., Bergische Univ. Wuppertal, Wuppertal, Germany

Volume

50

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

485

Lastpage

488

Abstract

Inrush currents are an important factor in the design of electrical machines. The uncertainties in measurements of magnetic materials parameters propagate via fitted material laws into the simulation results. In this paper, generalized polynomial chaos is used to compute the solution statistics and perform an analysis of variance; by this, it is revealed which measurement points are the most influential. As fitting strategies, we compare the result for the Brauer model and a smoothing spline approach. This is an essential step forward compared with considering only the uncertainty quantification for analytical material curve models.

Keywords

electric machines; measurement errors; measurement uncertainty; soft magnetic materials; splines (mathematics); transformers; Brauer model; analytical material curve models; electrical machines; fitted material laws; generalized polynomial chaos; magnetic materials parameters; material models; measurement errors; smoothing spline; transformer inrush currents; uncertainty quantification; Computational modeling; Current measurement; Mathematical model; Polynomials; Splines (mathematics); Surges; Uncertainty; Analysis of variance; electromagnetics; measurement uncertainty; nonlinearity; soft magnetic materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2284072

Filename

6749221