Measurement of three-phase transformer derating and reactive power demand under nonlinear loading conditions

Author

Fuchs, Ewald F. ; Lin, Dingsheng ; Martynaitis, Jonas

Author_Institution

Univ. of Colorado, Boulder, CO, USA

Volume

21

Issue

2

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

665

Lastpage

672

Abstract

The measurement of real and apparent power derating of three-phase transformers is important for transformers feeding nonlinear loads. This paper presents a new digital data-acquisition method for measuring derating and reactive power demand of three-phase transformers under full or partial load conditions. The accuracy requirements of the instruments employed (potential, current transformers, shunts, voltage dividers, optocouplers volt- and current meters) are addressed. Application examples demonstrate the usefulness of this new digital data-acquisition method.

Keywords

data acquisition; power measurement; power transformers; apparent power derating measurement; digital data acquisition method; nonlinear loading conditions; reactive power demand measurement; real power derating measurement; three-phase transformer derating measurement; Circuits; Copper; Current transformers; Frequency; Instruments; Loss measurement; Phase transformers; Power measurement; Reactive power; Voltage transformers; Harmonics; nonsinusoidal operation; reactive power demand; real and apparent power derating; transformer losses;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2005.858744

Filename

1610677