Measurement and computation of the excitation curve and loss angle of instrument voltage transformers

Author

Freiburg, Michael ; Jenau, Frank

Author_Institution

Dortmund Univ. of Technol., Dortmund, Germany

fYear

2013

fDate

2-5 Sept. 2013

Firstpage

1

Lastpage

5

Abstract

This paper introduces a method to obtain the excitation characteristics of instrument voltage transformers without parasitic influences from secondary side measurements. The effective winding capacitance of instrument voltage transformers (IVT) is modeled and measured. The capacitive current is subsequently subtracted from the data obtained by a measurement. The excitation current and loss angle can be obtained from measurements at rated frequency and of the frequency dependence of the impedance from the secondary side of the transformer.

Keywords

capacitance measurement; instrument transformers; loss measurement; potential transformers; transformer windings; capacitive current; effective winding capacitance; excitation current; excitation curve; instrument voltage transformers; loss angle; secondary side measurements; Capacitance; Current measurement; Frequency measurement; Instrument transformers; Loss measurement; Voltage measurement; Windings; Diagnostics; Excitation Curve; Ferroresonance Analysis; Instrument Voltage Transformer; Loss Angle;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference (UPEC), 2013 48th International Universities'

Conference_Location

Dublin

Type

conf

DOI

10.1109/UPEC.2013.6714882

Filename

6714882