Real-time monitoring of iron-core and copper losses of transformers Under(Non)Sinusoidal operation

Author

Lin, Dingsheng ; Fuchs, Ewald F.

Author_Institution

Univ. of Colorado, Boulder, CO, USA

Volume

21

Issue

3

fYear

2006

fDate

7/1/2006 12:00:00 AM

Firstpage

1333

Lastpage

1341

Abstract

The online monitoring of iron-core and copper losses of single- and three-phase transformers is important, particularly for transformers feeding nonlinear loads. This paper devises a new digital data acquisition method for the separate online measurement of iron-core and copper losses of three-phase transformers under any full or partial-load conditions. The accuracy requirements of the instruments (voltage and current sensors, voltmeters, and ammeters) employed are addressed. The measurement uncertainties are acceptably low if voltage and current sensors with 0.1%-0.5% accuracy are used.

Keywords

ammeters; condition monitoring; electric current measurement; electric sensing devices; loss measurement; losses; power transformers; voltage measurement; voltmeters; ammeters; copper losses; current sensors; digital data acquisition method; iron-core losses; nonlinear loads; online measurement; online monitoring; real-time monitoring; single-phase transformers; three-phase transformers; voltage sensors; voltmeters; Ammeters; Copper; Data acquisition; Instruments; Loss measurement; Low voltage; Measurement uncertainty; Monitoring; Phase transformers; Voltmeters; Accuracy; copper losses; dc bias; harmonics; iron-core losses; nonsinusoidal operation; power transformer; real-time monitoring; uncertainty;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2006.874118

Filename

1645173