Identification of distribution features of the instantaneous power components of the electric energy of the circuit with polyharmonic current

Qawaqzeh, Mohamed; Bialobrzheskyi, Olexii; Zagirnyak, Мykhaylo

doi:10.15587/1729-4061.2019.160513

Cited by 7 publications

(4 citation statements)

References 9 publications

(20 reference statements)

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“…These issues are summarized in Bucci et al (2017). The proposed option for determining the indicators of electric power provides for its decomposition into components depending on the combination of current and voltage harmonics (Bucci et al , 2017; Qawaqzeh et al , 2019). The division of the instantaneous power into the active, reactive ones and the determination of the root mean square norms of its components (Qawaqzeh et al , 2019) is the basis for alternative determination of the level of power distortion.…”

Section: Previous Research Analysismentioning

confidence: 99%

“…Accordingly, in an arbitrary element of each layer with the circuit that corresponds to processes accompanied by currents and voltages with frequencies hω, the following power acts (Qawaqzeh et al , 2019) as follows: where Pa.h−h=UhIhcostrue(ψuh−ψihtrue) – harmonic h active power; Pb.h−h=UhIhsin⁡true(ψuh−ψihtrue) – harmonic h reactive power; Pa.h+h=UhIhcostrue(ψuh+ψihtrue) – harmonic h power cosine orthogonal component amplitude; and Pb.h−h=UhIhsin⁡true(ψuh+ψihtrue) – harmonic h power sine orthogonal component amplitude. We leave a …”

Section: Theoretical Partmentioning

confidence: 99%

“…Figure 1 illustrates the idea of this principle. Accordingly, in an arbitrary element of each layer with the circuit that corresponds to processes accompanied by currents and voltages with frequencies hv , the following power acts (Qawaqzeh et al, 2019) as follows:…”

Section: Current and Voltage Harmonics Powermentioning

confidence: 99%

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Electrical power components decomposition of periodic polyharmonic current

Bialobrzheskyi

Rodkin

Gladyr

2022

COMPEL

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Purpose At the current stage of electrical technology development, it is relevant to take into account the quality of electrical energy. It can be implemented if an assessed energy quality indicator is available. The amount of electrical energy is determined by active power, which is transmitted over a certain time period. In some cases, reactive power is included in the metering system. The distortion power is justifiably criticized and is not taken into account. The purpose of this paper consists in the substantiation of the indicator of the distortion of the periodic polyharmonic current electrical energy power, by separating from the instantaneous power such harmonics, which formed by same frequencies current and voltage harmonics. Design/methodology/approach Using the method of calculating linear polyharmonic current circuits, the following quantities are identified in instantaneous power: active, reactive and apparent powers of each harmonic. These components are known from references as canonical. Findings By the method of instantaneous power harmonic analysis, the components formed by current and voltage harmonics of the same frequency and different frequencies are distinguished. Research limitations/implications The RMS value of the instantaneous power due to current and voltage harmonics of different frequencies is justified in the work. This quantity allows you to distinguish the instantaneous power distortion level in comparison with the existing quantity. Practical implications The results can be used to assess the level of instantaneous power distortion level in commercial and technical metering systems. Originality/value The definition of instantaneous power distortion by extracting the canonical components from it and determining the root mean square value of the remainder is proposed.

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Section: Previous Research Analysismentioning

confidence: 99%

Section: Theoretical Partmentioning

confidence: 99%

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Electrical power components decomposition of periodic polyharmonic current

Bialobrzheskyi

Rodkin

Gladyr

2022

COMPEL

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“…where sk U is the effective value of the kth harmonic of the stator voltage; sk I is the effective value of the kth harmonic of the stator current; k  is the shift angle between the harmonics of voltage and current; sk sk s ХL    is the inductive resistance of the stator winding for the kth harmonics. Budeanu theory was further developed, for example, in [4][5][6][7][8][9][10][11]. In particular, in [12,13] this theory was used for the case of a single-phase voltage converter.…”

Section: Introductionmentioning

confidence: 99%

Reactive Power of Asynchronous Electric Drives with Semiconductor Converters

Kovalova

Kovalov

Shcherbak

2021

LEPE

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The purpose of the article is to obtain a ratio for determining the reactive power of induction motors when powered by semiconductor converters. The task is to determine the dependence of reactive power on control parameters of the converters. The research method used is computer simulation of electric drive based on Fryze power theory for non-sinusoidal currents. The result is the obtained expression for the calculation of reactive power, which takes into account the rated idle current of the motor with sinusoidal power supply and the type of converter, due to introducing special coefficients. Numerical values of the latter, depending on the control parameter, are obtained on computer models with their subsequent approximation. The scientific novelty of the research is in the further development of Fryze power theory in the direction of decomposition of non-sinusoidal current components using computer models. The practical significance is the obtained expression for determining the reactive power of an asynchronous electric drive with a thyristor voltage converter, on the basis of which the capacity of compensating capacitors is calculated to increase its energy efficiency.

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