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Journal articles on the topic 'Active power filters (APFs)'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Tlustý, Josef, Jiří Škramlík, Jan Švec, and Viktor Valouch. "Cooperative Control of Active Power Filters in Power Systems without Mutual Communication." Mathematical Problems in Engineering 2010 (2010): 1–13. http://dx.doi.org/10.1155/2010/517184.

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The procedure for calculating controller parameters of the APFs implemented into a multibus industrial power system for harmonic voltage mitigation is presented. The node-voltage-detection control strategy is applied and the basic controller parameters are found under the condition that the demanded THD factors at the buses where the APFs are placed will be obtained. A cooperative control of several APFs without mutual communication is proposed, simulated, and experimentally verified. By tuning the controller gains without considering the power circuit parameters, all APFs used tend to share h

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2

Lewandowski, Michal, and Janusz Walczak. "Comparison of classic and optimization approach to active power filters sizing and placement." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 6 (2014): 1877–90. http://dx.doi.org/10.1108/compel-11-2013-0371.

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Purpose – In most applications the active power filters (APFs) are used to reduce harmonic distortion of a nonlinear load which is located near the APF installation point. This classic approach allows to reduce the distortion introduced to the power system but do not guarantee that the cost of the APFs installation is optimal. The purpose of this paper is to compare the classic approach to harmonic compensation with an optimization method of sizing and placement of the APFs in an existing distributed power network. Design/methodology/approach – An exemplary real-life power system with distribu

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3

Vitoi, Lais Abrantes, Danilo Brandao, and Elisabetta Tedeschi. "Active Power Filter Pre-Selection Tool to Enhance the Power Quality in Oil and Gas Platforms." Energies 14, no. 4 (2021): 1024. http://dx.doi.org/10.3390/en14041024.

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This paper proposes a preliminary design tool for active power filters’ (APFs) solutions to be applied in offshore oil and gas platforms, where power quality indices are typically low, and reactive power compensation and current harmonic mitigation are often desired. The proposed approach considers that APF selection and rating is a trade-off between performance and size, and that both component and system aspects need to be optimized to achieve a well-tailored solution. As size and weight are critical constraints in offshore applications, possible benefits of using Silicon Carbide (SiC) switc

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Lakum, Ashokkumar, Bharti Parmar, Gautam Sarvaiya, and Aakash Kubavat. "Power Quality Enhancement through Active Power Filters in Radial Distribution System using Pelican Optimizer." International Journal of Electrical and Electronics Research 12, no. 2 (2024): 632–38. http://dx.doi.org/10.37391/ijeer.120240.

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In this paper, an application of pelican optimization algorithms (POA) for the enhancement of power quality (PQ) using active power filters (APFs) in radial distribution systems (RDS) is addressed. The harmonics is the main concern of the PQ. Nonlinear loads (NLs) inject the harmonics into the RDS. Here, nonlinear distributed generation (NLDG) is also considered along with NL at two end nodes. By using APFs, the harmonics are minimized to standard limits. Here, APFs are placed with proper size to minimize the harmonics and to improve the PQ. The POA is utilized to optimize the size of APF at p

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Rezapour, Hamed, MohamadAli Amini, Hamid Falaghi, and António M. Lopes. "Integration of Stand-Alone Controlled Active Power Filters in Harmonic Power Flow of Radial Distribution Networks." Energies 16, no. 5 (2023): 2463. http://dx.doi.org/10.3390/en16052463.

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Utilization of active power filters (APFs) is the most efficient method to reduce harmonic pollution in distribution networks. Previous approaches utilized APFs in integrated control schemes based on broad data-gathering systems. Since a broad data-gathering system is not available in most practical distribution networks, previously proposed approaches may not readily be implemented. This paper presents the utilization of stand-alone controlled APFs (SACAPFs) in radial distribution networks. Utilizing APFs with a stand-alone control system decreases implementation costs and complexity by makin

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Chahine, Khaled. "Machine Learning in Active Power Filters: Advantages, Limitations, and Future Directions." AI 5, no. 4 (2024): 2433–60. http://dx.doi.org/10.3390/ai5040119.

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Machine learning (ML) techniques have permeated various domains, offering intelligent solutions to complex problems. ML has been increasingly explored for applications in active power filters (APFs) due to its potential to enhance harmonic compensation, reference signal generation, filter control optimization, and fault detection and diagnosis. This paper reviews the most recent applications of ML in APFs, highlighting their abilities to adapt to nonlinear load conditions, improve fault detection and classification accuracy, and optimize system performance in real time. However, this paper als

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Lakum, Ashokkumar, Hitesh Karkar, Shilpa Kaila, and Shilpa Patel. "Application of Walrus Optimizer for Power Quality Improvement in Radial Distribution System." International Journal of Electrical and Electronics Research 12, no. 4 (2024): 1222–29. https://doi.org/10.37391/ijeer.120413.

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To increase power quality (PQ) in radial distribution systems (RDS) by utilizing active power filters (APFs), this research discusses the application of walrus optimization algorithms (WaOA). The main problem with the PQ is harmonics. The harmonics are added to the RDS by nonlinear loads (NLs). In this instance, together with NL at two end nodes, nonlinear distributed generation (NLDG) is additionally considered. APFs are used to decrease the harmonics to specified limits. In this instance, APFs are positioned correctly to reduce harmonics and improve PQ. WaOA is utilized to maximize the APF's

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Dash, Dipak Kumar, and Pradip Kumar Sadhu. "A Review on the Use of Active Power Filter for Grid-Connected Renewable Energy Conversion Systems." Processes 11, no. 5 (2023): 1467. http://dx.doi.org/10.3390/pr11051467.

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Renewable energy sources such as photovoltaic (PV) and wind energies are integrated into the grid due to their low global emissions and higher power conversion efficiency techniques. Grid-connected inverters are the core components of distributed generation networks. However, several harmonic current and voltage variations affect the performance of circuits in grid-connected networks. These issues can be easily resolved using passive filters, static vector generators, and dynamic energy filters (APFs). In higher-level units, the cost, dimensions, and weight of passive filters increase proporti

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Ehtesham, Mohammad, and Mohammad Junaid. "Advanced compensation scheme for enhancing photovoltaic power quality." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 3 (2022): 1223–30. https://doi.org/10.11591/ijeecs.v27.i3.pp1223-1230.

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With the photovoltaic (PV) system becoming highly popular in distribution network, there is also a growing concern regarding its adverse impacts over the power quality (PQ) of integrated system. This deterioration in PQ has sparked a new interest in the filtering techniques used in the power system for mitigating these problems. In contrast to conventional passive filters now active power filters (APFs) are being looked as the predominant solution. This paper presents a state-estimation based effective compensation strategy for enhancing performance of employed APF scheme. A novel control tech

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10

Torabi Jafrodi, Saeedeh, Mojgan Ghanbari, Mehrdad Mahmoudian, Arsalan Najafi, Eduardo M. G. Rodrigues, and Edris Pouresmaeil. "A Novel Control Strategy to Active Power Filter with Load Voltage Support Considering Current Harmonic Compensation." Applied Sciences 10, no. 5 (2020): 1664. http://dx.doi.org/10.3390/app10051664.

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This paper outlines some modifications to conventional active power filters (APFs) to compensate for the non-linearity of the load current. Since the APFs inject the required non-linearity of the load harmonic current to make the current source sinusoidal, a combination of passive power filters (PPFs) and APFs in series connection are more effective rather than individual usages. The proposed control approach based on sliding mode control (SMC) with a suitable sliding surface selection being applied to the proposed hybrid APF to increase the flexibility and reduce the complexity of the control

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11

Prof., Nilesh Chamat. "Control of Three Phase Shunt Active Power Filter SAPF by Instantaneous Reactive Power Theory." International Journal of Trend in Scientific Research and Development 2, no. 5 (2018): 1185–90. https://doi.org/10.31142/ijtsrd16980.

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Use of nonlinear loads has been increased in large extent in industries now a days which injects harmonic currents in supply system. These harmonics creates power quality issue. Shunt Active Power Filter SAPF is the popular and efficient solution to reduce these harmonics. SAPF can overcome voltage sag, eliminate harmonics and improves power factor. SAPF reduces total harmonic distortion THD to acceptable level. Reference current generation is the heart of APF. Reference current generation using instantaneous reactive power IRP theory is presented in this paper. IRP theory is widely used to co

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12

Al-Gahtani, Saad F., and R. M. Nelms. "Performance of a Shunt Active Power Filter for Unbalanced Conditions Using Only Current Measurements." Energies 14, no. 2 (2021): 397. http://dx.doi.org/10.3390/en14020397.

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Shunt active power filters (APFs) are used to address power quality issues such as harmonic distortion and power system imbalance. Many control systems for shunt APFs demand measurements of voltages and currents for the determination of instantaneous real and reactive power signals. From these signals, the reference currents of the shunt APF are calculated. A method of control for the APF shunt that only measures currents is proposed in this paper. The control method includes a modified technique to extract the positive and negative sequence components in the time domain. The reference current

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13

Parmar, Ashok, Bharti Parmar, Vijay Bhuva, et al. "Application of Advanced Soft Computing Techniques for Power Quality Improvement Using Active Power Filters in Radial Distribution System." International Research Journal of Multidisciplinary Scope 05, no. 03 (2024): 114–22. http://dx.doi.org/10.47857/irjms.2024.v05i03.01127.

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This paper investigates the application of advanced soft computing techniques: northern goshawk optimization (NGO) and coati optimization algorithm (COA) for improving power quality (PQ) using active power filter (APF) in radial distribution systems (RDS). While beneficial, the growing adoption of solar photovoltaic (SPV) systems introduces power quality concerns like harmonic distortion due to their nonlinear nature. This distribution generator (DG) type is called nonlinear DG (NLDG). Harmonics is the leading cause of poor PQ. This study considers nonlinear loads (NLs) at two end nodes and no

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14

Xiao, Chun, Yulu Ren, Qiong Cao, Lei Wang, and Jingyu Yin. "A Modified Control Strategy for Three-Phase Four-Switch Active Power Filters Based on Fundamental Positive Sequence Extraction." Processes 12, no. 11 (2024): 2586. http://dx.doi.org/10.3390/pr12112586.

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Three-phase four-switch active power filters (APFs) have attracted attention due to their low amount of semiconductors and low cost. The traditional control strategy of three-phase four-switch APFs usually includes phase-locked loops (PLLs) and rotating coordinate transformation for harmonic detection, resulting in complicated calculations and increased computation. In this paper, a modified control strategy for three-phase four-switch APFs based on fundamental positive sequence extraction is proposed, eliminating PLLs and rotating coordinate transformation with trigonometric calculations. Har

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15

Hashemi-Dezaki, Hamed, Masoud Mohammadalizadeh-Shabestary, Hossein Askarian-Abyaneh, and Mohammad Rezaei-Jegarluei. "NEW APPROACH TO OPTIMIZE THE APFS PLACEMENT BASED ON INSTANTANEOUS REACTIVE POWER THEORY BY GENETIC ALGORITHM." Journal of Electrical Engineering 65, no. 1 (2014): 12–20. http://dx.doi.org/10.2478/jee-2014-0002.

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Abstract In electrical distribution systems, a great amount of power are wasting across the lines, also nowadays power factors, voltage profiles and total harmonic distortions (THDs) of most loads are not as would be desired. So these important parameters of a system play highly important role in wasting money and energy, and besides both consumers and sources are suffering from a high rate of distortions and even instabilities. Active power filters (APFs) are innovative ideas for solving of this adversity which have recently used instantaneous reactive power theory. In this paper, a novel met

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16

Ehtesham, Mohammad, and Md Junaid. "Advanced compensation scheme for enhancing photovoltaic power quality." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 3 (2022): 1223. http://dx.doi.org/10.11591/ijeecs.v27.i3.pp1223-1230.

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With the photovoltaic (PV) system becoming highly popular in distribution network, there is also a growing concern regarding its adverse impacts over the power quality (PQ) of integrated system. This deterioration in PQ hassparked a new interest in the filtering techniques used in the power systemfor mitigating these problems. In contrast to conventional passive filters now active power filters (APFs) are being looked as the predominant solution.This paper presents a state-estimation based effective compensation strategy for enhancing performance of employed APF scheme. A novel control techniq

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17

Fan, Rui Xiang, and Hong Xia Xiao. "The Harmonic Suppression of Microgrid Based on Parallel Operation of Active Power Filters." Advanced Materials Research 805-806 (September 2013): 375–81. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.375.

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Aim to solve the harmonic problems in microgrid, parallel operation of APFs (active power filter) is studied. With the comparison and study of many strategies about current sharing and parallel operation, a new parallel method and control strategy of APF is proposed in microgrid. And the implementation method of parallel operation and current sharing is studied. Finally, both the simulation and experimental results demonstrates that the method is correct and effective, and the good dynamic performance and compensation effect have been proved.

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18

Mr., Amit Kumar Rajan, and E. Vijay Kumar Dr. "Comparison of Two Compensation Control Strategies for Shunt Active Power Filter in three Systems." International Journal of Trend in Scientific Research and Development 2, no. 5 (2018): 1923–26. https://doi.org/10.31142/ijtsrd18198.

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Use of nonlinear loads has been increased in large extent in industries now a days which injects harmonic currents in supply system. These harmonics creates power quality issue. Shunt Active Power Filter SAPF is the popular and efficient solution to reduce these harmonics. SAPF can overcome voltage sag, eliminate harmonics and improves power factor. SAPF reduces total harmonic distortion THD to acceptable level. Reference current generation is the heart of APF. Reference current generation using instantaneous reactive power IRP theory is presented in this paper. IRP theory is widely used to co

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19

Klimas, Maciej, Dariusz Grabowski, and Dawid Buła. "Application of Decision Trees for Optimal Allocation of Harmonic Filters in Medium-Voltage Networks." Energies 14, no. 4 (2021): 1173. http://dx.doi.org/10.3390/en14041173.

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The paper proposes a solution for the problem of optimizing medium voltage power systems which supply, among others, nonlinear loads. It is focused on decision tree (DT) application for the sizing and allocation of active power filters (APFs), which are the most effective means of power quality improvement. Propositions of some DT strategies followed by the results have been described in the paper. On the basis of an example of a medium-voltage network, an analysis of the selection of the number and allocation of active power filters was carried out in terms of minimizing losses and costs keep

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Zaro, Fouad. "Power Quality Improvement using Shunt Active Power Filter: An Industrial Zone Case Study." WSEAS TRANSACTIONS ON POWER SYSTEMS 18 (October 26, 2023): 179–85. http://dx.doi.org/10.37394/232016.2023.18.19.

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Power quality (PQ) improvement using active power filters (APF) is a topic of growing interest. APFs are effective in reducing harmonic distortion and improving power factor. They can be used in a variety of applications to improve the performance and reliability of electrical equipment. To address concerns with PQ improvement, this study offers an application of shunt APF in an industrial zone smart grid. the non-linear loads and unpredictable harmonics produced by on-grid PV inverters that represent the architecture of an industrial smart grid. Utilizing the MATLAB/SIMULINK software suite, a

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CHENNAI, Salim. "Simple Control Method for Unified Power Quality based on Five-level Inverter Topologies Operating under all Voltage Disturbances." Algerian Journal of Signals and Systems 7, no. 4 (2022): 170–77. http://dx.doi.org/10.51485/ajss.v7i4.171.

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This paper proposes a simple control scheme for UPQC (Unified Power Quality Conditioner) system based on five-level NPC (Neutral Point Clamped) inverter capable to compensate all disturbances under all voltage conditions. The proposed UPQC is designed by the integration of shunt and series APFs (Active Power Filters) sharing a common dc bus capacitor. The dc voltage is maintained constant using proportional integral voltage controller. To get the reference signals for shunt and series APFs, synchronous current detection method (SCD) and instantaneous reactive power (PQ) strategies are adopted.

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Gowrishankar, A., and M. Ramasamy. "SPV-Based UPQC with Modified Power Angle Control Scheme for the Enhancement of Power Quality." Journal of Circuits, Systems and Computers 29, no. 04 (2019): 2050064. http://dx.doi.org/10.1142/s0218126620500644.

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Unified Power Quality Conditioner (UPQC) with a modified Power Angle Control (PAC) scheme is presented for effective interconnection of renewable energy system into the grid. The UPQC consists of both shunt and series Active Power Filters (APFs). The shunt and series APF is one of the most effective custom power devices, which provides compensation for current and voltage-based disturbances, respectively. The shunt APF supplies active power to the load from the Distributed Generation (DG) in addition to reactive power demand supplied by it. Because of this functionality, the Volt–Ampere (VA) b

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Kadem, Mohamed, Abdelhafid Semmah, Patrice Wira, and Abdelkader Slimane. "Artificial Neural Network Active Power Filter with Immunity in Distributed Generation." Periodica Polytechnica Mechanical Engineering 64, no. 2 (2020): 109–19. http://dx.doi.org/10.3311/ppme.12775.

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With an electrical grid shifting toward Distributed Generation (DG), the emerging use of renewable energy resources is continuously creating challenges to maintain an acceptable electrical power quality thought-out the grid; Therefore, in an energy market where loads are becoming more and more sensitive in a distributed generation filled with polluting nonlinear loads, power quality improvement devices such Active Power Filters (APFs) have to evolve to meet the new standards, since theirs conventional control strategies can't properly operate when multiple power quality problems happens at onc

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Sivakumar, M., P. Kannan, and S. Chenthur Pandian. "Mitigation of PQ Issues Using an Enhanced UPQC-Based ANN Approach." Journal of Circuits, Systems and Computers 28, no. 03 (2019): 1950046. http://dx.doi.org/10.1142/s0218126619500464.

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Nowadays, the power quality (PQ)-related issues have become more prominent in power electronic devices. For compensating PQ disturbances various types of power devices are used. The unified power quality conditioner (UPQC) is one of the power electronic devices that is used for compensating the PQ. To reduce the PQ disturbances, the performance of series and shunt active power filters (APFs) must be improved. In this paper, an enhanced controller is proposed for improving the performance of series and shunt APFs and compensating the PQ. The enhanced technique used is the combination of artific

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Mandapati, Nikhil, and Rajagopala K. "Power Quality Enhancement using A Unified Power Quality Conditioner (UPQC)." International Journal of Engineering and Advanced Technology (IJEAT) 11, no. 5 (2022): 168–70. https://doi.org/10.35940/ijeat.E3627.0611522.

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<strong>Abstract: </strong>This project proposes effective work to increase the power quality in the power system by using a Unified Power Quality Conditioner (UPQC) The advanced use of power electronic devices introduces harmonics in the power system which creates a problem in the quality of power delivered. Although several methods are there for improving power quality standards, including the use of active and passive filters, and Hybrid filters have been developed, these methods face issues and are ineffective due to the growing number of applications. The UPQC is an advanced technique for

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Ma, Chao-Tsung, and Zhen-Huang Gu. "Design and Implementation of a GaN-Based Three-Phase Active Power Filter." Micromachines 11, no. 2 (2020): 134. http://dx.doi.org/10.3390/mi11020134.

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Renewable energy (RE)-based power generation systems and modern manufacturing facilities utilize a wide variety of power converters based on high-frequency power electronic devices and complex switching technologies. This has resulted in a noticeable degradation in the power quality (PQ) of power systems. To solve the aforementioned problem, advanced active power filters (APFs) with improved system performance and properly designed switching devices and control algorithms can provide a promising solution because an APF can compensate for voltage sag, harmonic currents, current imbalance, and a

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Liang, Ying Yu, Xing Tao Xu, Jian Zheng Liu, Yi Wang, and Qi Xun Yang. "A Shunt Active Filter Based on Voltage Detection for Harmonic Filtering and Resonance Suppression." Applied Mechanics and Materials 457-458 (October 2013): 1113–17. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.1113.

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In most occasions shunt APFs and capacitors used for power factor correction exist simultaneously in the distribution network for saving costs. Ideally, APFs are used for harmonics filtering and capacitors are used for power factor correction. However, traditional control methods of APF have potential risk of resonance, affecting the stability and the effect of harmonic compensation, if the detected current contains capacitive current. This paper proposes a new control method based on voltage detection of point of common Coupling(PCC). Theoretical analysis and simulation demonstrate the new co

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Sarafrazi, Parisa, Seyed Taher, and Ali Akhavan. "A Robust Backstepping Controller Based on Nonlinear Observer for Shunt Active Filters to Improve Power Quality in Four-Wire Distribution Systems." Jordan Journal of Electrical Engineering 10, no. 4 (2024): 1. http://dx.doi.org/10.5455/jjee.204-1700421844.

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This article introduces a novel approach to enhance the performance of LCL based active power filters (APFs) in four-wire distribution systems by employing a nonlinear current control strategy. The strategy combines backstepping control (BSC) and a nonlinear disturbance observer (NDOB) to effectively manage harmonic and interharmonic grid currents. By situating the shunt active power filter (SAPF) at the point of common coupling (PCC) via the LCL filter, the technique ensures that grid connected currents remain balanced and purely sinusoidal. The integration of NDOB with BSC aims to fortify th

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Jawad, Raheel, Rawaa Jawad, and Zahraa Salman. "Ant Colony Algorithm (ACO) Applied for Tuning PI of Shunt Active Power Filter (SAPF)." Iraqi Journal for Electrical and Electronic Engineering 17, no. 2 (2021): 204–11. http://dx.doi.org/10.37917/ijeee.17.2.23.

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In the present-day decade, the world has regarded an expansion in the use of non-linear loads. These a lot draw harmonic non-sinusoidal currents and voltages in the connection factor with the utility and distribute them with the useful resource of the overall performance of it. The propagation of these currents and voltages into the grids have an effect on the electricity constructions in addition to the one of various client equipment. As a result, the electrical strength notable has come to be critical trouble for each client and distributor of electrical power. Active electrical electricity

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Kishankumar, V. Dave, and B. Parmar Sandip. "Power Quality Improvement by Unified Power Quality Conditioner." International Journal of Trend in Scientific Research and Development 3, no. 1 (2018): 786–91. https://doi.org/10.31142/ijtsrd19088.

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In a powers system network there are many problems related to power quality. So to improve power quality of a system we use different devices such as active power filters. Active power filters are classified into two types that is Shunt Active Power Filter APF and Series Active Power Filter APF and combination of both is known as UPQC Unified Power Quality Conditioner . Here we have done simulation of Shunt Active Power Filter, Series Active Power Filter and Unified Power Quality Conditioner. Shunt APF is used to mitigate the problems due to current harmonics which is because of non linear loa

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Abdallah, Ben Abdelkader, Abdelkhalek Othmane, Khalil Bousserhane Ismail, Amine Hartani Mohamed, and Omari Aymen. "A comparative study and experimental validation on single phase series active power filter control strategies using PI, FLC and sliding mode controllers." International Journal of Power Electronics and Drive System (IJPEDS) 10, no. 2 (2019): 731–43. https://doi.org/10.11591/ijpeds.v10.i2.pp731-743.

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sagswell and harmonics voltages problems that can affect the power quality. Among the devices that solve such power quality perturbations, the series active power Filter APFS is considered in this paper. Thus, a single phase APFS is developed through an analytic analysis, supported by an experimental validation, where we applied classical proportional integrator PI, fuzzy logic FLC and sliding mode SM controllers to improve the dynamic response of the APFS. In addition, a comparative study between these control strategies has made in order to mitigate voltage sag-swell and especially harmonics

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Das, Soumya Ranjan, Alok Kumar Mishra, Prakash Kumar Ray, Surender Reddy Salkuti, and Seong-Cheol Kim. "Application of Artificial Intelligent Techniques for Power Quality Improvement in Hybrid Microgrid System." Electronics 11, no. 22 (2022): 3826. http://dx.doi.org/10.3390/electronics11223826.

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The hybrid AC-DC microgrid (MG) has gained popularity recently as it offers the benefits of AC and DC systems. Interconnecting AC-DC converters are necessary since the MG has both DC and AC sub-grids. Adding an extra harmonic adjustment mechanism to the interlinking converters is promising because non-linear AC loads can worsen the quality of the voltage on the AC bus. The interlinking converters’ primary function is to interchange real and reactive power between DC and AC sub-grids, so the typical harmonic controlling approach implemented for active power filters (APFs) might not be appropria

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Cao, Xudong, Kun Dong, and Xueliang Wei. "An Improved Control Method Based on Source Current Sampled for Shunt Active Power Filters." Energies 13, no. 6 (2020): 1405. http://dx.doi.org/10.3390/en13061405.

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Active power filters (APFs) are dynamic power electronic devices that suppress harmonics and reactive power. To simplify the detection and extraction of traditional APF harmonics and reactive current, this paper proposes a direct source current control based on a three-phase three-wire shunt APF. The compensation principle and control method of the source current are analyzed systematically. The currents can be controlled without static errors by a proportional-integral (PI) controller in d-q rotating coordinates. Therefore, the compensation accuracy and dynamic performance of the system can b

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Das, Soumya Ranjan, Prakash Kumar Ray, Arun Kumar Sahoo, et al. "A Comprehensive Survey on Different Control Strategies and Applications of Active Power Filters for Power Quality Improvement." Energies 14, no. 15 (2021): 4589. http://dx.doi.org/10.3390/en14154589.

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Power quality (PQ) has become an important topic in today’s power system scenario. PQ issues are raised not only in normal three-phase systems but also with the incorporation of different distributed generations (DGs), including renewable energy sources, storage systems, and other systems like diesel generators, fuel cells, etc. The prevalence of these issues comes from the non-linear features and rapid changing of power electronics devices, such as switch-mode converters for adjustable speed drives and diode or thyristor rectifiers. The wide use of these fast switching devices in the utility

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Nikkhah Kashani, Hoda, Reza Rouhi Ardeshiri, Meysam Gheisarnejad, and Mohammad-Hassan Khooban. "Optimal Cascade Non-Integer Controller for Shunt Active Power Filter: Real-Time Implementation." Designs 6, no. 2 (2022): 32. http://dx.doi.org/10.3390/designs6020032.

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Active power filters (APFs) are used to mitigate the harmonics generated by nonlinear loads in distribution networks. Therefore, due to the increase of nonlinear loads in power systems, it is necessary to reduce current harmonics. One typical method is utilizing Shunt Active Power Filters (SAPFs). This paper proposes an outstanding controller to improve the performance of the three-phase 25-kVA SAPF. This controller can reduce the current total harmonic distortion (THD), and is called fractional order PI-fractional order PD (FOPI-FOPD) cascade controller. In this study, another qualified contr

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Ben Abdelkader, Abdallah, Othmane Abdelkhalek, Ismail Khalil Bousserhane, Mohamed Amine Hartani, and Aymen Omari. "A comparative study and experimental validation on single phase series active power filter control strategies using pi, flc and sliding mode controllers." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (2019): 731. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp731-743.

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<p><span>Sensitive loads are widely used in industrial, which is the main cause of sag-swell and harmonics voltages problems that can affect the power quality. Among the devices that solve such power quality perturbations, the series active power Filter APFS is considered in this paper. Thus, a single phase APFS is developed through an analytic analysis, supported by an experimental validation, where we applied classical proportional integrator PI, fuzzy logic FLC and <a name="_Hlk525422768"></a>sliding mode SM controllers to improve the dynamic response of the APFS. In

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Hong, Qian-Rong, Pak-Ian Chan, Wai-Kit Sou, Cheng Gong, and Chi-Seng Lam. "Linear Quadratic Regulator Optimal Control with Integral Action (LQRIC) for LC-Coupling Hybrid Active Power Filter." Applied Sciences 12, no. 19 (2022): 9772. http://dx.doi.org/10.3390/app12199772.

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Renewable energy generation and nonlinear load devices will generate harmonics and reactive power to power grids, resulting in current distortion and low power factors. To solve the power quality problems, the LC-coupling hybrid active power filter (LC-HAPF) is proposed, with lower DC-link voltage and lower cost compared with conventional active power filters (APFs). The LC-HAPF requires a controller to operate, therefore, hysteresis current control (HCC) and proportional current control (PCC) were proposed. However, they both result in significant steady-state error. Hence, linear quadratic r

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CHENNAI, Salim. "Impact of Converter Topology on the Shunt Active Power Filter Systems Efficiency." Algerian Journal of Signals and Systems 8, no. 2 (2023): 59–66. http://dx.doi.org/10.51485/ajss.v8i2.193.

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This paper presents the performance of shunt active power filters (Shunt APFs) which can compensate harmonic currents generated by no-linear load based on five and seven-level neural point clamped (NPC) inverters. Multilevel inverters are currently being investigated and used in several industrial applications. Their advantages include the capability to reduce the harmonic content and decrease the voltage or current ratings of the semiconductors. On the other side, fuzzy techniques are successfully employed in various industrial applications; they represent a good alternative to traditional co

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Buła, D., and M. Lewandowski. "Comparison of frequency domain and time domain model of a distributed power supplying system with active power filters (APFs)." Applied Mathematics and Computation 267 (September 2015): 771–79. http://dx.doi.org/10.1016/j.amc.2014.11.082.

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Muthuvel, K., and M. Vijayakumar. "Solar PV Sustained Quasi Z-Source Network-Based Unified Power Quality Conditioner for Enhancement of Power Quality." Energies 13, no. 10 (2020): 2657. http://dx.doi.org/10.3390/en13102657.

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In this article, a Quasi Z-source inverter (QZSI)-based unified power quality conditioner (UPQC) backed by the solar photovoltaic (SPV) is presented in order to enhance power quality. The UPQC consists of converters connected in parallel and series. The active power filters (APFs) connected in parallel and series is one of the versatile custom power circuitries to reduce current and voltage instabilities. The main functions of QZSI can increase the variable direct current (DC) voltage to any given alternating current (AC) output voltage, reduce the necessary elements, and alleviate harmonic co

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Rao, P. Nageswara, S. Jaya Prakash, Syamala Siva Prasad, and M. Vnod Kumar. "Utilizing Artificial Neural Network For the Regulation Of Electric Springs In Renewable Systems." E3S Web of Conferences 472 (2024): 01005. http://dx.doi.org/10.1051/e3sconf/202447201005.

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Now a days the research work is going on to improve the performance of electric springs (ESs) by integrating a current source inverter (CSI) and a neural network controller. A new ES configuration that includes CSIs is introduced to enhance ES functionality. This configuration is accompanied by a control strategy that involves direct current control and mitigation of harmonic distortion, like the methods used in active power filters (APFs). By transitioning from voltage source inverters (VSIs) to CSIs and integrating a neural network controller, a significant reduction in total harmonic distor

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CHENNAI, Salim. "Investigation on the Performance of UPQC System based on Five and Seven-level NPC Inverter Topologies." Electrotehnica, Electronica, Automatica 72, no. 2 (2024): 13–21. http://dx.doi.org/10.46904/eea.23.72.2.1108002.

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This article presents an investigation on the performance of unified power quality conditioner (UPQC) system based on five and seven-level neutral point clamped (NPC) inverters, using similar strategy to identified current or voltage references and analogue control approaches for switching pulses generation via combined phase disposition-sinusoidal pulse width modulation (PD-SPWM) and fuzzy logic control scheme. The UPQC system is adopted to compensate the current source harmonics and all voltage disturbances simultaneously. It is designed by the combination of series and shunt active power fi

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Zhao, Zhenqing, Kai Song, Boyan Huang, et al. "A Robust Linear Active Disturbance Rejection Control for Renewable Energy Grid-Connected System Based on APF." Sustainability 17, no. 2 (2025): 632. https://doi.org/10.3390/su17020632.

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With the energy transition and changes in electrical load structures, harmonic distortion in power systems is increasingly threatening grid stability, especially during the integration of renewable energy sources. Active power filters (APFs) are commonly used to improve power quality, but current fluctuations and voltage instability caused by DC-side capacitor charging and discharging hinder effective harmonic compensation. To address this, this paper presents a method combining a variable-step-size adaptive linear predictor with linear active disturbance rejection control (VALP-LADRC). By int

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Dr., S. Srinath. "Mitigation of Power Quality Problems in Distribution System under Non Sinusoidal Supply Condition with UPQC using Mixed Mode Control Strategy." Journal of Instrumentation and Innovation Sciences 4, no. 1 (2019): 19–47. https://doi.org/10.5281/zenodo.2640017.

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A mixed mode control strategy for Unified Power Quality Conditioner (UPQC), which involves no transformation, is presented and demonstrated for compensating the power quality problems under non sinusoidal supply condition in a three phase distribution system. UPQC is a combination of Series Active Power Filter (SAPF) and Parallel Active Power Filter (PAPF) with a common dc link. The series compensation voltage and shunt compensation current are controlled in the present work by SPWM switching of SAPF and hysteresis control of PAPF respectively. Exhaustive simulation studies are carried out usi

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Kumarasabapathy, N., and P. S. Manoharan. "MATLAB Simulation of UPQC for Power Quality Mitigation Using an Ant Colony Based Fuzzy Control Technique." Scientific World Journal 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/304165.

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This paper proposes a fuzzy logic based new control scheme for the Unified Power Quality Conditioner (UPQC) for minimizing the voltage sag and total harmonic distortion in the distribution system consequently to improve the power quality. UPQC is a recent power electronic module which guarantees better power quality mitigation as it has both series-active and shunt-active power filters (APFs). The fuzzy logic controller has recently attracted a great deal of attention and possesses conceptually the quality of the simplicity by tackling complex systems with vagueness and ambiguity. In this rese

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Qasim, Ahmed, Fadhil Tahir, and Ahmed Alsammak. "Voltage Sag, Voltage Swell and Harmonics Reduction Using Unified Power Quality Conditioner (UPQC) Under Nonlinear Loads." Iraqi Journal for Electrical and Electronic Engineering 17, no. 2 (2021): 140–50. http://dx.doi.org/10.37917/ijeee.17.2.16.

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In light of the widespread usage of power electronics devices, power quality (PQ) has become an increasingly essential factor. Due to nonlinear characteristics, the power electronic devices produce harmonics and consume lag current from the utility. The UPQC is a device that compensates for harmonics and reactive power while also reducing problems related to voltage and current. In this work, a three-phase, three-wire UPQC is suggested to reduce voltage-sag, voltage-swell, voltage and current harmonics. The UPQC is composed of shunt and series Active Power Filters (APFs) that are controlled ut

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Primorac, Mario, Zvonimir Klaić, Heidi Adrić, and Matej Žnidarec. "Co-Simulation Model for Determination of Optimal Active Power Filters Settings in Low-Voltage Network." Applied Sciences 15, no. 1 (2025): 469. https://doi.org/10.3390/app15010469.

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Current trends in the use of energy storage, electric mobility, and the integration of a large number of distributed generations at the distribution level can have positive effects on reducing loads and losses in the network. An excessive and uncontrolled level of integration of the above trends leads to various problems related to the power quality. Distortion of the voltage and current waveforms caused by nonlinear loads is manifested through harmonics and can be classified as one of the most essential parameters of electricity quality. Reducing harmonics thus becomes the primary goal for im

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Dybko, Maksim, Sergey Brovanov, and Aleksey Udovichenko. "DC-Link Capacitance Estimation for Energy Storage with Active Power Filter Based on 2-Level or 3-Level Inverter Topologies." Electricity 6, no. 1 (2025): 13. https://doi.org/10.3390/electricity6010013.

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Energy storage systems (ESSs) and active power filters (APFs) are key power electronic technologies for FACTS (Flexible AC Transmission Lines). Battery energy storage has a structure similar to a shunt active power filter, i.e., a storage element and a voltage source inverter (VSI) connected to the grid using a PWM filter and/or transformer. This similarity allows for the design of an ESS with the ability to operate as a shunt APF. One of the key milestones in ESS or APF development is the DC-link design. The proper choice of the capacitance of the DC-link capacitors and their equivalent resis

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Urrea-Quintero, Jorge-Humberto, Nicolás Muñoz-Galeano, and Jesús M. López-Lezama. "Robust Control of Shunt Active Power Filters: A Dynamical Model-Based Approach with Verified Controllability." Energies 13, no. 23 (2020): 6253. http://dx.doi.org/10.3390/en13236253.

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This paper presents the robust control of Three-Leg Split-Capacitor Shunt Active Power Filters (TLSC SAPFs) by means of structured H∞ controllers for reactive, unbalanced, and harmonic compensation and the DC-link bus voltage regulation. Robust controller synthesis is performed based on the TLSC SAPF dynamical model including power losses in passive elements. Before the control implementation, a systematic procedure for the nonlinear controllability verification of the converter and its quantification using the set-theoretic approach is presented. Controllability verification serves to accurat

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Abdelkader, Yousfi, Allaoui Tayeb, and Chaker Abdelkader. "A new approach to extract reference currents for multilevel shunt active filter in three phase systems." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 3 (2020): 1459–67. https://doi.org/10.11591/ijpeds.v11.i3.pp1459-1467.

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In this article, we present a new study of technique to extract reference currents for three-level shunt active filter controlling by fuzzy logic. The APFs is realized using three phase voltage and the carrier-based PWM strategy. A new technique for identifying reference currents will be developed. It is based on concordia method using multi-variable filter, and makes the total or selective extraction harmonic currents of references, and by consequence making their compensations, total or selective. The results of digital simulation in the Matlab-Simulink environment of a system of power to th

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