On the definition of power factor and apparent power in unbalanced polyphase circuits with sinusoidal voltage and currents

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 physi...

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Bibliographic Details
Published inIEEE transactions on power delivery Vol. 8; no. 3; pp. 841 - 852
Main Author Emanuel, A.E.
Format Journal Article
LanguageEnglish
Published United States IEEE 01.07.1993
Subjects
240100 - Power Systems- (1990-)
ALGORITHMS
Circuits
Coils
ELECTRONIC CIRCUITS
ENERGY SYSTEMS
Impedance
MATHEMATICAL LOGIC
Phase measurement
POWER FACTOR
Power measurement
Power system economics
Power system measurements
POWER SYSTEMS
POWER TRANSMISSION
POWER TRANSMISSION AND DISTRIBUTION
Q measurement
Reactive power
Voltage
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Summary: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.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0885-8977
1937-4208
DOI:10.1109/61.252612