Power related phenomena in three-phase unbalanced systems

Author

Czarnecki, Leszek S.

Author_Institution

Dept. of Electr. & Comput. Eng., Louisiana State Univ., Baton Rouge, LA, USA

Volume

10

Issue

3

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

1168

Lastpage

1176

Abstract

The paper deals with the power properties of three-phase circuits with unbalanced loads supplied from a three-wire line. It discusses various definitions of the apparent power in such circuits and shows that they cannot be interpreted in terms of any physical phenomena. The paper shows that the unbalanced power does not occur as an effect of the power oscillations and explains why this power does occur. The paper presents a decomposition of the supply current into the active, reactive, and unbalanced currents and shows that this decomposition can be considered as a fundamental for the comprehension of the power phenomena in such circuits and for the power factor evaluation

Keywords

load (electric); power factor; power systems; active current; apparent power; power factor; power oscillations; power related phenomena; power systems; reactive current; three-phase unbalanced systems; unbalanced current; unbalanced loads; Arithmetic; Circuits; Current supplies; Equations; Instruments; Load management; Power engineering and energy; Power engineering computing; Reactive power; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.400893

Filename

400893