Frequency response analysis and modeling of measurement transformers under distorted current and voltage supply

Author

Samesima, M.I. ; de Oliveira, J.C. ; Dias, E.M.

Author_Institution

Fed. Univ. of Uberlandia, Brazil

Volume

6

Issue

4

fYear

1991

fDate

10/1/1991 12:00:00 AM

Firstpage

1762

Lastpage

1768

Abstract

The time and frequency response of current and potential transformers (CTs and PTs) operating under fundamental frequency conditions are well known. However, in the presence of harmonic frequencies, these transformers can exhibit significant errors. The authors present CT and PT comprehensive frequency domain equivalent circuits which, in addition to previous study features, include the hysteresis and eddy current effects. Furthermore, a practical approach which calculates the stray capacitances is proposed. By comparing theoretical and practical results the importance of considering parameters which are usually ignored in such studies is highlighted

Keywords

current transformers; eddy currents; equivalent circuits; frequency response; frequency-domain analysis; harmonics; magnetic hysteresis; potential transformers; current transformers; distorted current supply; distorted voltage supply; eddy current effects; frequency domain equivalent circuits; frequency response; harmonic frequencies; hysteresis effects; measurement transformers; potential transformers; stray capacitances; time response; Capacitance; Circuit testing; Current measurement; Current transformers; Distortion measurement; Equivalent circuits; Frequency domain analysis; Frequency measurement; Frequency response; Voltage transformers;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.97718

Filename

97718