Distributed Power Quality Conditioning System for Three-Phase Four-Wire Low Voltage Networks

Dovgun, Valery; Temerbaev, Sergei; Chernyshov, Maxim; Novikov, V. V.; Boyarskaya, Natalia; Gracheva, Elena

doi:10.3390/en13184915

Cited by 26 publications

(22 citation statements)

References 33 publications

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“…When implementing this method, the equivalent conductivity of each consumer is determined, which is defined with significant assumptions and can have a significant error on the accuracy of the methods. A large number of works are devoted to improving methods for measuring the conductivity of the power supply system and consumers [29]- [34]. Invasive methods quite accurately estimate the parameters of the system and consumers based on the generation of current harmonics of a certain spectrum into the grid and the subsequent measurement of the harmonic voltage.…”

Section: Introductionmentioning

confidence: 99%

An assessment of the share contributions of distortion sources for various load parameters

Skamyin

Shklyarskiy

Dobush

et al. 2022

IJPEDS

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The method for assessing the contributions of distortion sources based on measuring consumer currents and calculating their projections onto the supply current vector is considered in the paper. Determination of contributions is carried out on the basis of the developed model of an industrial enterprise in the food industry in MATLAB Simulink software. This study presents various cases of simulation, including variable parameters of linear and non-linear consumer load, changes in parameters of external distortion sources and passive harmonic filters. It is shown that the considered method gives correct results in the absence of external distortions in the electrical grid. The considered criteria for the share contributions make it possible to estimate the most efficient place for installing a passive filter in the absence of external distortions. An indicator for evaluating external distortions has also been developed based on calculating the projection of the harmonic system current onto the harmonic current of the shunt filter at the considered frequency.

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Section: Introductionmentioning

confidence: 99%

An assessment of the share contributions of distortion sources for various load parameters

Skamyin

Shklyarskiy

Dobush

et al. 2022

IJPEDS

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“…A characteristic of these single-phase nonlinear loads is that in the spectrum of current harmonics there are significantly low-frequency harmonics, and the triplen harmonics, which have a zero rotational sequence, are added up in the common neutral wire which is subjected to currents from all three phases. In addition, the unbalance leads to additional zero rotational sequence currents and thus, the neutral conductor is overloaded [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Several types of compensating systems in three-phase four-wire power systems are reported in the literature. These usually consist of passive solutions [1,2], synchronous machines, specially-designed transformers such as zig-zag transformers [4,5] and active solutions such as active power filters (APFs) [1,2,[6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…In Dovgun at al. [1], a conditioning system consisting of several hybrid filter units which are installed in various nodes of the distribution network is proposed for compensation of excessive neutral currents and voltage distortions. The selective compensation of distorted voltages and currents, by the interdependent control of harmonic components, is approached.…”

Section: Introductionmentioning

confidence: 99%

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Improving Power Quality by a Four-Wire Shunt Active Power Filter: A Case Study

et al. 2021

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This paper presents the use of a three-phase four-wire shunt active power filter to improve the power quality in the Department of Industrial Electronics of a large enterprise from Romania. The specificity is given by the predominant existence of single-phase consumers (such as personal computers, printers, lighting and AC equipment). In order to identify the power quality indicators and ways to improve them, an A-class analyzer was used to record the electrical quantities and energy parameters in the point of common coupling (PCC) with the nonlinear loads for 27 h. The analysis shows that, in order to improve the power quality in PCC, three goals must be achieved: the compensation of the distortion power, the compensation of the reactive power and the compensation of the load unbalance. By using the conceived three-leg shunt active power filter, controlled through the indirect current control method in an original variant, the power quality at the supply side is very much improved. In the proposed control algorithm, the prescribed active current is obtained as a sum of the loss current provided by the DC voltage and the equivalent active current of the unbalanced load. The performance associated with each objective of the compensation is presented and analyzed. The results show that all the power quality indicators meet the specific standards and regulations and prove the validity of the proposed solution.

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“…The literature on power quality focuses on different topics. Some authors introduce techniques for improving the power quality of distribution networks, such as using static compensators [24], distributed energy storage systems [25], and hybrid power filters for unbalanced low-voltage grids [26]. Others focus on improving power quality in grids containing unbalanced systems.…”

Section: Introductionmentioning

confidence: 99%

Trends in Power Quality, Harmonic Mitigation and Standards for Light and Heavy Industries: A Review

Lumbreras

Gálvez²,

Collado³

et al. 2020

Energies

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The power quality of electrical grids is becoming an important issue worldwide. The electrical grid has to deliver sinusoidal voltages and currents without frequency or amplitude variations. However, the connection of non-linear loads generates harmonics that degrade the grid quality. The presence of harmonics in the load currents has many negative consequences and can distort the voltage waveform at the point of common coupling (PCC). Thus, it is essential to mitigate the harmonics in order to maintain a suitable grid quality. This is a shared responsibility between energy suppliers, manufacturers of electric and electronic equipment, and users. In this context, this work presents, for each stakeholder, a comprehensive analysis of their responsibilities and the standards that they should meet. Additionally, this paper reviews the most common types of filters used to comply with the applicable standards in industrial applications. Finally, in order to prove that active power filters allow maintaining good power quality in all types of grid, commercially available active power filters were installed in three different grids contexts: an office building, a factory, and a stadium with a large number of LEDs. The experimental results obtained were used to evaluate the impact of active filters on grid quality. This review would help users to overcome their grid distortion problems.

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Distributed Power Quality Conditioning System for Three-Phase Four-Wire Low Voltage Networks

Cited by 26 publications

References 33 publications

An assessment of the share contributions of distortion sources for various load parameters

An assessment of the share contributions of distortion sources for various load parameters

Improving Power Quality by a Four-Wire Shunt Active Power Filter: A Case Study

Trends in Power Quality, Harmonic Mitigation and Standards for Light and Heavy Industries: A Review

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