A Filter-Less Time-Domain Method for Reference Signal Extraction in Shunt Active Power Filters

Ghaly, Abdallah El; Tarnini, Mohamad; Moubayed, Nazih; Chahine, Khaled

doi:10.3390/en15155568

Cited by 14 publications

(4 citation statements)

References 23 publications

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“…In recent research [203], a new time-domain method for the reference current extraction without using an LPF/HPF in its implementation is proposed. It is called the matrix pencil method (MPM) and is based on the assumption that the non-linear load current can be expressed as a linear combination of sinusoidal signals and, consequently, the pure sine wave of the fundamental component can be synthesized.…”

Section: Reference Current Generation For the Direct Controlmentioning

confidence: 99%

Shunt Active Power Filters in Three-Phase, Three-Wire Systems: A Topical Review

Popescu,

Bitoleanu,

Suru

et al. 2024

Energies

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The increasingly extensive use of non-linear loads, mostly including static power converters, in large industry, commercial, and domestic applications, as well as the spread of renewable energy sources in distribution-generated units, make the use of the most efficient power quality improvement systems a current concern. The use of active power filters proved to be the most advanced solution with the best compensation performance for harmonics, reactive power, and load unbalance. Thus, issues related to improving the power quality through active power filters are very topical and addressed by many researchers. This paper presents a topical review on the shunt active power filters in three-phase, three-wire systems. The power circuit and configurations of shunt active filtering systems are considered, including the multilevel topologies and use of advanced power semiconductor devices with lower switching losses and higher switching frequencies. Several compensation strategies, reference current generation methods, current control techniques, and DC-voltage control are pointed out and discussed. The direct power control method is also discussed. New advanced control methods that have better performance than conventional ones and gained attention in the recent literature are highlighted. The current state of renewable energy sources integration with shunt active power filters is analyzed. Concerns regarding the optimum placement and sizing of the active power filters in a given power network to reduce the investment costs are also presented. Trends and future developments are discussed at the end of this paper. For a rigorous substantiation, more than 250 publications on this topic, most of them very recent, constitute the basis of bibliographic references and can assist readers who are interested to explore the subject in greater detail.

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Section: Reference Current Generation For the Direct Controlmentioning

confidence: 99%

Shunt Active Power Filters in Three-Phase, Three-Wire Systems: A Topical Review

Popescu,

Bitoleanu,

Suru

et al. 2024

Energies

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“…The p-q theory can also provide compensation for harmonic currents into the electrical grid and simplifies the calculations for active and reactive powers. The p-q theory has been widely used in the literature (Dobrucký et al 2022;Huaman et al 2022 ;Boukadoum et al 2022 ;Rath et al 2022 ;Chennai et al 2022 ;Benedicte et al 2022 ;El Ghaly et al 2022 ;Tsvetanov et al 2022).…”

Section: Introductionmentioning

confidence: 99%

A four-line active shunt filter to enhance the power quality in a microgrid

Mostefa

Belalia

Lantri

et al. 2023

Int. J. Renew. Energy Dev.

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In recent years, power quality has become a major concern for electric network managers. Active filtering control schemes ensure improved power quality of the electric network and are able to maintain a desired voltage level at the point of connection, regardless of the current absorbed by nonlinear loads. Harmonics can cause vibrations, equipment distortion, losses and sweatiness in transformers. The main objective of this work is to enhance the quality of energy in a microgrid consisting of 100 kW photovoltaic (PV) system and a 50 kW battery storage connected to nonlinear and unbalanced loads. This paper proposes a the four-arm parallel active filter with a on Proportional-Integral (PI) controller to mitigate the harmonic problems in a microgrid. In addition, an algorithm has been designed to eliminate the neutral current. The identification function is one of the most particular approach for extracting harmonics, it involves providing a current reference imposed by the active filter in order to carry out the filtering operation. Both the performance and the quality of the current harmonic compensation's depend strongly on the strategy adopted for the generating the current reference. In this work, the instantaneous power strategy p-q is chosen outstanding the simplicity and effectiveness in implementation. The proposed control strategy has been tested under simulations and the results have shown good tracking of the references and a significant reduction in the Total Harmonic Distorsion (THD) level under highly unbalanced conditions of the nonlinear loads. The current THD is reduced from 43.64 before filtering to 3.74% after the application of the four-arm filter, following the recommendations of IEEE-519 standard (THD less than 5%).

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“…Shunt active power filter (SAPF) is a popular choice for achieving high power quality in grid-connected power electronic converters [1][2][3][4][5][6][7][8][9]. However, SAPF mostly uses LCL output filters, which can cause resonance issues and poor power quality or instability.…”

Section: Introductionmentioning

confidence: 99%

Novel resonance damping circuits for LCL type shunt active power filter

Chen

Xiao

2023

IEICE Electron. Express

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This paper proposes a novel damping method for the resonance problem of the LCL output filter in the active power filter (SAPF). The wide control bandwidth of the SAPF has made this problem critical. The proposed method is based on an active damping circuit, which does not affect SAPF control. It involves an auxiliary converter connected in series with a filter capacitor to detect and inject back the resonant current as the reference signal of the converter. The stability of the proposed method is analyzed using frequency response and compared to the traditional method to prove theoretical feasibility. The experimental results demonstrate the effectiveness of the proposed method, which has a better switching harmonic suppression effect compared to the traditional method.

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A Filter-Less Time-Domain Method for Reference Signal Extraction in Shunt Active Power Filters

Cited by 14 publications

References 23 publications

Shunt Active Power Filters in Three-Phase, Three-Wire Systems: A Topical Review

Shunt Active Power Filters in Three-Phase, Three-Wire Systems: A Topical Review

A four-line active shunt filter to enhance the power quality in a microgrid

Novel resonance damping circuits for LCL type shunt active power filter

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