Title

On the Definition of Power-factor and Apparent Power in Unbalanced Polyphase Circuits with Sinusoidal Voltage and Currents

Document Type

Article

Publication Date

7-1993

Publication Title

IEEE Transactions on Power Delivery

Volume

8

First page number:

841

Last page number:

852

Abstract

Definition for the apparent power S and for the power factor PF in unbalanced polyphase circuits with sinusoidal waveforms are presented. It is proved that the definition S/sup 2/=(V/sub a//sup 2/+V/sub b//sup 2/+V/sub c//sup 2/) (I/sub a//sup 2/+I/sub b//sup 2/+I/sub c//sup 2/) has a definite physical meaning, leading itself to a convenient resolution in positive, negative and zero sequence, nonactive and active power. It is suggested that the power factor be represented with the help of the ratio P/sup +//S, where P/sup +/ is the positive sequence active powers.<>

Keywords

Electric currents; Alternating—Polyphase; Electric power factor; Electric power systems

Disciplines

Civil and Environmental Engineering | Controls and Control Theory | Electrical and Electronics | Environmental Engineering | Power and Energy

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Identifier

DOI: http://dx.doi.org/10.1109/61.252612

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