Powers in nonsinusoidal situations; A review of definitions and physical meaning

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/61.57980· OSTI ID:6545486

Emanuel, A E ^[1]

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1. Worcester Polytechnic Inst., MA (USA)

This article expands on the physical meaning of the reactive power in nonsinusoidal situations. It first surveys the sinusoidal waveform case, viewing the active current as a component of identical waveform with the voltage. This approach, when extended to nonsinusoidal waveforms, supports Fryze's model for apparent power, {ital S}{sup 2} = {ital P}{sup 2} + {ital Q {sub F}}{sup 2}. It is proved that the total reactive power {ital Q{sub F}} is composed from four distinctive types of elementary reactive powers. Each one of these basic reactive powers is identified as the amplitude of an oscillation of instantaneous power. The separation of {ital Q{sub F}} in {ital Q}{sub 1}, the reactive power at the system frequency and {ital Q{sub H}}, the reactive power at harmonic frequencies is recommended as an effective mean for monitoring filter efficacy and power factor compensation. Two major recommendations supported by the results of this study are made: to abolish the power models using distortion power and to measure the active power of the system frequency separately from the active power of the harmonics.

• OSTI ID: 6545486
• Journal Information: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA) Vol. 5:3; ISSN 0885-8977; ISSN ITPDE
• Country of Publication: United States
• Language: English

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